Gustin Johnson wrote: > On 10-06-21 08:42 AM, Daniel James wrote: > >> Hi Ralf, >> >> >>>> FAIL >>>> >>> best latency was 1.29 ms >>> worst latency was 7.00 ms, which is too much. >>> >> Thanks for running those tests, that's very helpful. >> >> I'd be interested to know if other users can 'pass' this test using our >> current distros and kernels. If not, it seems like we have some more >> tweaking to do :-) >> >> > Those values are what you can expect with USB MIDI. If you have no > choice but to use USB gear then try to minimize the number of USB > devices that are in use. For example use PS/2 based HIDs (aka keyboard > and mouse). Disconnect any other USB devices (such as printers and > scanners). > > Even doing that I do not think that there is much room for improvement. > > In the next couple of days I will try and test my own rig with the RME > and USB MIDI interfaces.
It's the only USB device in use. Mouse and keyboard are PS/2 devices, my printer isn't in use, but still a parallel port one and the USB stick is just for temporarily backups and usually not connected. I did start a reply regarding to rtirq defaults for USB and I started an experiment, but then my PATA hard disk failed and there is an issue with GRUB for my SATA. I wasted my whole day with trying to repair GRUB for the SATA, but it didn't work. Then I tried to run a live cd, to get access to the internet, but there is no new live cd with PPPoE and a lot of old live cds didn't run on my computer or didn't support PPPoE too. Now I run the Ubuntu 7.10 live cd from a German magazine from 2008, it ships with pppoeconf. Fazit: At the moment I don't have access to the ALSA MIDI latency packages and I can't run 64 Studio 3.0 beta and 3.3 alpha, both are on the broken PATA. Tomorrow, perhaps tonight, I'll try to get access to my SATA, resp. to Suse 11.2. I don't have the time to do it now. Hopefully my PATA will start just one time again, to get it completely up-to-date backuped, at the moment it's disconnected to nurse it. Anyway, if I shouldn't reply to ALSA MIDI toipics, then it's not because I'm using my Atari ST, but because my PC is broken ;). :) Ralf
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