Modular: Modcan Vocoder 71B and a Synth Tech MOTM-101

May 30, 2011 · Posted in Uncategorized 

The Vocoder 71B is a solid DSP interpretation of the classic Vocoder effect. Analogue Vocoders that offer an adequate number of filter bands can be a challenge to manufacture with high parts count, large circuit boards and enclosures and lengthy calibration procedures. All of which adds up to high costs and large dimensions. The 71B attempts to address this, providing the most important features of a mid range Vocoder in a small package ideal for a modular environment.

To keep the footprint small we chose a simple “tone” knob which provides a “tilt” like control that scales the high and low bands with center position being flat. This method combines considerable space saving and versatility without the need for individual sliders for band levels. It also makes it possible to have with voltage control. The filter/envelope detector network uses ten 4 pole 24dB band pass filters which we found to provide good frequency isolation, important for clarity when used with vocals or speech. Also works very well processing Drum loops and other sources.

In this video:

This is just two modules, a Modcan Vocoder 71B and a Synth Tech MOTM-101 noise source. The EV dynamic mic goes through a Shure mic pre and then to the vocoder, along with some pink noise. Having the speakers up a bit was causing some feedback that helped produce some of the sustain and depth.

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