You can also select in the preferences inside of Reaper, 'Close Audio Device' when Reaper is not the active application, thus when you select another app to play from, then Reaper will close the ports of the ASIO driver for the sound card as long as Reaper is not the active application. Chose which works best for you in the Reaper Sound Card settings. ASIO is more of a professionally used driver, but it is limited to 1 app at a time accessing the sound card. Microsoft Sound Mapper is commonly selected by default in other apps because it is most compatible when audio is played from multiple apps, but also provides the worst audio latency problems with the specific app that is using it. Something like WDM, WAVE and Microsoft Sound Mapper drivers don't have this same problem of sharing audio between apps and is likely what the other apps have selected by default. If you want a quick fix, then go into the audio device options inside of Reaper and select a different sound card driver for the UMC-404HD. Which driver are these 'other apps' which don't have this problem using? Well I hope I have provided engough information.This is a very common problem with using ASIO drivers, which Reaper will select by default since it provides the best latency performance. Please let me know if need to provide more info ok?ī.png (229.11 KiB) Viewed 9022 times AlsaMixer.png (98.88 KiB) Viewed 9022 times I don't know if it is an ALSA, OR the Interface problem (Behringer says that it is USB compliant and runs OTB with Mac OS) but did not work for me at all Well I hope I have provided engough information. I've installed 17.10 then formated the HD and installed 16.04 and in both systems I could not make MB nor Ardour to run. but even when I make it work, I can't record, play anything. While Installing MixBus I've got couple messages regarding processor scaling systems governor to be set as ' performance' which I did (I'll try to load pics here).īut despite all the adjustments done, seems that the system and the interface are not getting along too well. I've tried the Unity under Windows and it runs fine. running MixBus under Alsa>Jack etc.) But it doesn't work at all. I can start Jack and make all adjustments, but when I load either Ardour or MixBus, starts but sytem becomes quite unstable, no sound etc. I can see the device under Alsa Mixer etc. Differently from what I've seen around, Jack recognizes the interface, Alsa Mixer too (altough it is not on the top of the list). I've recently bought a Behringer's UMC404HD.

My question here is related with running Ardour and Mixbus.

Behringer umc404hd asio driver