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# ch_lab Label file manipulation

## Synopsis

ch_lab [input file1] [input file2] -o [output file] [-h ] [-S `float`] [-base ] [-class `string`] [-combine ] [-divide ] [-end `float`] [-ext `string`] [-extend `float`] [-extract `string`] [-f `int`] [-itype `string`] [-key `string`] [-lablist `string`] [-length `float`] [-lf `int`] [-map `string`] [-name `string`] [-nopath ] [-o `ofile`] [-off `float`] [-ops ] [-otype `string` " {esps}"] [-pad `string`] [-pos `string`] [-q `float`] [-range `float`] [-sed `ifile`] [-shift `float`] [-start `float`] [-style `string`] [-vocab `ifile`] [-verify ]

ch_lab is used to manipulate the format of label files and serves as a wrap-around for the EST_Relation class.

## OPTIONS

> -h | Options help
> -S | `float` frame spacing of output
> -base | use base filenames for lists of label files
> -class | `string` Name of class defined in op file
> -combine |
> -divide |
> -end | `float` end time (secs) for label extraction
> -ext | `string` filename extension
> -extend | `float` extend track file beyond label file
> -extract | `string` extract a single file from a list of label files
> -f | `int` sample frequency of label file
> -itype | `string` type of input label file: esps htk ogi
> -key | `string` key label file
> -lablist | `string` list of labels to be considered as blank
> -length | `float` length of track produced
> -lf | `int` sample frequency for labels
> -map | `string` name of file containing label mapping
> -name | `string` eg. Fo Phoneme
> -nopath | ignore pathnames when searching label lists
> -o | `ofile` output gile name
> -off | `float` vertical offset of track
> -ops | print options
> -otype | `string` " {esps}" output file type: xmg, ascii, esps, htk
> -pad | `string` Pad with "high" or "low" values
> -pos | `string` list of labels to be regarded as 'pos'
> -q | `float` quantize label timings to nearest value
> -range | `float` different between high and low values
> -sed | `ifile` perform regex editing using sed file
> -shift | `float` shift the times of the labels
> -start | `float` start time for label extraction
> -style | `string` output stype e.g. track
> -vocab | `ifile` file containing list of words in vocab
> -verify | check that only labels in vocab file are in label file

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ch_track Track file manipulation | Up | tilt_analysis Produce tilt descriptions from F0 contours