Thanks, the Presonus and Alesis interfaces are class compliant devices according to their user manuals. So I ordered the Alesis IO|2; the Presonus appears to lack line-level inputs.
The interface will be connected to an older notebook with USB1.1 hubs, which should be fine. Will try it with some USB2.0 hubs as well. Best, -- Erwin On Thu, 31 Jul 2014 12:55:47 +0200 Alexandre Ratchov <[email protected]> wrote: > On Thu, Jul 31, 2014 at 12:48:35AM +0200, Erwin Geerdink wrote: > > Hi, > > > > I'm considering the following usb interfaces for my audio setup: > > > > E-MU 0204 usb > > E-MU Tracker Pre > > Presonus Audiobox usb > > Alesis IO|2 Express > > > > Recording will be done on a Windows machine, however it would be > > nice if I can use it for audio playback from an OpenBSD machine as > > well. I found the envy(4) and emu(4) man pages but I'm still not > > sure whether playback would work with any of these devices. > > > > Anyone experiences or suggestions? > > > > Hi, > > These devices are handled by the uaudio driver, assuming they are > USB class compliant (driverless ones are likely to be). > > Unfortunately, on OpenBSD, USB1.1 devices using isochronous > transfers don't work behind USB 2.0 hubs yet. In other words USB1.1 > audio cards are unlikely work on modern machines. I'd suggest you > to test the cards if possible (just plug it try to play a simple > .wav file). > > Another option, would be to get a old USB1.1 adapter and attach the > USB1.1 card on it.
