NGF Vocoder Project: Update

The dedicated NGF Vocoder Project website is now online. It can be found here. The NGF Vocoder Analyzer Site is updated. It can be found here with updated schematics and downloads for the documentation.

NGF Vocoder

NGF Vocoder

Vocoder Analyzer: level of individual filters and summarized output

Vocoder Analyzer: level of individual filters and summarized output

Vocoder : Analyzer

20141015_01Vocoder Front

The analyzer part of a vocoder has the function to divide the incoming signal into frequency bands and to generate an analog output signal per band in dependency to the signal level.

20141015_02Block diagram

Because i wanted to be flexible what filter architecture and frequency distribution to use, i made the filters pluggable. So you can easily change filters and test different configurations. For the first attempt i used the filter architecture suggested by J├╝rgen Haible who derived them from the EMS 5000 vocoder. Other filters will follow. I added four more filters and moved the frequency of the high- and low pass.

20141015_04inside

20141015_03Level and summed output