Provided by: ecasound_2.4.6.1-1_i386 bug


       ecasound - sample editor, multitrack recorder, fx-processor, etc.


       ecasound  [  general_options  ]  {  [  chain_setup ] [ effect_setup ] [
       input_setup ] [ output_setup ] }


       Ecasound  is  a  software  package  designed   for   multitrack   audio
       processing.  It  can  be  used  for  simple  tasks like audio playback,
       recording and format conversions, as  well  as  for  multitrack  effect
       processing, mixing, recording and signal recycling. Ecasound supports a
       wide range of audio inputs, outputs and effect algorithms.  Effects and
       audio objects can be combined in various ways, and their parameters can
       be controlled by operator objects  like  oscillators  and  MIDI-CCs.  A
       versatile console mode user-interface is included in the package.


       Note! All options except those mentioned in Global options, can be used
       in ecasound chainsetup files (.ecs).


       -c     Starts ecasound in interactive mode. In interactive mode you can
              control ecasound with simple commands ("start", "stop", "pause",
              etc.). See ecasound-iam(1).

       -C     Disables ecasound’s interactive mode (see ’-c’ and ’-K’).

       -d, -dd, -ddd
              Increase the amount of printed  debug  messages.  -d  adds  some
              verbosity, while -ddd results in very detailed output.

              Set  the  debug  level  mask  to ’debug_level’. This a bitmasked
              value  with  the  following  classes:  errors  (1),  info   (2),
              subsystems    (4),    module_names   (8),   user_objects   (16),
              system_objects  32,  functions  (64),   continuous   (128)   and
              eiam_return_values  (256).  Default  is  271  (1+2+4+8+256). See
              sourcode  documentation  for  the  ECA_LOGGER  class  for   more
              detailed information.

       -D     Print  all debug information to stderr (unbuffered, plain output
              without ncurses).

       -q     Quiet mode, no output. Same as -d:0.

              Create a new chainsetup from file ’chainsetup-file’ and  add  it
              to  the current session. Chainsetup can contain inputs, outputs,
              chains, effects, controllers, etc. A session, on the other hand,
              contains  all  the chainsetups. Although only one chainsetup can
              be connected at a time, you can switch between them  on-the-fly.

              Enable ecasound’s daemon mode. If this option is given, ecasound
              will allow clients to connect to the  running  ecasound  session
              using a TCP/IP network connection.  The clients can both observe
              and control the session.

              Warning! As there is no access control implemented, be  sure  to
              block  ecasound’s  port  in your firewall if the machine running
              ecasound is connected to a public network! Otherwise anyone  can
              connect to your ecasound sessions.

              Set  the  TCP  port used by the daemon mode. By default ecasound
              will use port number 2868.

              Disable ecasound’s daemon mode. This is the default.

              Do not exit when processing is  finished/stopped.  Only  affects
              non-interactive  operating  mode  (see  -c/-C).  Option added to
              ecasound 2.4.2.

              Show this help.

              Print version info.


       -a:chainname1, chainname2, ...
              Selects active signal chains. All inputs and  outputs  following
              this ’-a’ option are assigned to selected chains (until a new -a
              option is specified). When adding effects, controllers and other
              chain operators, only one chain can be selected at a time. If no
              -a option has been given, chain ’default’ is used  instead  when
              adding  objects.   Chain  name  ’all’  is also reserved. It will
              cause all existing chains to be selected. By giving multiple  -a
              options,  you  can  control  to which chains effects, inputs and
              outputs are assigned to. Look at the EXAMPLES section  for  more
              detailed info about the usage of this option.

              Sets  the  name  of  chainsetup  to  ’name’.  If  not specified,
              defaults either to "command-line-setup" or to the file name from
              which chainsetup was loaded. Whitespaces are not allowed.

       -x     Truncate  outputs.  All  output  object  are opened in overwrite
              mode.  Any existing files will be truncated.

       -X     Open outputs for updating.  Ecasound  opens  all  outputs  -  if
              target format allows it - in readwrite mode.

