Routine

GenTone [options] AFile

Purpose

Generate an audio file containing a sine wave

Description

This program generates a sine wave of a given amplitude and phase. The samples of the sine wave are written to an audio file. Options are available to specify the number of samples, the sampling frequency and the data format of the output file.

Options

Output file name: AFile:
Specifying "-" as the output file indicates that output is to be written to standard output. If the output file type is not explicitly given (-F option), the extension of the output file name is used to determine the file type.

  ".au"   - AU audio file


  ".wav"  - WAVE file


  ".aif"  - AIFF sound file


  ".afc"  - AIFF-C sound file


  ".raw"  - Headerless file (native byte order)


  ".txt"  - Headerless file (text data)

-f FREQ, --frequency=FREQ
Frequency of the sine wave in Hertz, default 1000. -r SDEV, --rms=SDEV
Root-mean-square value of the sinusoid in normalized units, default 0.03. The rms value can be given as a real number (e.g., "0.03") or as a ratio (e.g., "983.04/32768"). -a AMPL, --amplitude_max=AMPL
Maximum amplitude of the sine wave in normalized units. The amplitude of the sine wave is specified by either the rms value or the maximum amplitude. The amplitude can be given as a real number (e.g., "0.0424") or as a ratio (e.g., "1390.2/32768"). -p PHASE, --phase PHASE
Initial phase of the sinusoid (cosine) in degrees, default 0. Zero phase gives a cosine, -90 degrees gives a sine. -n NSAMPLE, --number_samples=NSAMPLE
Number of output samples to be generated. -s SFREQ, --srate=SFREQ
Sampling frequency for the output audio file, default 8000. -F FTYPE, --file_type=FTYPE
Output file type. If this option is not specified, the file type is determined by the output file name extension.

  "AU" or "au"             - AU audio file


  "WAVE" or "wave"         - WAVE file


  "WAVE-NOEX" or "wave-noex" - WAVE file (no extensible data)


  "AIFF-C" "aiff-c"        - AIFF-C sound file


  "AIFF" or "aiff"         - AIFF sound file


  "noheader" or "noheader_native" - Headerless file (native byte


                             order)


  "noheader_swap"          - Headerless file (byte swapped)


  "noheader_big-endian"    - Headerless file (big-endian byte


                             order)


  "noheader_little-endian" - Headerless file (little-endian byte


                             order)

-D DFORMAT, --data_format=DFORMAT
Data format for the output file, default integer16

  "mu-law8"   - 8-bit mu-law data


  "A-law8"    - 8-bit A-law data


  "unsigned8" - offset-binary 8-bit integer data


  "integer8"  - two's-complement 8-bit integer data


  "integer16" - two's-complement 16-bit integer data


  "integer24" - two's-complement 24-bit integer data


  "integer32" - two's-complement 32-bit integer data


  "float32"   - 32-bit floating-point data


  "float64"   - 64-bit floating-point data


  "text"      - text data

The data formats available depend on the output file type. AU audio files:

  mu-law, A-law, 8/16/24/32-bit integer, 32/64-bit float

WAVE files:

  mu-law, A-law, offset-binary 8-bit integer, 16/24/32-bit integer,


  32/64-bit float

AIFF-C sound files:

  mu-law, A-law, 8/16/24/32-bit integer, 32/64-bit float

AIFF sound files:

  8/16/24/32-bit integer

Headerless files:

  all data formats

-I INFO, --info=INFO
Audio file information string for the output file. -h, --help
Print a list of options and exit. -v, --version
Print the version number and exit.

By default, the output file contains a standard audio file information string.

  Standard Audio File Information:


     date: 1994-01-25 19:19:39 UTC    date


     program: GenTone                 program name

  Record delimiter: Newline character or the two character escape


      sequence "\" + "n".


  Line delimiter: Within records, lines are delimiteded by a carriage


      control character, the two character escape sequence "\" + "r",


      or the two character sequence "\" + newline.

Author / version

P. Kabal / v5r0a 2003-11-06

See Also

AFsp