NAME

     ch_track — change/copy track file

SYNOPSIS

     ch_track [-h] [-itype file type] [-ctype contour type] [-s frame spacing] [-c channels] [-start time]
              [-end time] [-from frame] [-to frame] [-o file] [-otype file type] [-S frame spacing] [-info]
              [-track_names file] [-diff] [-delta length] [-sm time] [-smtype median | mean] [-style style]
              [-t threshold] [-neg label] [-pos label] [-pc longest | first] input file

DESCRIPTION

     ch_track copies an input track file to an output track file, optionally performing various operations along
     the way.

     The following option flags are recognized:

           -h    Print a short summary of options to standard output.
           -itype file type
                 Input file type (optional). If no type is specified, type is automatically derived from the
                 input file's header. The list of supported types may depend on your particular Speech Tools
                 installation. For a full listing, see the output of the -h option.
           -ctype F0 | track
                 Contour type, either F0 (fundamental frequency) or track.
           -s time
                 Frame spacing of input in seconds, for unheadered input file.
           -c channels
                 Select a subset of channels (starting from 0). Tracks can have multiple channels.  This option
                 specifies a list of channel numbers which are to be used for processing.
           -start time
                 Extract track starting at this time, specified in seconds.
           -end time
                 Extract track ending at this time, specified in seconds.
           -from frame
                 Extract track starting at this offset, specified in frames.
           -to frame
                 Extract track ending at this offset, specified in frames.
           -o file
                 Filename to write output to.  Defaults to standard output.
           -otype file type
                 Output file type. If unspecified, ascii is assumed. For the full list of supported types, see
                 the output of the -h option.
           -S time
                 Frame spacing of output in seconds. If this is different from the input spacing, the contour
                 will be resampled.
           -info
                 Print information about the input file and its headers. This option gives useful information
                 such as file length, file type, and channel names. No other actions are taken, and no output
                 file produced.
           -track_names file
                 File containing new names for output channels
           -diff
                 Differentiate contour. This performs simple numerical differentiation on the contour by
                 subtracting the amplitude of the current frame from the amplitude of the next.  Although quick,
                 this technique is crude and not recommended as the estimation of the derivate is done on only
                 one point.
           -delta length
                 Make delta coefficients (better form of differentiation). The argument to this option is the
                 regression length of the delta calculation and can be between 2 and 4.
           -sm time
                 Length of smoothing window in seconds. Various types of smoothing are available for tracks.
                 This option specifies length of the smoothing window which affects the degree of smoothing,
                 i.e. a longer value means more smoothing.
           -smtype median | mean
                 Type of smoothing.
           -style style
                 Convert track to another form.  Currently only one form, "label", is supported.  This uses a
                 specified cutoff to make a label file, with two labels, one for above the cutoff (see the -pos
                 option), and one for below (see the -neg option).
           -t threshold
                 Threshold for track to label conversion.
           -neg label
                 Name of negative label in track to label conversion.
           -pos label
                 Name of positive label in track to label conversion.
           -pc longest | first
                 Combind given tracks in parallel. If option is "longest", pad shorter tracks to longest, else
                 if "first", pad or cut them as appropriate to match the length of the first input track.

SEE ALSO

     ch_lab(1) ch_utt(1)