NEW — VoIS Modular: 15-Channel Vocoder and Fixed Filter Bank

A modular vocoder in Eurorack format.


VoIS modular front side

Features:

  • 15 adjustable filter channels (eight poles) with clipping indicators
  • Slew to create unique slurring effects
  • Silence bridging to fill periods of silence with the filtered excitation sign
  • Spectral shift (WRP1) to shift analysis filter channels up or down
  • Spectral tilt (WRP2) to manipulate the overall spectrum with a single knob
  • V/UV detection for automatic detection of voiced/unvoiced signals
  • Freeze to bring the vocoded signal to a standstill
  • Noise to select either pink or white noise for the excitation of unvoiced signals
  • BP/LP to select between low-pass or band-pass response of the lowest channel (100 Hz)
  • Line inputs for voice and exitation signals with clipping indicators
  • FFB Out to output the fixed-filter bank audio signal
  • Vcdr Out to output the vocoder audio signal

The fixed-filter bank is adjustable via the 15 channel filters, spectral shift and spectral tilt.

Promotion: 50€ off (Offer valid until Dec 31, 2021. Promotion already included in prices shown below.):

  • Europe (tax included): 420€ + shipping
  • U.S.A. (tax free): $420 + shipping

Pricing subject to change.

User's Manual (PDF)

Note: On the final frontpanel in the shipped product, the print "WRP1" will be replaced with "Spectral shift" and "WRP2" will be replaced with "Spectral Tilt".


See the VoIS Modular in action on Youtube


Ultimate VoIS: Professional 18-Channel Analog Stereo Vocoder

A vocoder with unmatched intelligibility in a 2U rack mountable cabinet.
Now available as a prototype for evaluation purposes.


Ultimate VoIS vocoder front side

Features:

  • 18 adjustable channels with each frequency assigned either to the left or the right vocoder audio output
  • Line inputs with volume controls and peak program meters
  • Silence bridging to fill periods of silence with the filtered excitation sign
  • Slew to create unique slurring effects
  • Freeze to bring the vocoded signal to a standstill
  • V/UV detection for automatic detection of voiced/unvoiced signals
  • XLR connectors on the rear side for the use in a professional setting
  • No compression/decompression used to achieve best signal fidelity
Ultimate VoIS vocoder back side


DIY 18-Channel Analog Stereo Vocoder and Formant System

An advanced do-it-yourself project for
the ambitious electronics and audio enthusiast


general picture of the vocoder

Vocoder Brochure (PDF)

If you would like to build this vocoder, follow the thread on modwiggler.com



At the heart of the vocoder: the channel filter board

analysis/synthesis channel 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.


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Detailed view:

analysis/synthesis channel board


A glance at the vocoder's internal structure

view into the vocoder

See the vocoder in action on Youtube