Topsy 1 is a very compact 20 to 64 note MIDI organ. This pack is designed to enable amateur organ builders to construct a similar MIDI (Musical Instrument Digital Interface) instrument.
Basic organ building techniques are NOT covered in the instructions, as this pack is intended for builders who have previously purchased other John Smith organ plans, and who wish to know what is involved with the MIDI system as far as mechanical organs are concerned.
A one-hour DVD, notes on MIDI techniques, and drawings for all the pipes - and new parts - are included.
The Glockenspiel is the same as that used for the Universal, but with 22 notes, and requires these plans.
You can hear this John's version playing on YouTubeby clicking here