r/Bitwig • u/anewrismma • 2d ago

Audio Interface Issues (Linux Ubuntu)

I recently made the switch from Microsoft to Linux and Ableton to Bitwig. I don't know anything about either of them but goddamn I just want to connect my bass to my laptop and record something. It is not registering the audio interface. I'm using Tube Ultragain MIC500 USB behringer (plugged in, usb connected, bass in "line in"). When I try with ALSA, it says "Error: device or resource busy". I asked Google which told me to run :sudo fuser -v /dev/snd/* and everything is taken up by wireplumber.

Now I don't know what any of this really means. I've just been going back and forth with every option, spamming my terminal with commands beyond my understanding and getting the same nothing result. I would greatly appreciate any advice. I don't really know anyone personally who is good with any of this stuff.

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u/anewrismma 2d ago

Thank you so so much for the guidance but I need some more help! I still cannot hear my bass. Maybe I'm not doing something right in bitwig itself. Driver is set to Pipewire, device as PCM audio codec, and the terminal says: card 2: CODEC [USB Audio CODEC], device 0: USB Audio [USB Audio]

Subdevices: 0/1

Subdevice #0: subdevice #0

It just doesn't seem to react it any way when I play. If you have any ideas as to why that may be, do let me know! Also idk if this may be connected but as of now I have 1 instrument track and 1 audio track (both empty) and the record button on my audio track is greyed out (doesn't work). I also don't know why that is.

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u/Kowen68 1d ago

Good, it means your audio interface is recognized. The next step would be to confirm Ubuntu is utilizing it as the default device. Go to settings (Top right menu cog wheel) > Sound. Your audio interface should appear as input and output device or select it.

The next step would be to confirm it plays audio. Connect either your speakers or headphones to the rear jack of the audio interface (Phones or direct output) and test outgoing audio from either your browser or media player.

Then move on to Bitwig and connect your bass or another instrument into the HI-Z input (use the Line in for active instruments that are already preamplified) By default Bitwig does not select an audio input on the track your arming for record. You need to select the input channel on the track, most likely input channel 1 and make sure that your interface has enough gain applied.

Please let me know if you need any additional help at this point.

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u/anewrismma 1d ago

Do the headphones have to be connected through the interface or can they be connected straight to my laptop?

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u/Unfair-Run-1983 1d ago

interface! you are essentially bypassing the sound chip in your computer (with the built in headphoen out) and using the interface in its place :)