"Topsy" is the name of a portable organ designed by John Smith. John has developed several organs, originally controlled by traditional paper rolls and later by MIDI files.
I have always been interested in mechanical musical instruments and, when I discovered John's web site, I decided to try building one myself. I chose his "Topsy 3" design because it uses MIDI rather than paper rolls. Paper rolls are difficult to produce whereas MIDI files can be created and edited fairly easily. This should allow me to make my own musical arrangements.
This blog is intended to be a diary of my organ-building project.
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