Just download QMix onto my Samsung S5. No problem pairing to the SL32. Permissions worked as expected. Two problems though...
1) no reverb in headphones. I can see the level moving, but cannot hear any reverb. FX B is assigned, selected. Played with the Me channel, all to no avail.
2) overall volume quite low. Changing the cellphone volume has no impact, no higher or lower. It's like the app isn't talking to the phone.