The Vocoder was invented by Homer Dudley in the mid-30's of the last
century. Dudley worked at Bell Laboratories, and this is where the first
Vocoder took shape. The basic function of a Vocoder is characterized by an
analysis of the input signal, usually speech but other type of inputs can
also be very interesting. In a special filter bank, a spectral analysis is
performed and signals are developed which follows the amount of spectral
energy in each channel. Another part of the analyzer tests if there are
unvoiced or voiced sounds at any particular time and extracts the pitch of
the voiced sounds. The output section of the vocoder consists of a
stereophonic synthesis filter bank which assembles the new synthetic speech
from the characteristic filter envelopes from the analysis stage together
with an external or internal replacement signal.

What makes MATRIX different to the vocoders in the past ?

Precise analog modelling 8-pole filters and extremely fast envelope
followers for unprecedented resynthesis quality.

New voiced/unvoiced detection and pitch extraction algorithms for high
intelligibility.

Stereophonic synthesis filter bank preserves the spatial characteristic of
the replacement signal.

Easy to use interface.

Latency free operation.

Features:

The Voice Coder

* 32 channel filter bank.
* stereophonic synthesis.
* voiced/unvoiced detection
* Pitch tracking
* Formant shift
* Pause filling
* Channel matrix
* Pan position and level for each channel.
* 16 internal oscillators.
* Easy user interface.

http://www.virsyn.de

Download File Size:7.89 MB

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