but the underlying program for the music frequency curve comes from the app’s LE BT
No I don’t think so, you have a dedicated bluetooth music program programmed in your ( classic 4.2 not LE) and not the App, so if you remove the App from your phone and play music directly from your phone, what happens? Or music from other Bluetooth devices, say your laptop (turn phone off) and try, I’m curious as to what happens when you do this.
You’re ignoring this member’s posts.