[Pkg-octave-devel] Re: Bug#408268: marked as done (octave2.9-forge: wavwrite writes invalid WAV files)

[Rafael Laboissiere]

* Thomas Weber <thomas.weber.mail at gmail.com> [2007-02-04 20:44]:

> Hi, 
> 
> Am Sonntag, den 04.02.2007, 10:48 -0800 schrieb Debian Bug Tracking
> System:
> > > According to the documentation:
> > > 
> > > octave2.9:1> help wavwrite
> > >  -- Function File:  wavwrite(FILENAME, Y)
> > >      Write Y to the canonical RIFF/WAVE sound file FILENAME. A sample
> > >      rate of 8000 Hz and 16-bit samples are assumed. Each column of the
> > >      data represents a separate channel.
> > > 
> > > your input matrix must be organized in columns.  The following code should
> > > do what you want:
> > > 
> > > x = randn(65536, 1);
> > > wavwrite('noise.wav', x)
> > > 
> > > I am therefore closing this bug report.
> 
> Eh, in that case a file with only one channel should be written,
> shouldn't it?

Indeed:

$ octave2.9 -q
octave2.9:1> wavwrite('noise.wav', randn(65536,1));
warning: wavwrite: sample rate set to 8000 Hz
warning: wavwrite: sample resolution set to 16-bit
octave2.9:2> exit
$ file noise.wav
noise.wav: RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, mono 8000 Hz
$ ls -l noise.wav
-rw-r--r-- 1 rafael rafael 131116 2007-02-04 21:10 noise.wav



-- 
Rafael