RECWAVE(1) General Commands Manual RECWAVE(1)NAME
recwave - record an audio file in MicroSoft PCM wave format
SYNOPSIS
recwave [-b -s -r] file
DESCRIPTION
Recwav takes samples from /dev/audio and writes them to file in Microsoft PCM wave format.
OPTIONS -b number of bits to use for one sample. Must be 8 or 16, default is 8
-s enable stereo sampling. 0 = mono (default), 1 = stereo
-r sample rate in samples/sec. 4000 - 44100 (default 22050)
BUGS
The highest sample rate that can be used depends on the speed of the system and the size of the DMA buffer used in the driver.
(/usr/src/kernel/sb16.h)
AUTHOR
Michel R. Prevenier (mrpreve@cs.vu.nl)
RECWAVE(1)
Check Out this Related Man Page
SDL_AudioSpec(3) SDL API Reference SDL_AudioSpec(3)NAME
SDL_AudioSpec - Audio Specification Structure
STRUCTURE DEFINITION
typedef struct{
int freq;
Uint16 format;
Uint8 channels;
Uint8 silence;
Uint16 samples;
Uint32 size;
void (*callback)(void *userdata, Uint8 *stream, int len);
void *userdata;
} SDL_AudioSpec;
STRUCTURE DATA
freq Audio frequency in samples per second
format Audio data format
channels Number of channels: 1 mono, 2 stereo
silence Audio buffer silence value (calculated)
samples Audio buffer size in samples
size Audio buffer size in bytes (calculated)
callback(..) Callback function for filling the audio buffer
userdata Pointer the user data which is passed to the callback function
DESCRIPTION
The SDL_AudioSpec structure is used to describe the format of some audio data. This structure is used by SDL_OpenAudio and SDL_LoadWAV.
While all fields are used by SDL_OpenAudio only freq, format, samples and channels are used by SDL_LoadWAV. We will detail these common
members here.
freq The number of samples sent to the sound device every second. Common values are 11025, 22050 and 44100. The higher the
better.
format Specifies the size and type of each sample element
AUDIO_U8
AUDIO_S8
AUDIO_U16 or AUDIO_U16LSB
AUDIO_S16 or AUDIO_S16LSB
AUDIO_U16MSB
AUDIO_S16MSB
AUDIO_U16SYS
AUDIO_S16SYS
channels The number of seperate sound channels. 1 is mono (single channel), 2 is stereo (dual channel).
samples When used with SDL_OpenAudio this refers to the size of the audio buffer in samples. A sample a chunk of audio data of
the size specified in format mulitplied by the number of channels. When the SDL_AudioSpec is used with SDL_LoadWAV sam-
ples is set to 4096.
SEE ALSO
SDL_OpenAudio, SDL_LoadWAV
SDL Tue 11 Sep 2001, 22:58 SDL_AudioSpec(3)
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