[LAU] Phonic Helix Board 12 FireWireMKIIcompatibility(linux/ffado)

Jörn Nettingsmeier nettings at folkwang-hochschule.de
Mon Feb 9 12:04:40 EST 2009

Simon W. Fielding wrote:
> OK - I now have a working basic FC10 system - relevant details are :-
> Hardware: Toshiba Tecra M3
> Kernel:
> Jackd: jackdmp 1.9.1
> ffado: 2.0-0.6.rc1.fc10.ccrma (libffado 1.999.40)
> Initial cursory testing shows (no recording load, just an idle mixer
> with nothing connected) :-
> jackd -R -dfirewire -r96000 -p16 -n3 ... jackd won't even start - uses
> too much CPU
> jackd -R -dfirewire -r96000 -p32 -n3 ... jackd won't even start - uses
> too much CPU

these are insanely low settings.
i have never *ever* heard of anybody running successfully at -p16 -n3,
and you are trying it at 96k. for the rest of us, that would be -p8!

imnsho, -p128 should be perfectly fine for 96k. don't waste your time
"tuning" your system for latencies below that.

there are good reasons to perform audio computations in chunks. i don't
know why people seem to get warm fuzzy feelings from invalidating their
cache lines for every new sample :)

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