DIY 18-Channel Analog Stereo Vocoder and Formant System
An advanced do-it-yourself project for
the ambitious electronics and audio enthusiast
Vocoder Brochure (PDF)
Vocoder Assembly and Tuning Guide (PDF)
Vocoder Bill of Materials (BOM) (PDF)
Vocoder Bill of Materials (BOM) (spreadsheet)
At the heart of the vocoder: the channel filter board
The analysis/synthesis channel board is based on a standard 8-pole multi-feedback bandpass filter topology. For accuracy and temperature stability, resistors from the E48 series and SMD capacitors (size 1206 or 0805) with C0G/NP0 dielectric are used. A total of 18 boards cover a frequency range from 120 Hz to 7 kHz.
For a detailed view, click on the image.
A glance at the vocoder's internal structure
See the vocoder in action on Youtube
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