search

owingsbj / ModSynth

A modular synthesizer for Android
Apache License 2.0
16 stars 4 forks source link

Android 8.1 reduction in performance #17

Closed riban-bw closed 5 years ago

riban-bw commented 5 years ago

My Moto G5 Android phone updated from Android 7.0 to Android 8.1 and I have observed substantial reduction in performance in ModSynth. An instrument that was able to achieve 6 note polyphony before suffering distortion is now struggling to achieve 3 note polyphony. Android 8.x provides low-latency audio. I wonder if this is relevant?

owingsbj commented 5 years ago

Is this still true on ModSynth 5.8?

riban-bw commented 5 years ago

5.8 is pretty much unusable on my Moto G5 recently updated to Andorid 8.1. It was capable of fairly complex instruments with 5 note polyphony when it was running Android 7.0 (and earlier version of ModSynth). The problem may be related to other issues such as changes to patches not working (see issue #19) but right now the app is unusable! Is there a way to revert to a previous (known working) version to compare performance or do you think that recent fixes are required to resolve the apparent change in resource handling in 8.1?

owingsbj commented 5 years ago

The change to Android 8.1 switches ModSynth to use AAudio (from OpenSL). I'd rather not switch it back so hopefully I can find why it is running slower. One observation you noted in email was that it was using a slower CPU. I'll add a change to set the CPU affinity to a high-numbered CPU (which I read are the faster CPUs on an octa-core). I'll also make some general performance improvements. You can expect these updates in ModSynth 5.9

owingsbj commented 5 years ago

5.9 is delivered, so closing this issue. Reopen if it's still a problem.

riban-bw commented 5 years ago

Confirmed fixed, thanks.