              Enables  ’feature’. Most features can be disabled using notation
              -z:nofeature. ’-z:db,dbsize’ enables double-buffering for  audio
              objects  that support it (dbsize=0 for default, otherwise buffer
              size in sample  frames).  ’-z:nodb’  disables  double-buffering.
              ’-z:intbuf’  and  ’-z:nointbuf’  control  whether extra internal
              buffering is allowed for realtime devices.  Disabling  this  can
              reduce  latency  times  in  some  situations.  With  ’-z:xruns’,
              processing  will  be  halted   if   an   under/overrun   occurs.
              ’-z:multitrack’  and  ’z:nomultitrack’  can  be  used  to  force
              ecasound to enable or disable multitrack-mode. In rare cases you
              may  want  to  explicitly  specify  the  recording  offset  with
              ’-z:multitrack,offset-in-samples’. The offset is the  amount  of
              samples  skipped  when recording from real-time inputs. ’-z:psr’
              enables   the   precise-sample-rates   mode   for   OSS-devices.
              ’-z:mixmode,sum’ enables mixing mode where channels are mixed by
              summing all channels. The default is ’-z:mixmode,avg’, in  which
              channels  are  mixed  by  averaging. Mixmode selection was first
              added to ecasound 2.4.0.  See ecasoundrc(5).


              Selects the default buffering  mode.  Mode  is  one  of:  ’auto’
              (default), ’nonrt’, ’rt’, ’rtlowlatency’.

       -b:buffer size
              Sets  the  size of buffer in samples (must be an exponent of 2).
              This is quite an important option. For real-time processing, you
              should  set  this  as  low  as possible to reduce the processing
              delay. Some machines can handle buffer values as low as  64  and
              128.  In  some circumstances (for instance when using oscillator
              envelopes) small buffer  sizes  will  make  envelopes  act  more
              smoothly.  When  not  processing  in  real-time  (all inputs and
              outputs are normal files), values between 512 - 4096 often  give
              better results. Default is 1024.

              Use  realtime scheduling policy (SCHED_FIFO). This is impossible
              if ecasound doesn’t have root priviledges.  Beware!  This  gives
              better  performance,  but  can cause total lock-ups if something
              goes wrong.  The ’sched_priority’ can be omitted (0=omitted). If
              given,  this  is  the  static  priority  to the highest priority
              ecasound thread.   Other  ecasound  threads  run  with  priority
              ’sched_priority-1...n’.   Value  ’-1’  can  be  used  to disable
              raised-priority mode.

              Relevant  features  are  -z:db,xxx   (-z:nodb)   and   -z:intbuf
              (-z:nointbuf).   See  section  General  chainsetup  options  for


              Sets processing time in seconds (doesn’t have to be  an  integer
              value).   If  processing  time  isn’t set, engine stops when all
              inputs are finished. This option is equivalent to  the  ’cs-set-
              length’  EIAM command. A special-case value of ’-1’ will set the
              chainsetup length according to the longest input object.

       -tl    Enables looping. When processing is finished, engine will  start
              again from beginning. This option is equivalent to the ’cs-loop’
              EIAM command.

              INPUT/OUTPUT SETUP

       See ecasound user’s guide for more detailed documentation.

              Sets options for  audio  object  manager  type  ’mgrtype’.   For
              available options, see "OBJECT TYPE SPECIFIC NOTES" below.

              Sets  default  sampling  parameters.  These  are  used  for  all
              following  input  and  output  files  or  until  another  -f  is
              specified.  If  no  -f  option is present, ecasound will use the
              default audio parameters (see ecasoundrc(5)  man  page).  Notice
              that  when  opening  existing audio objects, either for input or
              output, the default audio parameters set with -f are ignored  if
              objects  provide  sufficient  header information (as is the case
              for wav, aiff, etc formats). For output objects, the  -x  option
              can  be  used  to  completely overwrite existing files (in other
              words, with -x, default audio parameters set with -f are  used).

