Web MIDI

Status

• Enabled by default at m43
  • The base spec is Working Draft 17 March 2015, but MIDIOut::clear() is missed.
• MIDIMessageEvent::receivedTime deprecation
  • deprecated at m54, and will be removed at m56.

W3C spec

• Latest editor's draft: http://webaudio.github.io/web-midi-api
• Issue tracker: https://github.com/WebAudio/web-midi-api/issues

Implementation notes

• OS native software synths are partially disabled on Windows for security reasons
• sysex permission can be allowed only for secure source like https:// or http://localhost
  • See Prefer Secure Origins For Powerful New Features
• sysex is not available from Chrome Apps (crbug.com/266338)

Web MIDI content layer - Design overview

Chromium open issues

• Cr=Blink-WebMIDI @ crbug.com

Trouble shooting

• Crashes for OOM on Windows: VirtualMIDISynth may be the root. See https://crbug.com/493663.