Is there new Amiga hardware (running OS 4.x) which supports MIDI?

[Hans_]

My understanding though is that you attach MIDI Hardware to be used in Bars&Pipes using this software

http://os4depot.net/?function=showfile&file=driver/misc/usbmidi.lha

to the USB Port (which is adding CAMD Driver for compatible MIDI Devices). This driver has been written by the same author like one of the two B&P Ports.

There are a few other CAMD drivers on os4depot. A USB MIDI device is probably the best bet for most people, as the others are for older sound cards.

Hans