[ssgh]

It uses "audio/webm;codecs=opus" to record mic. Now it's possible to change it in the config menu in the top right. Safari probably needs audio/mp3. Edit: also consider "audio/foo;codecs=pcm" where "foo" is something compatible with Safari.

[geraldhh]

ugh could you maybe add some code to detect apple-platforms and set this accordingly (like batteries included)?

edit: tyvm, nice idea! would very much like to try it