              Sample format is given as a a formatted string. The first letter
              is either "u", "s" and "f" (unsigned, signed,  floating  point).
              The following number specifies sample size in bits. If sample is
              little endian, "_le" is added  to  the  end.  Similarly  if  big
              endian,  "_be"  is  added.  If  endianess is not specified, host
              byte-order is used.  Currently supported formats are "u8"  (same
              as  "8"), "s16_le" (same as "16"), "s16_be", "s24_le", "s24_be",
              "s32_le", "s32_be", "f32_le" and "f32_be".

              The 4th parameter ’interleaving’ should either be ’i’  (default)
              for interleaved stream format, or ’n’ for noninterleaved.

              Sets  starting  position for last specified input/output. If you
              need more flexible control over audio objects,  you  should  use
              the .ewf format.

              Specifies  a  new input source that is connected to all selected
              chains.  Connecting multiple inputs  to  the  same  chain  isn’t
              possible.  Input  can  be  a  a file, device or some other audio
              object (see below).  If  the  input  is  a  file,  its  type  is
              determined  using  the  file  name extension. If the object name
              contains any commas, the name must be enclosed in backquotes  to
              avoid confusing the parser. Currently supported formats are RIFF
              WAVE files (.wav), audio-cd tracks  (.cdr),  ecasound  ewf-files
              (.ewf),  RAW audio data (.raw) and MPEG files (.mp2,.mp3). Also,
              formats supported by the SGI  audiofile  library:  AIFF  (.aiff,
              .aifc,  .aif)  and  Sun/NeXT  audio files (.au, .snd). MikMod is
              also supported (.xm, .mod, .s3m, .it, etc).  MIDI  files  (.mid)
              are  supported using Timidity++. Similarly Ogg Vorbis (.ogg) can
              be read and written if ogg123 and vorbize tools  are  installed,
              FLAC  files  (.flac)  with  flac  command-line  tools  or  using
              libsndfile,  and  AAC  files  (.aac/.m4a/.mp4)  with  faad2/faac
              tools.   Supported   realtime  devices  are  OSS  audio  devices
              (/dev/dsp*), ALSA audio and  loopback  devices  and  JACK  audio
              subsystem.  If  no  inputs  are  specified, the first non-option
              (doesn’t start with ’-’) command line argument is considered  to
              be an input.

              Works  in  the  same  way  as  the  -i option. If no outputs are
              specified,   the   default   output   device   is   used    (see
              ~/.ecasoundrc). If the object name contains any commas, the name
              must be enclosed in backquotes to avoid  confusing  the  parser.
              Note,  you  can’t  output  to module formats supported by MikMod
              (this should be obvious).


       ALSA devices
              When using ALSA drivers, instead of a device filename, you  need
              to use the following option syntax: -i[:]alsa,pcm_device_name.

       ALSA direct-hw and plugin access
              It’s also possible to use a specific card and device combination
              using            the             following             notation:
              -i[:]alsahw,card_number,device_number,subdevice_number.  Another
              option is the ALSA PCM plugin layer.  It  works  just  like  the
              normal  ALSA  pcm-devices,  but with automatic channel count and
              sample     format     conversions.     Option     syntax      is

       aRts input/output
              If  enabled  at  compile-time, ecasound supports audio input and
              output using  aRts  audio  server.  Option  syntax  is  -i:arts,

       Ecasound Wave Files - .ewf
              A  simple  wrapper  class for handling other audio objects.  See
              ecasound user’s guide for more detailed information.

       JACK input/outputs
              JACK is a low-latency audio server that can be used  to  connect
              multiple  independent  audio  application  to each other.  It is
              different from other audio server efforts in that  it  has  been
              designed  from  the  ground  up  to  be suitable for low-latency
              professional audio work.

              Ecasound  provides  multiple  ways  to  communicate  with   JACK
              servers.  To  directly  input  or  output  to  soundcard, use -i
              jack_alsa and -o jack_alsa. To communicate with other apps,  use
              jack_auto,remote_clientname. To just create ports without making
              any    automatic    connections,    there    are    jack     and

              Additionally    global   JACK   options   can   be   set   using
              -G:jack,client_name,operation_mode. ’client_name’  is  the  name
              used   when   registering  ecasound  to  the  JACK  system.   If
              ’operation_mode’ is "notransport",   ecasound  will  ignore  any
              transport  state  changes  in the JACK-system; in mode "send" it
              will send all start, stop and position-change  events  to  other
              JACK  clients;  in  mode "recv" ecasound will follow JACK start,
              stop  and  position-change  events;  and  mode  "sendrecv"  (the
              default) which is a combination of the two previous modes.

