I would like to know how to force a Mac to recheck the USB connections without needing to physically unplug and plug them again. Is there a Terminal command for this?
Context: I have a USB audio connection (an amplifier with a DAC) directly connected to my Mac (description below). With everything on, once I plug the USB to the Mac the audio output is correctly detected and it appears in the menu bar under the sound icon. Also, as expected, when I power off the amplifier the USB audio output is no longer available (it disappears from the sound menu).
The problem appears when I power on the amplifier again, since my Mac does not recognize the USB sound output. To make it work, I need to physically unplug and plug again the USB with the amplifier turned on.
Thus, if there was some system command (either through Terminal or by other means) to force the Mac to recheck the USB connections that would be time saving for me.
Configuration: The issue occurs on two Macs, both of them with Big Sur 11.4. One is a Mac Pro 2013 and the other a Macbook Pro 2018 13". I also had the same problem with Catalina. The DAC/Amplifier is an Emotiva TA 100. For either mac, I use a single cable directly connected between the computer and the amplifier.
Update (16/October/2021): I "solved" my problem by buying another DAC. I understand that my previous one had some problem, but it would be nice to have a software way to circumvent the issue.