ALSA library name / other easy way to capture sound

ALSA library name / other easy way to capture sound

[David Lee Lambert]

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I'm trying to write a program that captures a short audio segment (~10 s),  
stores it in a deque<float>, and does some linear-algebra on it.  However,  
I've been having a lot of trouble reading audio input.  At first I tried 
opening "rec" as a subprocess,  but it seems to only respond to SIGINT when 
standard output is connected to a terminal.

I've also looked into using ALSA.  I found the headers on my system,  and my 
code seems to compile all right using them (I found the tutorial at 
http://equalarea.com/paul/alsa-audio.html#basics helpful).  However,  when I 
try to link,  I get errors like the following:

 g++ -O1 -Wall -g -o test3 test3.cpp audioreader.o -shared -lalsa
/usr/bin/ld: cannot find -lalsa
collect2: ld returned 1 exit status
make: *** [test3] Error 1

Are the ALSA functions normally available in some shared library?  What is it 
called?  Is it a good idea to use it in such a simple application,  or would 
I get acceptable performance by opening 'arecord' in a subprocess (and can I 
kill it after a specified time)?

-- 
David Lee Lambert ..... Student, Dept. Computer Science,
  Wayne State University (lab: 410 State Hall)
<as4109@wayne.edu> or <lamber45@msu.edu> or +1 586-873-8813
Homepage at http://paris.cs.wayne.edu/~as4109/

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Re: ALSA library name / other easy way to capture sound

[Lee Revell]

On Tue, 2006-04-18 at 19:56 -0400, David Lee Lambert wrote:
> Are the ALSA functions normally available in some shared library?
> What is it 
> called?   

-lasound



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