I’m using guitar therapeutically too. I lost many chords but they come back. Plus, I played a classical not Electric so the neck width is smaller. It’s cool when you get one back. And it’s a guitar, there’s always more than one way to play a chord. I’ll need to check out that app. I’ll try it on Europa. The GT40 has a nice bass sound to it from the port. Just be sure you have the amp angled toward your ears. I think some people miss that. Smaller amps need to be placed correctly. Nice music streamer too. None of the Bluetooth amps seem to be great when it comes to streaming video. Bluetooth has a lag. I don’t think amps were designed to synchronize with video. If you need a really good desktop sized amp for an office vs man cave, look at the Vox Adio GT Air. When I work from home I use it. Fits on a shelf but can keep up with the bigger modelers easily. Streaming sounds so good. I’m not at the Gilmore level but I’ll learn some surf tunes. Love that sound. Keep on playing... and have fun.