Re: [LAU] RTC/HPET timer permissions

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To: <linux-audio-user@...>
Date: Tuesday, November 27, 2012 - 11:39 am

On Tue, 2012-11-27 at 11:40 +0100, Jeremy Jongepier wrote:

If you use hardware MIDI the different PCM timers or
hr timer can improve jitter or sync between audio and MIDI or whatever,
at least it results in different drift for MIDI and audio, if you record
e.g. one MIDI channel after the other using hardware MIDI.

Usually system timer (default) is the best way to go,
hr timer is better, but can cause issues, PCM timer should be less good,
but there could be some voodoo when using it, that could improve things.

If you don't use hardware MIDI don't care about it and use default,
resp. system timer.

This is what I experienced. Sometimes people fall out a plane when
flying very high, without a parachute and they survive. There's no
rational explanation.

"Default" is default for good reasons, to have other options can help,
but if you don't have issues, there's no reason to care about those
optional timers.

Regards,
Ralf

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Messages in current thread:
[LAU] RTC/HPET timer permissions, Brent Busby, (Sun Nov 25, 10:00 am)
Re: [LAU] RTC/HPET timer permissions, Clemens Ladisch, (Sun Nov 25, 12:23 pm)
Re: [LAU] RTC/HPET timer permissions, Jeremy Jongepier, (Sun Nov 25, 8:17 pm)
Re: [LAU] RTC/HPET timer permissions, Clemens Ladisch, (Mon Nov 26, 2:03 pm)
Re: [LAU] RTC/HPET timer permissions, Robert Jonsson, (Tue Nov 27, 11:10 am)
Re: [LAU] RTC/HPET timer permissions, Jeremy Jongepier, (Tue Nov 27, 10:41 am)
Re: [LAU] RTC/HPET timer permissions, Clemens Ladisch, (Tue Nov 27, 12:32 pm)
Re: [LAU] RTC/HPET timer permissions, Ralf Mardorf, (Tue Nov 27, 11:39 am)
Re: [LAU] RTC/HPET timer permissions, Jeremy Jongepier, (Tue Nov 27, 11:55 am)
Re: [LAU] RTC/HPET timer permissions, Brent Busby, (Mon Nov 26, 3:24 pm)
Re: [LAU] RTC/HPET timer permissions, Clemens Ladisch, (Mon Nov 26, 3:26 pm)
Re: [LAU] RTC/HPET timer permissions, Brent Busby, (Sun Nov 25, 7:05 pm)
Re: [LAU] RTC/HPET timer permissions, Gene Heskett, (Sun Nov 25, 2:32 pm)