Choppy audio on iphone

[ken-hudd]

Recording on android or a computer is fine, on an iPhone/iPad, sometimes the recording is robotic and choppy. iPhone 15.0.x and iPad 14.6, 14.8 and 14.7.1. I've tried increasing the buffers to 8192 and 16384, encoderApplication: 2048, 2049 and 2051. I've tested with version 8.04 and 8.05 as well as going back to 6.0.2 with the node processor. Below is a sample recording so you can hear the choppiness. Ironically the Example/waveRecorder.html ALWAYS works, and if I get choppiness from my site, I can switch to the example page and the first recording is SOMETIMES, but rarely, choppy but successive ones are fine. Then if I switch back to my page, it records fine as well.

https://1drv.ms/u/s!Aug8aLGwjCbygZ9Jc0dcylO1fM6R0w?e=lHyAUs

[chris-rudmin]

@ken-hudd Can you share your config please?

[ken-hudd]

Currently its

mediaRecorder = new Recorder({
monitorGain: 0,
recordingGain: 1,
numberOfChannels: 1,
bufferLength: 16384,
encoderPath: "js/waveWorker.js"
});

I've tried other settings, but monitorGain, recordingGain numberOfChannels and encoderPath are always set to their current settings.

[chris-rudmin]

Config looks alright, can you create a reduced test case so that I can reproduce the issue?

[ken-hudd]

Yes, let me get that together

[vsokolovskiy]

Sorry for necroposting, but I also struggle with that issue. Any update?

My config is as follows:
recorder = new Recorder({ encoderPath, numberOfChannels: 1, bitDepth: 16, recordingGain: 1, monitorGain: 0, });