              More  details  about  ecasound’s  JACK support can be found from
              ecasound user’s guide.

              If libaudiofile support was enabled at compile-time, this option
              allows   you   to   force   Ecasound  to  use  libaudiofile  for
              reading/writing  a  certain  audio  file.   Option   syntax   is
              -i:audiofile,foobar.ext (same for -o).

              If  libsndfile  support was enabled at compile-time, this option
              allows  you  to   force   Ecasound   to   use   libsndfile   for
              reading/writing   a   certain   audio  file.  Option  syntax  is
              -i:sndfile,foobar.ext[,.format-ext] (same for -o).  The optional
              third  parameter  "format"  can  be  used  to override the audio
              format (for example you can create an AIFF  file  with  filename

       Loop device
              Loop  devices  make  it  possible  to route data between chains.
              Option syntax is  -[io][:]loop,id_number.  If  you  add  a  loop
              output with id ’1’, all data written to this output is routed to
              all loop inputs with id ’1’. You can attach the same loop device
              to multiple inputs and outputs.

       Mikmod If  mikmod  support  was  enabled  at  compile-time, this option
              allows you to force Ecasound to use Mikmod for reading/writing a
              certain module file. Option syntax is -i:mikmod,foobar.ext.

       Null inputs/outputs
              If  you  specify "null" or "/dev/null" as the input or output, a
              null audio device is created. This is useful if you just want to
              analyze sample data without writing it to a file. There’s also a
              realtime variant,  "rtnull",  which  behaves  just  like  "null"
              objects, except all i/o is done at realtime speed.

       Resample - access object of different sample rates
              Object  type  ’resample’  can be used to resample audio object’s
              audio data to  match  the  sampling  rate  used  in  the  active
              chainsetup.    For    example,    ecasound    -f:16,2,44100   -i
              resample,22050,foo.wav -o  /dev/dsp,  will  resample  file  from
              22.05kHz  to  44.1kHz  and  write  the  result  to the soundcard
              device. Child sampling rate can be replaced with keyword ’auto’.
              In this case ecasound will try to query the child object for its
              sampling rate. This works with files formats such as .wav  which
              store  meta  information  about  the  audio  file format. To use
              ’auto’  in  the  previous  example,  ecasound  -f:16,2,44100  -i
              resample,auto,foo.wav -o /dev/dsp.

              If ecasound was compiled with support for libsamplerate, you can
              use  ’resample-hq’  to  use  the  highest   quality   resampling
              algorithm  available.  To  force  ecasound  to  use the internal
              resampler, ’resampler-lq’ (low-quality) can be used.

       Reverse - process audio data backwards
              Object type ’reverse’ can be used to reverse audio  data  coming
              from an audio object. As an example, ecasound -i reverse,foo.wav
              -o /dev/dsp will  play  ’foo.wav’  backwards.  Reversing  output
              objects  is  not supported. Note! Trying to reverse audio object
              types  with  really  slow  seek  operation  (like  mp3),   works
              extremely  badly.  Try converting to an uncompressed format (wav
              or raw) first, and then do reversation.

       System standard streams and named pipes
              You can use standard streams (stdin and stdout) by giving  stdin
              or  stdout  as  the  file  name.  Audio data is assumed to be in
              raw/headerless (.raw) format. If you want to  use  named  pipes,
              create them with the proper file name extension before use.

       Typeselect - overriding object type settings
              The special ’typeselect’ object type can be used to override how
              ecasound maps filename extensions and object types. For instance
              ecasound  -i typeselect,.mp3,an_mp3_file.wav -o /dev/dsp.  would
              play the file ’an_mp3_file.wav’ as an mp3-file  and  not  as  an
              wav-file as would happen without typeselect.

