What the hell does this even mean? I've tried setting the output to 16, 24, and 32 bit and this exact error keeps popping up.
Unrecoverable playback error: Unsupported stream format: 44100 Hz / 24-bit / 2 channels (0x3)
This came about by wanting to play music in foobar through my Bluetooth headphones while my main speakers are connected to the primary sound device. This is on Windows 10 fwiw.
It usually means the output device you selected does not support that stream configuration - maybe the device expects 48000 Hz sample rate (?)
Did you select an output with '[exclusive]', or ASIO? What happens if you leave foobar on 'Primary Sound Driver' and change the device in Windows? (speaker icon on taskbar)