Martin is an no$gba developer and he emailed it to me so I can share it with you all:
how to use a microphone???
In no$gba, have sound output enabled. Everyting else depends on your operating system, drivers, volume control, cables, plugs, etc.
Things that i don't know are: If the input level is okay, or if it's
too silent even when using maximum volume control setting. So the sound output (eg. music) is passed back to the microphone input - that might cause problems with games.
Cya, Martin
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