Mac Audio MIDI

Utilities

BlackHole is a modern MacOS virtual audio driver that allows applications to pass audio to other applications with zero additional latency.

• https://github.com/ExistentialAudio/BlackHole
• https://github.com/ExistentialAudio/BlackHole/wiki/Multi-Output-Device

Mac : combine multiple audio interfaces

• Combine multiple audio interfaces by creating an Aggregate Device : https://support.apple.com/en-us/HT202000
• https://help.ableton.com/hc/en-us/articles/209071609-Using-Aggregate-Devices-and-multiple-audio-interfaces

How to send MIDI from Ableton to WebMIDI (Mac):

1. Run the built-in OSX app called 'Audio MIDI Setup'. Select 'MIDI Studio'. Double Click 'IAC Driver'. Then check the 'Device is Online' checkbox.

https://stackoverflow.com/questions/43544357/how-to-connect-web-midi-api-to-native-application-like-ableton-live

2. Go to Ableton -> Preferences -> MIDI. At the bottom for 'Input: IAC Driver (Bus 1)' enable 'Track' and 'Remote'. For 'Output: IAC Driver (Bus 1)' enable 'Track'.

3. Now in the the Ableton midi track you want to send notes from, Select 'IAC Driver' as the midi output.

Mac IAC driver

• https://support.apple.com/guide/audio-midi-setup/transfer-midi-information-between-apps-ams1013/mac

Ableton virtual MIDI bus

• How to setup a virtual MIDI bus : https://help.ableton.com/hc/en-us/articles/209774225-How-to-setup-a-virtual-MIDI-bus