>Given that the alsa driv interrupts at period
>boundaries(which are defined in bytes), the tests i
>have carried out prove otherwise..i.e that the driver
>operates in millisecond power-of-two based periods.

on most PCI-based hardware, the audio interface interrupts every N
audio frames, where N is generally a power of two.

on USB-based hardware, the audio interface interrupts every N
milliseconds. 

asking ALSA for a period size of B bytes and expecting to get that
from the hardware is, uhm, unrealistic. to be honest, i wasn't even
aware that ALSA provided an API for this. 

--p


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