Indeed, the app on the iOS or android device only communicates the settings to the Parrot Zik... the Zik then sets its own DSP chip to execute those settings. So you can detach it from the BT device tha has the app and attach it to a BT device without the app, and the Zik will stay with whatever EQ, soundstage, NC you had set. Then to change them you have to reattach to the device with the app and chenage them there. But once you settle on settings you like, you are likely to leave them there. In fact, when I published my comparison several pages ago, I indicated the EQ, reverb, and soundstage setttings I found best. But I'd be most interested in what you find best, so let us know what settings you like, when you get to that point. Thanks!