Stretch light + respeaker2 + BT loudspeaker : no sound played


Everything was working well (snips, sound via respeaker2) … until I decided to connect a BT Speaker !
Bad idea.

After some times, the BT speaker is paired/trusted/connected.

But it seems that it is not found by PulseAudio :
the “pacmd list-sinks” returns only : *index 0 <auto_null>

Surely a misconfiguration I did …
Someone to help me to check where I’ve been wrong ?

BTW : the 2 mics work perfectly, as “sam watch” shows

Thanks in advance to the ones who spend sometimes on this problem