Vocoder filter values

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nuromantix
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Vocoder filter values

Post by nuromantix » Tue Jun 30, 2020 5:27 pm

If you were making an 8 band vocoder, what frequency values would you assign the filters?
I found a list on the MFOS site that was:
low pass: 100 Hz
band pass:154, 208, 285, 395, 542, 720, 1013, 1495, 2000, 2546 Hz
high pass:3330 Hz

Does anyone know the values used on the SVC350 or EMS vocoders?
I am trying to improve the vocoder preset in the Eventide DSP4000.
I'm going to add voiced/unvoiced detection by comparing the outputs of the lowpass & highpass.

Synthiq
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Re: Vocoder filter values

Post by Synthiq » Thu Jul 02, 2020 9:24 pm

From the Roland SVC-350 service notes:
Bandpass filters: 150, 220, 350, 500, 760, 1100, 1600, 2200, 3600, 5200. 6000 highpass filter

The front panel of the EMS Vocoder System 3000 lists:
125, 185, 270, 350, 430, 530, 630, 780, 950, 1150, 1380, 2070, 2780, 3800, 6400

nuromantix
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Re: Vocoder filter values

Post by nuromantix » Fri Jul 03, 2020 6:24 am

Thanks, great info.

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