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roblogic/recording audio with blackhole on mac.md

Created September 21, 2024 06:47
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recording audio with blackhole on mac.md

install blackhole

using Homebrew

brew install --cask blackhole-2ch

mess around with MacOS audio device settings

applies to intel macs as well

https://www.avtouchbar.com/blackhole-m1-macs/

play the music, using ffmpeg to record it

i created this shell script: recordff.sh using info from the forums

#!/bin/zsh

./basic ffarpeggio.bas &

export FFMPEG_FMT_SYSTEM_AUDIO=avfoundation
export FFMPEG_INPUT_DEVICE_SYSTEM_AUDIO=":0"

echo "Recording system audio."

ffmpeg\
  -nostdin\
  -f ${FFMPEG_FMT_SYSTEM_AUDIO}\
  -i ${FFMPEG_INPUT_DEVICE_SYSTEM_AUDIO}\
  system_audio.wav

Note, the program ffarpeggio.bas is here, and the basic executable is RHN's Chipmunk Basic

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