8bit Famicom harmonica anyone looked into it?

[dark_cerberus]

Hey,

I'm sure all of you seen that video hundreds of time. Bunch of guy who used the sound cheap of a Famicom mario bros game to create an 8 bit harmonica.

https://www.youtube.com/watch?v=pLpDXkMQmcc

But did anyone knows how to make it? Because I'm not even sure they used a Mario original board.
Looks like the same mic has in the famicom controller player 2.

So i'm curious if anyone dug into it 
Post Merge: April 23, 2019, 03:38:10 am
An extra bit of information from here: https://hackaday.com/2014/01/28/the-8-bit-harmonica-blows-in-from-japan/#more-113597

A row of 8 microphones picks up the players breath sound. Each microphone is used to trigger a specific note. The katakana in the video shows the traditional Solfège musical scale: do, re, mi, fa, so, la ti, do. A microcontroller monitors the signal from each microphone and determines which one is being triggered. The actual sound is created by a Yamaha YMZ294. The '294 is an 18 pin variant of the venerable General Instrument AY-3-8910, a chip long associated with video game music and sound effects.

[dark_cerberus]

So I keep on digging about the different parts:

Cristal oscillator: C012100 raltron 4mhz 02ER16 ( or 02ER10 )
Music processor Yamaha: YMZ294 -D  9532 HAGA
Audio AMP:
Microphone: (looks like the one from the original famicom controller, anyone know the specs?)
2x 20mm (CR2032) Battery Holder
0.5W Loudspeaker 8R 20MM

[P]

Music processor Yamaha: YMZ294 -D  9532 HAGA

Figures they didn't use a Famicom CPU/APU.

Microphone: (looks like the one from the original famicom controller, anyone know the specs?)

You can use about any electret microphone that fits I guess.