v0.4.0

Added

• Solo, fader and filters over the local API. GET /v1/state now reports each
  channel's soloed, faderDB, highPass, gate, compressor, exciter,
  bassEnhancer and pad. New calls: POST /v1/channel/{i}/solo (and
  /solo/toggle), POST /v1/channel/{i}/fader, and
  POST /v1/channel/{i}/effect/{highpass|gate|compressor|exciter|bass|pad}/toggle.
  Until now the API could mute and set the input gain, but not move the fader you
  actually see in the mixer.
• OpenDeck and Stream Deck plugin: Solo, Level (fader) and Filter keys, and a
  label on every key. Keys tell you when the app they talk to is too old.