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Audio Clicking / Popping

Bluetooth microphones can cause clicking/popping.
VDO.Ninja uses 48kHz audio (48000hz), so any software you are using with VDO.Ninja should ideally also use 48-KHz. If using a different sample rate, the browser or app will try to convert it as needed, but this doesn't always go smoothly. Very high sample rates are especially troublesome on some systems, so having your system be end-to-end setup in 48khz audio is suggested and reduce any additional audio processing overhead.
If using any virtual audio cables or pro audio gear, try to increase the audio buffer packet sizes, as buffer-under issues can cause audio distortion. Too small an audio buffer on some mic preamps or virtual audio cables can lead to clicking or distortion.
If using a MacOS system, ensure your computer is plugged into the power outlet and not on battery power. Systems running on batteries can sometimes have issues.
Consider reducing the resolution and bitrate of videos, as this can help free up CPU load. An overloaded system could perhaps stress the audio encoder/decoder pipeline out.
Do not use Wi-Fi if streaming high-quality music; packet loss can cause clipping. Use wired Ethernet on both ends of the connection instead.
For either the sender or viewer of a stream, make sure you are not using up more than ~80% of your total upload bandwidth. Using 100% of your bandwidth will cause packets to stall and possibly be skipped, leading to missed frames and audio clicking.
You can also try adding some URL parameters to the viewer and sender linkes to see if it helps. A few parameters to try that might help are the following: &noaudioprocessing &samplerate=48000 &micsamplerate=48000