              MIDI SETUP

       MIDI I/O devices - general
              If  no MIDI-device is specified, the default MIDI-device is used
              (see ecasoundrc(5)).

              Add a rawmidi MIDI I/O device to the setup. ’device_name’ can be
              anything  that  can  be  accessed  using  the  normal  UNIX file
              operations and produces raw MIDI bytes. Valid  devices  are  for
              example  OSS rawmidi devices (/dev/midi00), ALSA rawmidi devices
              (/dev/snd/midiC2D0), named pipes (see mkfifo(1) man  page),  and
              normal files.

              Adds  a  ALSA MIDI sequencer port to the setup. ’sequencer-port’
              identifies a port to connect  to.  It  can  be  numerical  (e.g.
              128:1), or a client name (e.g. "KMidimon").

              Sends MMC start and stop to MIDI device-id ’device_id’.

       -Mss   Sends MIDI-sync to the selected MIDI-device. Note! Ecasound will
              not send MIDI-clock, but only start and stop messages.

              EFFECT SETUP


       Ecasound has a powerful effect preset system that allows you create new
       effects by combining basic effects and controllers. See ecasound user’s
       guide for more detailed information.

              Uses the first preset found from  file  ’preset_file.eep’  as  a
              chain operator.

              Find preset ’preset_name’ from global preset database and use it
              as a chain operator. See ecasoundrc(5) for info about the preset

              SIGNAL ANALYSIS

       -ev    Analyzes  sample  data  to  find  out how much the signal can be
              amplified without clipping. The resulting percent value  can  be
              used  as  a  parameter  to  -ea  and -eas effects. Also prints a
              statistics table containing  info  about  stereo-image  and  how
              different sample values are used.

       -evp   Peak  amplitude  watcher.  Maintains  peak  information for each
              processed channels. Peak information is resetted on every  read.

       -ezf   Finds the optimal value for DC-adjusting. You can use the result
              as a parameter to -ezx effect.


              Audio stamp. Takes a snapshot of passing audio data  and  stores
              it  using id ’stamp-id’ (integer number). This data can later be
              used by controllers and other operators.

              Amplifies signal by amplify-% percent.

              Amplifies signal of  channel  ’channel’  by  amplify-%  percent.
              ’channel’  ranges  from  1...n  where  n  is the total number of

              Amplifies signal by amplify-% percent. If number of  consecutive
              clipped  samples  (resulting  sample  has  the largest amplitude
              possible)  reaches  ’max-clipped-samples’,  a  warning  will  be

              Limiter effect. Limits audio level to ’limit-%’.

              Compressor  (a  simple  one).  ’rate’ is the compression rate in
              decibels (’rate’ dB change in input signal causes 1dB change  in
              output).  ’threshold’  varies between 0.0 (silence) and 1.0 (max

       -eca:peak-level-%, release-time-sec, fast-crate, crate
              A more  advanced  compressor  (original  algorithm  by  John  S.
              Dyson).   If you give a value of 0 to any parameter, the default
              is used.  ’peak-level-%’ essentially specifies how hard the peak
              limiter  is  pushed.  The default of 69% is good. ’release_time’
              is given in seconds. This compressor is very sophisticated,  and
              actually  the  release  time  is  complex.   This  is one of the
              dominant release time controls, but the actual release  time  is
              dependent  on  a  lot  of  factors regarding the dynamics of the
              audio in. ’fastrate’ is  the  compression  ratio  for  the  fast
              compressor.  This is not really the compression ratio.  Value of
              1.0 is infinity to one, while the default 0.50 is 2:1.   Another
              really good value is special cased in the code: 0.25 is somewhat
              less  than  2:1,  and  sounds  super  smooth.   ’rate’  is   the
              compression  ratio for the entire compressor chain.  The default
              is 1.0, and holds the volume very constant  without  many  nasty
              side  effects.   However  the  dynamics  in  music  are severely
              restricted, and a value of 0.5 might keep the music more intact.

