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Published on Jul 30, 2012
I've stripped out the internals of an old Kawai organ I've had for a few years now so I can convert it to be used with floppy disks as the audio source. This is what I have working so far. I can fit eight floppy drives across the top panel of the organ so I'll have three for the top manual, three for the bottom manual and two to be controlled either by the microprocessor or pedals.
The sound quality is dependent on how well the audio is recorded to the disk and how well the 200ms sample loops on itself. If there's a difference in amplitude where the disk loops there will be a noticeable click, which is quite noticeable on this example.
The hardware used to control the system is an ATmega324PA connected to a few latches, which are then connected to the step and direction controls of each floppy drive and the sound enable control of the audio circuit.