MIDI Status Insertion

Some older MIDI equipment will not operate correctly if they receive MIDI data which contains running status commands. This unit inserts MIDI Status commands before each midi data byte (or bytes) to be transmitted.

The MIDI Status Insertion unit utilizes:

• A Printed Circuit Board (PCB), 
• A pre-programmed 16F877 PIC,
• A PCB screw terminal power socket  and associated LED, and 9v battery connector
• A MIDI 5-pin DIN input socket,
• A MIDI 5-pin DIN output socket,
• The circuit schematic is available in GIF format,
• The circuit layout is also available.

The MIDI  Status Insertion unit requires:

• A 9 Volt battery or equivalent 9 Volt DC power source

Operation:

If MIDI data from any MIDI channel is detected it is checked for a MIDI Status byte. When a Status byte is detected the unit recognizes it and determines the number of data bytes required. When these byte(s) are transmitted the unit will insert the active MIDI Status byte before transmitting further data bytes, if the MIDI input is operating in running status mode.

TOM SCARFF
1 Martello Court
Portmarnock
Dublin
Ireland.

Phone: 353-1-8462160
Email: tscarff@eircom.net