Thibault Le Meur wrote: > However, it does not correct the corrupted initialization state that > occur when the device is turned on before the snd-usb-audio module is > initialized with a valid device_setup parameter (see below). > There are 2 reasons for this: 1. The default setting "0" will immediately make the device stuck in a weird semi-working mode. Avoid. I'll add a check to the next patch revision that will REFUSE to load the driver for M-Audio unless a valid setup parameter is specified. Another approach would be to use a mixer control to select available configuration (with the default of NONE). 2. If you're using a daemon that loads USB drivers automatically, it will always load using "default" setting. If a valid device_setup parameter is added to /etc/modprobe.conf, it will be possible to turn on the device before initializing the driver. > As far as the documentation is concerned, shouldn't it be better to keep > an Audiophile-USB.txt file with only the following sentence: "Updated > documentation on this device can now be found in the M-Audio.txt > file" ? > Agreed. Also, I will update the JACK info. Current version can work natively with 24bit big-endian interfaces, and also works fine with Quattro in 4-channel input mode. Another problem that I found with Quattro. The driver works fine in 24/96k mode, no underruns. But in 44k/48k modes, it's always giving me JACK xruns, or just skips in arecord, even with the most forgiving JACK settings (high realtime priority and big buffers). This looks counter-intuitive, that the slower mode performs worse than faster one. Could it be that the driver reserves not enough USB bandwidth from hardware, or something similar? What settings could be changed to try to correct this? ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-devel
