Rick,
You can try two packages found here:
http://folk.uio.no/fl/aaudio.shtml
One is using the ALSA API and one is using JACK. Both can do full
duplex. At least on the RME cards that I used when writing the
code.
HTH,
/Fredrik
On 10/28/11 17:02, Rick T wrote:
Wow thanks I do have a full duplex sound card and I'm
using ubuntu 10.04 64bit. This looks like what I'm looking for
hopefully it will allow me to create my own test signals to use.
Thanks again
On Fri, Oct 28, 2011 at 3:21 AM, William Krekeler <address@hidden>
wrote:
Greetings All
I know octave can play arrays
as sound but, I was
wondering if Octave can do this. I would like
to cycle through a range of
frequencies and have octave play them using the
speaker out on my computer, and
have octave also record the sound using the mic
input to get the max
value. I'm trying to automate a way to have
octave cycle
through frequencies and record the
data received so I can
go back latter and look at the resonant
frequencies. Can Octave do this
type of operation in parallel?
clear
all
t=linspace(0,1,44100);
A = 1;
%
amplitude
Fs =
44100
for
ii=1:1:10
freq=ii; %how many in 1 sec
T = 1/freq; % period of the signal
vertoffset=0.5;
% square
square = mod(t * A / T, A) > A / 2;
square = square - vertoffset;
sound(square,Fs);
end;
Playing
sound and recording
sound at the same time requires a full-duplex
soundcard. This is not the
default configuration so from a hardware
standpoint your computer may not be
able to do this. Next you need a low-latency
driver like ASIO, there are others
I just can't remember then right now. For code
look at MATAA (Mat's Audio
Analyzer) for examples of how to input and output
sound at the same time along
with analysis.
http://sourceforge.net/projects/mataa/
http://www.audioroot.net/index.html?analysis/mataa.html
Hope
that helps.
William
Krekeler
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