A bare PCB for the MFOS Vocoder project.
A vocoder has got to be one of the coolest signal processors going. It allows you to impress vocal harmonic and dynamic characteristics onto other sound sources making them sound as if they are talking. This vocoder design works by using one lo-pass filter (100 Hz.), ten successively tuned band-pass filters (154, 208, 285, 395, 542, 720, 1013, 1495, 2000, 2546 Hz.) and one hi-pass filter (3330 Hz.) to separate the incoming control signal into its harmonic constituents. For each band the control signal appearing at the output of its corresponding filter is full wave rectified and low pass filtered to obtain the control signal's envelope voltage. This signal is used to drive a VCA through which the channel's filtered audio is amplitude controlled.
Features
- Built in White/Pink Noise Source
- Built in Square/Pulse Oscillator
- Mic/Line Inputs for Control and Audio
- Good Dynamic Response To Voice Control
- Reasonably Intelligible Speech Processing
Supplied without components or instructions. For build instructions see the MFOS website.
Soundtronics (Sonic Synths) MFOS Projects are authorized by Music From Outer Space
