ios - Which way is more simple to capture Audio by mic, meanwhile play the audio? like audio amplifier -

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i have researched audio apis ios. there several layer apis perform audio capture , play.

my app needs simple function audio amplifier (needs delay around 0.2 seconds). don't need save record file. not sure way more simple implement it. core audio? or avfoundation?

how record audio on iphone avaudiorecorder? not sure link working case or not.

while playing sound not stop recording avcapture link playing other audio when recording. not suit case.

for buffered near-simultaneous audio record , playback, need use either audio queue api or audio units such remoteio. audio units allow lower latency.


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