• Midi encoder K2M 32 programmed for 29 t scale. Output to connect to Midi on your computer or a Midilector SR.
• The 2 electronic boards for optical reading (transistors and infrared LED’s)
• 2 ribbon cables for connecting the reading head to the encoder.
• Voltage regulator to adjust the LED’s luminosity to the card board thickness
• 2 specific printed supports.
• connecting flat cables

You have to insert the supports in your proper mecanism. The cardboard will pass between the two printed supports,  held apart by 2 or 3 mm, the holes well in front of each other, of course! With a hinge for ease of use, or not, that’s your choice.
You can integrate this system into an existing organ or even make one specifically for that.
You have the option to set a latency allowing you to transform a series of small successive holes into one.
You add:

• A Midi sound module
• a small amp on battery
• 2 speakers in a box
• a crank and a roll to drive the cardboard

And here you are with a real Barrel Organ which always plays rigth!

Please note: if you want to make a backup copy of your card board or roll, you can save the song in Midi files format, with a computer and appropriate software, or with Midilector R (recording function). Make sure you have the rights to do so. To make a file of security of a cardboard which one possesses is quite legal, but attention, to yield this file, even for free, is punished by the law, it is a counter-way. If you have a punching machine, you also do not have the right to sold the cardboard you made from this file. Please, respect the arranger work .