Model: Syntovox 221
Retail price 6000 Euro
Size: 4 HE
Features: High end model with noise & VCO, matrix panel, voiced & unvoiced inputs, attenuator per channel.
Manual, Input schematics, PSU schematics, VCO schematics, Vocoder output mixer
Only about 20 of these were made. Users include Wendy Carlos (who owns a 221 & SPX 216), Bruno Spoerri,
various electronic studio's in Europe. Best suited for studio use due to complex control.
The 221 has a 50-pin connector on the back which provides CV in and out for each channel, and other functions.
A spectrogram of the 20 filters, spaced in minor thirds.The four bands per octave create a diminished chord. Noise Sweep
The sample below is a polysynth chord on carrier, a S&H sine on the speech input.
One channel is without voiced/unvoiced detection, the other switches to internal noise on unvoiced sounds.
The left and right sounds are recorded in different passes. Play
The 1220 vocoder expander unit pictured above this 221 is a one-off piece Synton built for Dutch broadcasting company NOS.
It houses a pitch to voltage converter, CV freeze function and a 'presto-patch' edge connector for making analyzer-synthesizer patches.