问题
Basically I'm using the plugin sound_stream which it's very nice to record/play or stream the mic audio.
I'm trying to do this stream listen to frequency between 2.35Hz and 2.5Hz.
How it would be possible to archive this?
I learned mainly Java but I'm trying to do both platforms that's why I'm using Flutter. So help/tips are very appreciated. Thank you!
来源：https://stackoverflow.com/questions/62538540/flutter-change-audio-frequency