At Fri, 16 Jan 2004 16:56:04 +0100, Florian Schmidt wrote: > > > Hi, > > in the alsa FAQ from the alsa wiki page [http://alsa.opensrc.org/?FAQ] > there are some open questions. Maybe someone knows the answer for them: > > FAQ015?: Midi timing is very unstable. How can i improve that?
mpu401? in or out? some boards don't have the mpu401 interrupts. on such boards, the midi timing is pretty bad, because it's driven by the timer interrupt. (it might be improved on 2.6 kernel, though.) > FAQ016?: My sound crackles when the system is under load. How can i > improve that? hmm, there is no concrete answer for this question. if the applications is a real-time app like JACK, the FIFO RT priority is mandatory. if it's a normal app, renice the app may help in general (especially in the case of O(1) kernel). of course, you can tune up the harddisk IDE DMA mode, the VM of kernel, etc. even changing the PCI slot might help. > FAQ017?: My usb-audio device has problems when using sample rates above > 22khz. Why's that? dunno :) in the case of usb-audio, the sample rates which can be divided by 1000 are preferred because of the transfer mechanism of usb. this affects especially the cases with small periodds (like JACK). > FAQ020?: "aplay -D rear <soundfile>" fails with "Invalid type for PCM > rear definition" it means that the alsa-lib doesn't support the rear output of your soundcard yet. usually it's defined in /usr/share/alsa/cards/*.conf. Takashi ------------------------------------------------------- The SF.Net email is sponsored by EclipseCon 2004 Premiere Conference on Open Tools Development and Integration See the breadth of Eclipse activity. February 3-5 in Anaheim, CA. http://www.eclipsecon.org/osdn _______________________________________________ Alsa-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-user
