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80-4

Voltage Controlled Mixer

Courtesy/Thanks to: Digisound

Description: Voltage Controlled Mixer based on CEM 3340.
Four channel mixer with manual and external voltage control of signal mixing and panning. Frequency response from 0Hz to 18kHz. Manual control of overall gain with overload indication. Gain variable from -16 to +14dB. This unit offers many novel approaches to sound synthesis.

The original 80-4 model was replaced by the 80-4A incorporating minor improvements to the circuitry. The linear control compensation for the drive of the CEM 3330 was improved, together with a few component upgrades to reduce CV feed through and increase gain factor.

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Files
80-4.jpeg
   Picture of the frontpanel of the 80-4
80-4.jpeg
   Picture of the frontpanel of the 80-4
80-4_5_eti.pdf
   Article from ETI March 1980 for the 80-4 and 80-5
80-4.fpd
   Frontpanel Designer file for the 80-4 Original 9 x 3 inch
80-4_motm.fpd
   Frontpanel Designer file of the 80-4 MOTM-format 5U x 2U
80-4_pcb.gif
   PCB foil for the 80-4
80-4a.pdf
   Digisound document for 80-4A
Manufacturers
Digisound Ltd
   Manufacturer of the Digisound 80 Modular system. Charles Blakey ran a small family-owned company cal
Modular mother system
Digisound 80
   Modular Synthesizer