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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)