On Fri, 16 Jan 2004 20:09:21 +0100 Takashi Iwai <[EMAIL PROTECTED]> wrote:
> > 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.) I also heard about something that midi timing can be improved with an real time clock module [rtc], but i don't know about any details. I will again search the ML. Maybe you or someone else can provide some quick pointers 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. Ah, some good advices. > > > 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). This question came from a user in #alsa. It was about normal applications like aplay and xmms. I suppose the source of the problem was the usb setup, but since i don't know nothing about usb [i don't use it], i was not much of help in this case.. > > > > 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. Ok, thanks for the answers :) appreciated. Like Marc Constable i still want to once again mention the importance of the wiki and would like to see more integration with the official docs. I could imagine stuff like providing a wiki link for every official page of documentation, so users have a quick way of discussing things without the hassle of signing up to ML's, etc. Or suggestions of additions to flow bck into the official docs.. Patrick, what do you think about this? Regards, Florian Schmidt -- http://www.soundclick.com/bands/9/florianschmidt.htm http://www.arted.biz/mista.tapas ------------------------------------------------------- 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
