I’ve recently been running a Bluetooth speaker - Duronics SPB2 - from an old Nexus 10 tablet with a custom Oreo ROM and via the Macrodroid automation app. (For what it's worth, the macro was to turn a recording of bird calls on and off each day.)
This setup caused the audio to play through both the Bluetooth speaker and the tablet's speaker. Although the Bluetooth's volume drowned out the tablet's, the need to play the file at full volume - the two volume controls were not connected as they are on my phone - must have an effect on the ageing tablet's battery life.
I'm hoping someone out there has seen this dual-play behaviour before and had a solution to it. I suspect it's a quirk of Macrodroid or its interaction with the Duronics speaker which shows no connection between the two devices' volume controls. From my bit of research, some folk would pay good money to have sound coming from both outputs!
This setup caused the audio to play through both the Bluetooth speaker and the tablet's speaker. Although the Bluetooth's volume drowned out the tablet's, the need to play the file at full volume - the two volume controls were not connected as they are on my phone - must have an effect on the ageing tablet's battery life.
I'm hoping someone out there has seen this dual-play behaviour before and had a solution to it. I suspect it's a quirk of Macrodroid or its interaction with the Duronics speaker which shows no connection between the two devices' volume controls. From my bit of research, some folk would pay good money to have sound coming from both outputs!