I have ThumbJam on both an iPhone and iPad. Both have (the older) external speaker jacks and Bluetooth. I have a guitar Rig 2 connected to the iPad and using the iPad’s Bluetooth to connect to the DM48X. The Rig 2 is then plugged into a channel of the Harbinger MLS 1000 PA. My iPhone is connected to my Harbinger MLS 1000 via a Bluetooth channel. This way I can hopefully play to backing tracks or over music on my phone. When I play out with a guitar player, I don’t need the phone. That’s the plan. My DM48X is a few days old. String Ensemble, Flute, Trumpet seem to sound good, not much else. Sax is too breathy. Not impressed with GarageBand sounds. I am transitioning to the changes in breathing since it is more airtight and less volume is required. I have not messed too much with other properties outside of the presets. The octave-1 helps to obtain a lower note than C. I hope to do some Christmas tunes soon.