Sync Problems on iOS (and beyond)
A while back, we identified two problems while testing and measuring. This is brief overview mby Johan, our Product Owner, on how the sync problems were observed, examined and solved. The first was a major latency (50-250ms) primarily on iOS that felt performance related. The second one was a drift in the recordings made on iPhone 7 (and once on Windows), that felt like it had to do with those recording in 48000 instead of 44100 sample rate. The way this was tested was by recording using our app, and letting the song click track be picked up by the microphone. We played all the tests with a 120bpm drum track (cowbell on all beats). Because we compensate for the device recording latency by removing the latency tester value from…