Hello fellow mechanical music enthusiasts, I am new to the Internet
and only just found this organisation. I have always been interested
in mechanical music devices, particularly fairground organs.
Being an electronics engineer and some experience in electronic organ
building, I built some years ago a 48 keyless electronic fairground
organ. The tone generators are all separate oscillators for every note
and separate ranks for every voice. Each voice has it's own 35-watt
amplifier and speaker system, twelve channels in all.
To add some interest to the sound of the organ I included three tone
combinations when the organ is playing piano, i.e. sequence: forte/piano
1/forte/piano 2/forte/piano 3 etc. This gives the impression of a
larger instrument.
The keyframe reads standard keyless or keyed 48-key books using photo-
electric devices. Bass drum, cymbal, triangle, side drum, wood block
and glock are all played with electromagnets. I am at the moment
fitting a MIDI interface to it; this will allow recording from a book
or playing the organ from the computer.
I hope these brief details will be of interest to someone.
Available from me: a copy in good condition of 'The Fairground Organ'
by Eric V. Cockayne. Offers?
Paul Allen
[ Welcome to MMD, Paul. At least one of our group, Andy LaTorre,
[ has built a similar instrument with a combination of real percussion
[ devices and electronic organ sounds. It's a fine way to get the
[ music playing while awaiting real ranks of pipes! I like your
[ use of multiple amplifiers and loudspeakers; that surely reduces
[ distortion. Can you tell us more about the tone generators? Are
[ they a standard organ design? How many independent oscillators?
[ -- Robbie
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