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Diffstat (limited to 'Doc/lib/libaifc.tex')
| -rw-r--r-- | Doc/lib/libaifc.tex | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/Doc/lib/libaifc.tex b/Doc/lib/libaifc.tex index 7e595ef..04ed2e4 100644 --- a/Doc/lib/libaifc.tex +++ b/Doc/lib/libaifc.tex @@ -11,8 +11,14 @@ The sampling rate or frame rate is the number of times per second the sound is sampled. The number of channels indicate if the audio is mono, stereo, or quadro. Each frame consists of one sample per channel. The sample size is the size in bytes of each sample. Thus a -frame consists of \var{nchannels}*\var{framesize} bytes, and a second's worth of -audio consists of \var{nchannels}*\var{framesize}*\var{framerate} bytes. +frame consists of \var{nchannels}*\var{samplesize} bytes, and a +second's worth of audio consists of +\var{nchannels}*\var{samplesize}*\var{framerate} bytes. + +For example, CD quality audio has a sample size of two bytes (16 +bits), uses two channels (stereo) and has a frame rate of 44,100 +frames/second. This gives a frame size of 4 bytes (2*2), and a +second's worth occupies 2*2*44100 bytes, i.e.\ 176,400 bytes. Module \code{aifc} defines the following function: @@ -148,7 +154,7 @@ string. Currently the following compression types are supported: NONE, ULAW, ALAW, G722. \end{funcdesc} -\begin{funcdesc}{setparams}{(nchannels\, sampwidth\, framerate\, comptype\, compname)} +\begin{funcdesc}{setparams}{nchannels\, sampwidth\, framerate\, comptype\, compname} Set all the above parameters at once. The argument is a tuple consisting of the various parameters. This means that it is possible to use the result of a \code{getparams} call as argument to |