install
brew install blackhole-16ch- midi音频设置，添加多输出设备
- 勾选 blackhole 16ch
- 打开 quicktime，新建录制音频
- 录制⏺️按钮边上，选择 blackhole 16ch：blackhole 16ch
- 然后开始录制
问题
What is difference between 2ch and 16ch?
as far as i know there is not really a difference except the 16 channels supports 16 channels, so you can use 16ch hardware audio interfaces and route every input trough blackhole separate.