Thanks, this did not help, but I discovered a very strange thing: when selecting the "Speaker B" button, the volume controls get reversed!

When "Speaker B" is selected, turning the volume knob to the right turns down the faders, turning it left turns them up.
When "Speaker B" is not selected, the knob works as it should.

The other buttons still do not work, however, with the exception of the "Recall" button.

Hi there,

-The totalmix FX version is "Version 1.82 macOS (1)".

-I'm on MacOs 13.3.1 (a) (22E772610a)

-USB Current Revision: 49
-DSP Current Revision: 2.60
-Firewire Current Revision: 27
-Class- Compliant Current Revision: 14

The UCX is connected via USB.

Hope this provides the information you need!

Hi Matthias, I replaced my Totalmix FX with the version you provided, and everything seems to work again, so thank you very much. I'm still not sure what caused these problems but I'm glad to be rid of them

Hi, I don't mean to hijack this topic, but I'm having the exact same issue with my Arc USB, only then in a Windows 11 environment.

For context, I was cleaning my desk and after I was done, I suddenly only had sound through my Headphones and the volume  control, and I really had to mess around with the Totalmix FX setting and even my windows sound mixer and sound settings to get audio from both monitors as well as headphones again. I must have accidentally pressed some combination of buttons for this to happen. The Snap1 button is turned on, and when I press it, it cuts all the sound, sets the fader of AN 1/2 to -infinity and kills my PH 7/8 output which my Headphones are connected to.