[alsa-devel] [PATCH] ALSA ymfpci - Add "Playback" to FM Legacy Volume control
Add "Playback" to "FM Legacy Volume" control since
- YDSXGR_LEGACYOUTVOL is a Playback Volume control for OPL3 FM Synth
2011/9/11 Clemens Ladisch clemens@ladisch.de:
Raymond Yau wrote:
Add "Playback" to "FM Legacy Volume" control since
- YDSXGR_LEGACYOUTVOL is a Playback Volume control for OPL3 FM Synth
Applied; thanks!
Clemens
How accurate is the ymfpci timer ?
my ymf724f seem play quite well with alsa "hw" device but with bad noise with alsa-pulse plugin (e.g. aplay when not using default period times ) and it also occurrs on benshee on ubuntu 11.4 live cd
Does the driver really need periods_min =3 ?
it there any test case which it does not work with 2 periods
changing default sample rate of PA server from 44100 to 48000 in daemon.conf does not help to remove the noise
Raymond Yau wrote:
How accurate is the ymfpci timer ?
The period interrupts are not accurate at all. The ymfpci hardware internally uses fixed periods of 256 frames at 48 kHz; the driver reports a period interrupt when the next hardware interrupt at or after a period boundary occurs. The current position reported by the hardware is the position at the time of the last hardware interrupt.
my ymf724f seem play quite well with alsa "hw" device but with bad noise with alsa-pulse plugin (e.g. aplay when not using default period times ) and it also occurrs on benshee on ubuntu 11.4 live cd
It should be possible to increase accuracy by using the hardware period parameters (48 kHz _and_ 256 frames/period).
TODO: implement support for the NORESAMPLE flag.
Regards, Clemens
participants (2)
-
Clemens Ladisch -
Raymond Yau