buffer questions

buffer questions

[David Stuart]

Greetings All,

Having had some of my previous questions answered, I now understand that 
a harware buffer is made up of periods, a period is made up of frames, 
and a frame is made up of x number of samples, where x is the same as 
the number of channels.

But, I have further (newbie-ish) types of questions which should be easy 
for you guys to answer :)

o If I make a buffer in my program, does it have to match the size of 
the hardware buffer? Is it good practice to do so?
o The readi function takes an integer representing the number of frames 
to read. Is it a good idea to read an entire period at once, all 
periods, or just a few frames?
o How does one determine the size to set for the period and the hw buffer?
o One of the alsa tutorials 
(http://www.equalarea.com/paul/alsa-audio.html) does a readi using "128" 
as the number of frames, but the buffer is declared as "short buf[128]". 
Does this work because there is only 1 channel?

Dave



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