Hi,
I have some speakers w subwoofer connected to my TV but would like to mix the sound of other devices to that speakers especially the music from my smartphone and so one.
May be I can connect some usb sound card to the pi to route the tv sound trough and some blue tooth dongle to receive sound from the smartphones and mix it in by some software.
Are projects / software known in that area, what is a good usb soundcard for mixing?