A-129-5

Vocoder Voiced / Unvoiced Detector

Note: Per Doepfer's A-129 Vocoder-Subsystem page, the A-129 series is no longer available.

The Voiced / unvoiced detector (A-129/5) can recognise voiced and unvoiced sections in the speech signal, and switch the carrier signal accordingly. The incoming speech signal is processed through a pre-amplifier with adjustable gain and a treble boost unit. The treble boost improves the vocoder effect. The voiced/unvoiced recognition system controls a voltage controlled switch (like A-150) which is used to switch between the voiced and unvoiced carrier signal (e.g. VCO and Noise). Additionally the voiced/unvoiced information is available a a gate signal. A LED displays the unvoiced state.

For more detailed information please look at the English user's manual: http://www.doepfer.de/a100_man/A1295man.pdf

http://www.doepfer.de/a129e.htm