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[Csnd] ALSA, SR, ksamps, and -b Quirk?

Date2010-09-16 16:02
From"Art Hunkins"
Subject[Csnd] ALSA, SR, ksamps, and -b Quirk?
In putting together my latest OLPC/Sugar-on-a-Stick (Fedora Linux) activity, 
I've encountered an incompatibility among these variables on a particular 
system - an Intel Classmate PC netbook (2GoPC).

The variables are these:
Fedora 14 Linux/Sugar-on-a-Stick
SR = 44100
ksmps = 100
-B = 2048
-b = 128
-+rtaudio = ALSA

These variables work just fine on most computers (via SoaS). They also work 
fine on my XO-1 and XO-1.5 systems. (They are also values I've worked with 
"forever.")

However, on my Intel Classmate, ALSA gives an error saying -b = 128 is an 
incompatible buffer size, and to try -b = 204.

(I have gotten this response before, and have needed to try several 
different [sequentially recommended] buffer sizes before finding one that 
the Classmate accepts.)

In addition, the above set of variables works fine when SR = 48000 or SR = 
32000.

Can someone please explain?

Art Hunkins 



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