ch_track(1) [debian man page]

CH_TRACK(1)						    BSD General Commands Manual 					       CH_TRACK(1)

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 sup-
		 ported 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 num-
		 bers 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 cal-
		 culation 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)

Edinburgh Speech Tools						   April 5, 2001					    Edinburgh Speech Tools

NA_PLAY(1)						    BSD General Commands Manual 						NA_PLAY(1)

NAME

     na_record -- play waveform files on audio device

SYNOPSIS

     na_play [-h] [-itype type] [-n channels] [-f sample rate] [-ibo byteorder] [-iswap] [-istype type] [-c channel] [-start time] [-end time]
	     [-from sample] [-to sample] [-p protocol] [-command command] [-basic] [-quality high | low] [-server host] [-scale scale] [-v]
	     [-wait] input files ...

DESCRIPTION

     na_play plays digital audio data to the system's audio input device from the specified file(s).  It supports a variety of file formats and
     native audio devices.

     The following option flags are recognized:

	   -h	 Prints a short summary of usage to standard output.
	   -itype type
		 Input file type.  Usually, the input type can be determined from the file's headers, so this option is not required except for
		 raw (unheadered) data.  Supported types are currently: nist, est, esps, snd, riff, aiff, audlab, raw, ascii.
	   -n channels
		 Number of channels, in an unheadered input file.  Again, this can usually be determined from the headers.  Default is 1.
	   -f sampling rate
		 Sampling rate, for an unheadered input file.  Default is 16000.
	   -ibo byte order
		 Byte order, for an unheadered input file.  Default is system byte order.  Recognized values are: MSB, LSB, native, nonnative.
	   -iswap
		 Swap bytes in an unheadered input file.
	   -istype type
		 Sample type for an unheadered input file.  Recognized values are: short, mulaw, byte, ascii.
	   -c channel
		 Select a single channel (starting at 0) for playback.	This option plays only the specified channel and discards all others.
	   -start time
		 Select a subsection of the file, starting at this time (specified in seconds).
	   -end time
		 Select a subsection of the file, ending at this time (specified in seconds).
	   -from sample
		 Select a subsection of the file, starting at this offset (specified in number of samples).
	   -to sample
		 Select a subsection of the file, ending at this offset (specified in number of samples).
	   -p protocol
		 Use the specified audio device protocol.  The list of supported types varies between platforms, and can be obtained using the -h
		 flag.
	   -command command
		 If the "audio_command" protocol is specified, this argument must be given to select the command used to play the waveform.  A
		 temporary file is created and passed in the environment variable FILE.  The sample rate is passed in the environment varialbe SR.
	   -basic
		 Treat unheadered input files as 8kHz mu-law data (i.e. audio/basic MIME type)
	   -quality high | low
		 Select the quality of output. "high" will ensure that proper resampling is used.  "low" means to play as fast as possible with a
		 minimum of processor time.
	   -server host
		 Specifies the host to play sound on, when using a network-aware audio protocol (such as NAS)
	   -scale scale
		 Change the gain (volume) of the signal.  The argument is a number relative to 1.0, which is the default.
	   -v	 Be verbose (i.e. print file names when playing)
	   -wait
		 Pause for a keystroke between each file.

ENVIRONMENT

	   NA_PLAY_PROTOCOL
		 Audio protocol to use (as in the -p flag)
	   NA_PLAY_COMMAND
		 Command used to play audio when using the audio_command protocol.
	   NA_PLAY_HOST
		 Host to play audio on when using a network audio protocol.
	   NA_PLAY_QUALITY
		 Playback quality (low or high)

EXAMPLES

     To play the section of foo.wav from 1.5 to 3.2 seconds:
	   $ na_play -start 1.5 -end 3.2 foo.wav
     To play samples 3600 to 42000 of channel 1 of bar.wav:
	   $ na_play -from 3600 -to 4200 -c 1 foo.wav

BUGS

     The usage information isn't entirely correct. The audio_command protocol generates temporary files insecurely.

SEE ALSO

     na_record(1)

Edinburgh Speech Tools						   April 4, 2001					    Edinburgh Speech Tools