Vocoder 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.

Block 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 Jürgen 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.

inside

Level and summed output