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Explain battery and App Background activity ?
Every now and then my battery drains out on my app
When I go to “battery” in settings , it shows background activity for an app I have never even opened
I check in App Store if there’s been an update , but nothing
See an example BM3 . The one min you see is bcoz I opened it before sending this post
Comments
If you have background audio enabled in an app, then you don't force-quit it, it will remain running, draining your battery. You must have opened BM3 briefly the day before or you would not be seeing this. Perhaps you tapped on it accidentally and then just hit the home button. It remained running in the background that whole time.
To kill an app that has background audio enabled you need to pull up the app switcher and then swipe it off screen. Alternatively you can disable background audio, but then it will cease to work when you switch to another app such as an IAA app you're running within or alongside BM3.
Tnks
I was asking about background “activity”, there’s nothin in background . I regularly use app switcher and Audiobus “clear session” to make sure nothing unwanted run in background
I haven’t used BM3 for months
In fact when I checked “battery” , it said BM3 was still running in background , but there was nothing
Drove me crazy , just deleted
OK, that's just a mystery then. Never once have I seen an app that wasn't opened ever continuing on in the background, but I'm not gonna call you crazy because strange things do happen.
Just so you know, clearing the session in Audiobus doesn't shut down IAA apps that are running in the background. Only force-quitting them with app switcher does that. Even then IAA apps can leave ghost processes that can suck battery and cause other issues. The apps may not show up in app switcher, but they can still leave crap around unless you do a memory reset or device restart.
Once or twice I had "ghost apps" (a term that others used when I posted a similar query to yours). When I checked under Battery, sure enough, the app concerned (I forget which it was now) had been running for many hours, even though it was not listed in the Switcher. A hard reboot sorted it (I didn't know about a soft reboot back then).
Could you explain the hard and soft reboot? Thanks!
Simply restart your device after placing it on a pillow.
Hard reboot is pressing power button for a second followed by a Swipe to Power off, so the device powers down completely.
Soft reboot, on my 2017 iPad Pro anyway, Is pressing power button for a second till Swipe to Power off appears, then holding the Home button for a few seconds until login screen appears. This clears the memory and returns you to the login screen.
@hisdudeness - personally I prefer to keep Background audio switched OFF in the BM3 settings. Helps to avoid unexpected battery drain.
But I also get in the habit of saving my project and force-closing the app between sessions, as Wim suggests above
Thank you, @craftycurate! 👍
Problem is if you keep Background Audio switched off there will be a lot of issues when using IAA (for example record the BM3 output to a track AUM) or connecting to other IAA apps which are still needed at times...
Ableton Link also stops working in BM3 if background audio is disabled and the app is not at the front of the screen...
Personally I need to use the DSPMixFX (DSP insert effects etc) app to control my audio-interface and if I disable background audio BM3 goes silent...
With that being said, background audio is not only for IAA it's for 'multi tasking' while retaining audio input & output to the app...
Now I don't know what BM3 does in the background to cause battery drain, maybe it updates the store content, re-indexes databases etc.
I tend to leave background audio ON and just swipe BM3 off the screen when not used, I seldom leave apps open in the background.
Cheers!
Thanks @Samu
Yes, that's right. Turning background audio OFF doesn't play nicely with IAA or Ableton Link, if those things are important to you.
My workflow is exclusively AUv3 since 2018. And I don't do any multi-tasking whilst engrossed in making music (and neither should any of you!!)
IAA use to do that very frequently for me. That’s why I stopped using IAA. I was going to say iPadOS fixed that but I don’t use IAA so how could I know.
Same here for the most part...
...but there are cases where background audio is needed. Let's say you sequence something like the UNO Synth with BM3 and need to use the editor to access parameters on the synth that can not be accessed by it's front panel?
Without background audio BM3 stops outputting midi to the synths when the editors are used (Or if you need to tweak the settings of the controller using web-midi in chrome or something similar or load some patches to the ReFace CS using Soundmondo etc. etc.).
Most of the time background audio causes no hassle but it all depends on how well written the audio-thread of the app in question is and if it can suspend un-needed threads when not needed.(for example halt all audio processing when playback has been in idle for a minute or so).
My iPad is mostly hooked to wall power and sitting on my desk so a few extra cycles spent on background audio is not an issue as it adds more to the fluid user experience rather than having to troubleshoot why connections fail especially when music apps mostly default to not enabling background audio and I would not want to be on the support end asking customers, have you turned background audio on before connecting? (like seriously, quite common question regarding app to app connections).
Even if an app is in the background but doesn't use much power I'm ok with it...
(For example the app can be running in the background for days and only use like 1-5% of the battery).
And it's not only background audio that can drain the battery.
I removed DropBox from the side-bar in Files.app because it was draining my battery with >30% battery usage in idle mode over the night. After it was removed from the Files.app side bar battery drain stopped...
Sometimes a hard reboot is needed to really clear out all slack that may be running behind the scenes...
...when a soft reboot (ie. ram wipe) won't help.
Cheers!