29 Apr
2009
29 Apr
'09
8:51 a.m.
Say, I need to generate 1 second, 2 ch, given bps and sr wav filled with
(analog) 0.0 except for the only sample in middle with 1.0 value, or some
periodic sequence like { -1.0, -1.0, 1.0, 1.0, -1.0, -1.0, ... }, or something
else which can be described in few lines of C/Java-like language.
What is an appropriate software for such simple tasks?
P.S. I see I can use, say, libsnd and do the work. But, probably, some
enviroment does exist for such exercises :-)
29 Apr
29 Apr
9:20 a.m.
Andrew Gaydenko wrote:
Say, I need to generate 1 second, 2 ch, given bps and
sr wav filled with
(analog) 0.0 except for the only sample in middle with 1.0 value, or some
periodic sequence like { -1.0, -1.0, 1.0, 1.0, -1.0, -1.0, ... }, or something
else which can be described in few lines of C/Java-like language.
What is an appropriate software for such simple tasks?
Do you use GNU Octave at all?
If so, the latest versions of libsndfile ship with Octave modules
allowing you to do:
octave:2> data = zeros(1,1000);
octave:3> data (20) = 1 ;
octave:4> sfwrite ("a.wav", data', 44100, "wav-float");
Erik
--
----------------------------------------------------------------------
Erik de Castro Lopo
http://www.mega-nerd.com/
9:21 a.m.
2009/4/29, Andrew Gaydenko <a(a)gaydenko.com>om>:
Say, I need to generate 1 second, 2 ch, given bps and
sr wav filled with
(analog) 0.0 except for the only sample in middle with 1.0 value, or some
periodic sequence like { -1.0, -1.0, 1.0, 1.0, -1.0, -1.0, ... }, or something
else which can be described in few lines of C/Java-like language.
What is an appropriate software for such simple tasks?
Almost anything, to be honest. If you're comfortable with python then
maybe that, or octave if you know that, if you're comfortable with
Audacity maybe learn how to use the "nyquist prompt".
I use SuperCollider, here's one of your cases done in an interactive session:
~seconds = 1;
~samplerate = 44100;
c = [-1, -1, 1, 1].wrapExtend(~samplerate * ~seconds).stutter(2).as(Signal)
c.plot(numChannels: 2)
c.play(numChannels: 2, mul: 0.05) // BE CAREFUL, turn yr speakers down
f = SoundFile("test.aiff").numChannels_(2);
f.openWrite;
f.writeData(c)
f.close
Dan
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Andrew Gaydenko -
Dan S -
Erik de Castro Lopo