When saving a Type 0 SMF my Technics KN6500 adds an event to each track that I can see using a third party MIDI editor.
The controller is named “Midi Vol Node” and uses CC#87 set at the same value of the channel's CC#7 (Main Volume). I have not heard of Midi Vol Node before, it doesn’t seem to do anything.
I am presuming this is a Technics thing that would not usually be seen?
Would be interested if anyone can throw some light on this.