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)