              Noise  gate.  Supports  multichannel  processing  (each  channel
              processed  separately).  When  signal  amplitude   falls   below
              ’threshold_level_%’ percent (100% means maximum amplitude), gate
              is activated. If  the  signal  stays  below  the  threshold  for
              ’th_time’ ms, it’s faded out during the attack phase of ’attack’
              ms. If the signal raises above the ’threshold_level’  and  stays
              there over ’hold’ ms the gate is released during ’release’ ms.

              Pitch shifter. Modifies audio pitch by altering its length.

              Stereo  panner.  Changes  the relative balance between the first
              two channels. When ’right-%’ is 0, only signal on the left (1st)
              channel  is passed through. Similarly if it is ’100’, only right
              (2nd) channel is let through.

              Adjusts the signal DC by ’delta-chX’, where  X  is  the  channel
              number. Use -ezf to find the optimal delta values.


              Pulse gate (pulse frequency given as beats-per-minute).

              Pulse gate.

              Tremolo effect (tremolo speed given as beats-per-minute).

              FILTER EFFECTS

       -ef1:center_freq, width
              Resonant bandpass filter. ’center_freq’ is the center frequency.
              Width is specified in Hz.

       -ef3:cutoff_freq, reso, gain
              Resonant lowpass filter. ’cutoffr_freq’  is  the  filter  cutoff
              frequency.  ’reso’  means resonance. Usually the best values for
              resonance are between 1.0 and 2.0, but you can use  even  bigger
              values.   ’gain’  is  the  overall  gain-factor.  It’s  a simple
              multiplier (1.0 is the normal level). With high resonance values
              it often is useful to reduce the gain value.

       -ef4:cutoff, resonance
              Resonant  lowpass filter (3rd-order, 36dB, original algorithm by
              Stefan M. Fendt). Simulates an analog active RC-lowpass  design.
              Cutoff  is  a  value  between  [0,1], while resonance is between

              Allpass  filter.  Passes  all  frequencies  with  no  change  in
              amplitude.   However,  at  the same time it imposes a frequency-
              dependent phase-shift.

              Comb filter. Allows the spikes of  the  comb  to  pass  through.
              Value of ’radius’ should be between [0, 1.0).

              Bandpass filter. ’center_freq’ is the center frequency. Width is
              specified in Hz.

              Highpass filter. Only frequencies above ’cutoff_freq’ are passed

              Inverse  comb  filter. Filters out the spikes of the comb. There
              are ’delay_in_samples-2’ spikes. Value  of  ’radius’  should  be
              between  [0,  1.0).  The  closer it is to the maximum value, the
              deeper the dips of the comb are.

              Lowpass filter. Only frequencies below ’cutoff_freq’ are  passed

              Bandreject  filter. ’center_freq’ is the center frequency. Width
              is specified in Hz.

              Resonator. ’center_freq’  is  the  center  frequency.  Width  is
              specified  in  Hz.  Basicly  just  another  resonating  bandpass


       -chcopy:from-channel, to-channel
              Copy channel ’from_channel’  to  ’to_channel’.  If  ’to_channel’
              doesn’t  exist,  it  is created. Channel indexing starts from 1.
              Option added to ecasound 2.4.5.

       -chmove:from-channel, to-channel
              Copy channel  ’from_channel’  to  ’to_channel’,  and  mutes  the
              source  channel  ’from_channel’. Channel indexing starts from 1.
              Option added to ecasound 2.4.5.

              Mix all  channels  to  channel  ’to_channel’.   If  ’to_channel’
              doesn’t  exist,  it  is created. Channel indexing starts from 1.
              Option added to ecasound 2.4.5.

              Mutes the channel ’channel’. Channel  indexing  starts  from  1.
              Option added to ecasound 2.4.5.

              dir(-erc:from-channel,to-channel) Deprecated, see -chcopy.

              Deprecated, see -chmix.

