I have few options
1 - Building Backup tracks (stereo) and run them through the PI3 (this should work as it is quite easy to build an audio server (e.g. volumio no need of windows OS) therefore I will be able to make a play list and run the backing tracks in the right order.

2 - Runing BIAB with Realtracks would be my prefered option but as you say not sure the ressouces available in the PI3 would be enough (I don't need MIDI IN and OUT) I would probably need ASIO4ALL as th audio Driver

I will try different versions of BIAB (as I keep them safe for many years so

Would RealBand take less ressouces as it could also be an option


Dedicated DAW - i9 9880H - 32Go Ram - BIAB 2023 UltraPak

Mac Mini M2 Pro 32 Go RAM & Mac Mini M2 Pro - Cubase Pro 12 - Dorico 5 - Camelot Pro 2 - RME Fireface UFX - NuRAD (Berglund Instruments)
@+ SaxFred