Re: [linux-audio-dev] about MIDI timing...

Chris Cannam wrote:
> Clemens:
> > Most sound cards don't have an internal timer that could be used for
> > MIDI timing. ALSA uses whatever timer is configured, the default for
> > this is the RTC timer.
>
> It is? For ALSA sequencer queues? I thought the
> default was system timer.

Since 1.0.11, the RTC timer is used, if available.

> Maybe it just depends on the modules you have loaded.

Timer modules are loaded automatically.

> My impression from Rosegarden users' reports has
> been that trying to use the ALSA sequencer with the
> RTC timer (something I've never bothered with myself:
> I always use a 1000Hz system timer) is a reliable way
> to lock up your system completely, with most kernels
> from about 2.6.13 or so onwards.

Kernels >= 2.6.15 work. The configure script checks for older kernels.

HTH
Clemens
Received on Wed Oct 25 20:15:09 2006