              TIME-BASED EFFECTS


              Delay  effect.  ’delay  time’ is the delay time in milliseconds.
              ’surround-mode’ is  a  integer  with  following  meanings:  0  =
              normal,  1  =  surround,  2  = stereo-spread. ’number_of_delays’
              should be obvious. Beware that large number of delays  and  huge
              delay times need a lot of CPU power. ’mix-%’ determines how much
              effected (wet) signal is mixed  to  the  original.  ’feedback-%’
              represents  how much of the signal is recycled in each delay or,
              if you prefer, at what rate  the  repeated  snippet  of  delayed
              audio  fades.  Note  that  sufficiently  low feedback values may
              result in a number of audible repetitions lesser than  what  you
              have  specified  for  ’number_of_delays’, especially if you have
              set a low value for ’mix-%’.  By  default  the  value  for  this
              parameter is 100% (No signal loss.).

              A  more  advanced reverb effect (original algorithm by Stefan M.
              Fendt).  ’room_size’ is given in  meters,  ’feedback-%’  is  the
              feedback  level  given  in percents and ’wet-%’ is the amount of
              reverbed signal added to the original signal.

              Fake-stereo effect. The input signal  is  summed  to  mono.  The
              original  signal  goes  to  the  left  channels  while a delayed
              version (with delay of ’delay time’ milliseconds) is goes to the
              right.  With  a  delay  time  of  1-40  milliseconds this adds a
              stereo-feel to mono-signals.


              Multitap delay. ’delay time’ is the delay time in  milliseconds.
              ’number_of_delays’  should  be  obvious.  ’mix-%’ determines how
              much effected (wet) signal is mixed to the original.


              Reverb effect. ’delay time’ is the delay time  in  milliseconds.
              If  ’surround-mode’  is ’surround’, reverbed signal moves around
              the stereo image.  ’feedback-%’  determines  how  much  effected
              (wet) signal is fed back to the reverb.


              Ecasound supports LADSPA-effect plugins (Linux Audio Developer’s
              Simple Plugin API). Plugins are located in shared library  (.so)
              files  in /usr/local/share/ladspa (configured in ecasoundrc(5)).
              One shared library file can contain multiple plugin objects, but
              every  plugin  has  a  unique plugin name. This name is used for
              selecting plugins.  See LAD mailing list web site for more  info
              about LADSPA. Other useful sites are LADSPA home page and LADSPA

              Same as above expect plugin’s unique id-number is  used.  It  is
              guaranteed  that  these  id-numbers  are unique among all LADSPA

              GATE SETUP

              Time crop gate. Initially gate  is  closed.  After  ’start-time’
              seconds  has  elapsed,  gate  opens  and  remains open for ’len’
              seconds. When closed, passing audio buffers are trucated to zero

       -ge:open-threshold-%, close-thold-%,volume-mode
              Threshold  gate.  Initially  gate  is  closed. It is opened when
              volume goes over ’othreshold’ percent.  After  this,  if  volume
              drops below ’cthold’ percent, gate is closed and won’t be opened
              again.  If ’value_mode’ is ’rms’, average RMS  volume  is  used.
              Otherwise  peak  average  is  used.   When closed, passing audio
              buffers are trucated to zero length.


              Controllers can be used to dynamically change effect  parameters
              during  processing. All controllers are attached to the selected
              (=usually the  last  specified  effect/controller)  effect.  The
              first   three   parameters   are  common  for  all  controllers.
              ’fx_param’ specifies the parameter to be controlled.  Value  ’1’
              means   the   first   parameter,  ’2’  the  second  and  so  on.
              ’start_value’ and ’end_value’ set the value range. For examples,
              look at the the EXAMPLES section.

              Sine oscillator with frequency of ’freq’ Hz and initial phase of
              ’i_phase’ times pi.

              Generic oscillator. Frequency ’freq’ Hz,  mode  either  ’0’  for
              static  values  or  ’1’  for linear interpolation. ’point-pairs’
              specifies the number of ’posN’  -  ’valueN’  pairs  to  include.
              ’start-value’  and  ’end-value’  are used as border values.  All
              ’posN’ and ’valueN’ must be between 0.0 and 1.0. Also,  for  all
              ’posN’ values ’pos1 < pos2 < ... < posN’ must be true.

