Pitch to MIDI

Ever wanted to hum or whistle a tune and have a complete orchestral sound backing you? Well this project consists of the hardware and software to implement a pitch to MIDI converter  which will allow the digital playing of MIDI data on a MIDI synthesiser/module, controlled by any  acoustic instrument or voice via a microphone, or by a guitar via an electromagnetic pick-up.

The Pitch to MIDI Unit utilizes:

• A Printed Circuit Board (PCB), 
• A pre-programmed 16F877 PIC,
• A 4-way DIL switch to select MIDI channel 1-16, see Table 1
• A 9 volt battery connector
• A MIDI 5-pin DIN output socket
• A screw terminal connector for an external 9-12 volts DC supply and associated power-on LED,
• Screw terminal connectors for connecting the external pre-amplifiers 

The  Pitch to MIDI  Unit requires:

• A 9v battery or equivalent DC power source
• Associated pre-amplifier circuit

The Pitch to MIDI  Facilities are:

• A pre-amplifier to amplify, rectify and convert a low-level microphone signal,
• The unit transmits on MIDI channel 1-16
• The midi velocity byte is dependent on the loudness of the applied sound, 
• The midi note on/off byte is dependent on the pitch/frequency of the applied sound, 

The Pitch to MIDI unit involves:

• Pitch to MIDI Circuit Explanation

• Pitch to MIDI Layout Diagram

• Pitch to MIDI Schematic Diagram