[SoX-users] Using sox as a library

[Keiko H. <kei...@gm...>]

Hello,

I would like to use sox as a library from a C++ program. I have read  
the man page for libsox, but I don't quite follow the details on how  
to use an effect using the library functions. A simple example of the  
kind of thing I would like to do is this:

a) Read input file A.wav
b) Read input file B.wav
c) Concatenate A and B to form C
d) Read input file D.wav
e) Mix C and D to form E
f) Trim the first five seconds off E
g) Write E to a file E.mp3

I can see that I need to call sox_format_init(), sox_open_read() to  
open a file to read, and sox_read() to read the data into a  
fox_ssample_buf. After that it gets hazy...

Let's say I want to concatenate two audio buffers. Do I just call  
sox_find_effect() to find the "sox_concatenate" effect (is that its  
name)? How do I specify two (or more) inputs to the concatenation?  
Can I just call the flow() function for the effect to get it to do  
its work, or is there a more complicated mechanism for applying an  
effect?

Does anyone know any examples of using Sox as a library in this way?  
Any help would be greatly appreciated!

Thanks,

--Keiko