              Generic   oscillator.  ’genosc_number’  is  the  number  of  the
              oscillator preset to be loaded. Mode is either  ’0’  for  static
              values  or  ’1’  for  linear interpolation. The location for the
              preset file is taken from ./ecasoundrc (see ecasoundrc(5)).

              Linear envelope that  starts  from  ’start_value’  and  linearly
              changes to ’end_value’ during ’time_in_seconds’. Can be used for
              fadeins and fadeouts.

              Two-stage linear envelope, a more versatile tool for doing fade-
              ins and fade-outs. Stays at ’start_value’ for ’1st_stage_length’
              seconds and then linearly  changes  towards  ’end_value’  during
              ’2nd_stage_length’ seconds.

              Generic  linear  envelope. This controller source can be used to
              map custom envelopes to chain operator parameters.   All  ’posX’
              parameters  are  given  as  seconds  (from start of the stream).
              ’valueX’ parameters  must be in the range [0,1].

              MIDI continuous controller (control change messages).   Messages
              on  the  MIDI-channel  ’channel’ that are coming from controller
              number ’controller’  are  used  as  the  controller  source.  As
              recommended  by  the  MIDI-specification, channel numbering goes
              from 1 to 16. Possible controller numbers are values from  0  to
              127.  The MIDI-device where bytes are read from can be specified
              using -Md option.  Otherwise the default MIDI-device is used  as
              specified in ~ecasound/ecasoundrc (see ecasoundrc(5)).  Defaults
              to /dev/midi.

              Volume analyze controller. Analyzes the audio  stored  in  stamp
              ’stamp-id’  (see  ’-eS:id’ docs), and creates control data based
              on the results. If ’rms-toggle’ is non-zero, RMS-volume is  used
              to calculate the control value. Otherwise average peak-amplitude
              is used.

       -kx    This is a special switch that can  be  used  when  you  need  to
              control controller parameters with another controller.  When you
              specify -kx, the last specified controller will be  set  as  the
              control target. Then you just add another controller as usual.


       See ecasound-iam(1).


              If  defined,  some  utility  programs  and  scripts will use the
              ECASOUND environment as the default path to ecasound executable.

              Output  all  debugging  messages  to  a  separate  log  file. If
              defined, ECASOUND_LOGFILE defines the logfile path.  This  is  a
              good tool for debugging ECI/EIAM scripts and applications.

              Select  which  messages  are  written  to the logfile defined by
              ECASOUND_LOGFILE. The  syntax  for  -d:level  is  used.  If  not
              defined,   all   messages   are   written.  Defaults  to  -d:319
              (everything else but ’functions(64)’ and ’continuous(128)’ class


       In interactive mode, ecasound always returns zero.

       In  non-interactive  (batch) mode, a non-zero value is returned for the
       following errors:

       1      Unable to create a valid chainsetup with the  given  parameters.
              Can be caused by invalid option syntax, etc.

       2      Unable  to  start processing. This can be caused by insufficient
              file permissions, inability to  access  some  system  resources,

       3      Error  during processing. Possible causes: output object has run
              out of free disk space, etc.


              ~/.ecasound The default directory  for  ecasound  user  resource
              files.  See the ecasoundrc(5) man page.

              *.ecs Ecasound Chainsetup files. Syntax is more or less the same
              as with command-line arguments.

              *.ecp Ecasound Chain Preset files. Used for storing  effect  and
              chain  operator  presets.  See  ecasound  user’s  guide for more
              better documentation.

              *.ews Ecasound  Wave  Stats.  These  files  are  used  to  cache
              waveform data.


              Examples  of  how  to  perform common tasks with ecasound can be
              found at


              ecatools(1), ecasound-iam(1) ecasoundrc(5), "HTML  docs  in  the
              Documentation subdirectory"


              See  file BUGS. If ecasound behaves weirdly, try to increase the
              debug level to see what’s going on.


              Kai Vehmanen, <kvehmanen -at- eca -dot- cx <kvehmanen  -at-  eca
              -dot- cx>>

                                  06.12.2006                       ecasound(1)