5 May
2007
5 May
'07
7:55 a.m.
Hi Florian....
seq24 does _not_ use RTC for timing. It uses an
approach based on sleep() (in
some way or the other), so setting the rtc-max-frequency does nothing for
seq24 performance.
Seems correct. I tried to grab latest seq24 and compiled it. While
testing to find out how it works, I grep-ed the source code and none
indicate it has something to do with RTC programming. However, I will
keep looking and studying the code.
FYI, I tested seq24 using this simple setup:
seq24--> ALSA port --> timidity (as ALSA sequencer client)
To improve seq24 performance over the vanilla kernel
you
need a kernel with the system timer frequency set back to something like
1000Hz (vanilla has 200Hz, which is too unprecise for MIDI timing based on
sleeping short amounts of time)..
That's what I got too. A loop (?) take data array and using *sleep(), it
waits until the right time to deliver the midi messages to related
driver (in this case ALSA).
I found an interesting parameter, that is --stats. Seems like it counts
how long it takes to work on a single MIDI message. Anybody knows more
about this parameter?
NB: Once again, thank you Florian..
regards,
Mulyadi