This App makes only sense, when you connect an external MIDI device to the iPhone (e.g. iRig MIDI). “MIDI tools” is made for monitoring incoming MIDI messages (including “system exclusive” and “real time”).
MIDIWriter is a simple iOS Universal app that transmits MIDI note messages by hitting keys on a keyboard. You can use either the on-screen software keyboard or a Bluetooth/Dock-connected hardware keyboard for iOS.
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