• Hi let's make some vocoder effect
  • This is ems vocoder 2000 I want to make it
    1600 x 900 - 138K
  • Here's a good video rundown of how it works - anyone willing to help on this?

  • It looks like it does some magic by letting through the initial noise burst (voiced consonants) to make it a little more intelligible.
  • The voiced/unvoiced detector is a high pass and low pass filter each fed into an envelope follower. The output of the envelope followers is then compared. If the low pass is higher than the high pass, the sound is considered voiced, otherwise it's unvoiced. I had a pretty good link but I can't seem to find it now. The EMS 2000. was a 16 band vocoder, so you would need 16 filters plus the ones for the voiced/unvoiced detector. According to one description I found the filters were 6th order devices.
  • Didn't @Dcramer make a vocoder in Audulus?
  • http://forum.audulus.com/discussion/20/new-patches/p3

    Yeah he did! Unfortunately it is ancient... BTW did there used to be a sample node?
  • I found the link I looked at before. This is an example patch using the Nord Modular soft-synth. It uses 8 bands with 2nd order (12dB/octave) filters. It should port to Audulus pretty easily. The original EMS configuration of 16 bands of 6th order filters might be too much CPU load. I forgot you need a pair of filters for each channel so that would make 34 filters in total. Here's the link: http://electro-music.com/nm_classic/014_threads/Folder/Speech/SpeechSynthesis&Processing.htm
  • Just as an experiment I built a 16 band unit with 6th order filters and as I expected, I'm at 100% on my iMac even without the voiced/unvoiced detector pulse generator etc. I'll try less bands and lower order filters.
  • I actually use the Nord vocoder! I have a micromodular from back in the day and the vocoder is one of the presets that is left on it. I can vouch for 8 bands of 2nd order filter.
  • It looks like 8 bands using 2nd order filters will be OK from a CPU load perspective, at least on the Mac. I’m having some problems with the mic and ADC nodes on my Mac so I don’t currently have any way to get an audio signal into Audulus. Testing will have to wait until I get it sorted out.
  • Made one eons ago (5 years actually! Wow)


    Not sure if this still opens in recent versions, will try dig it up
  • Nice! Audulus 2 style :D
  • Yes but it's so bad that adulus 3
    can't load projects which are made with adulus 2 version
  • Vocoder has an internal oscillator so you can talk without playing synthesizer . So how to make it?
  • The 16 BP filters and an envelope follower is not a problem
  • How to make for example left is a modulator and the right is a carrier?