[zamadatix]

Assuming the chipset support jack restasking (most don't).

[milkey_mouse]

It's unlikely that a basic Bluetooth speaker would even have an ADC to switch to, not to mention speakers without Chromecast-like streaming capabilities probably only have some tiny real-time operating system.

[jacquesm]

You only need one bit of digital input and oversampling to make for a pretty good ADC.