Re: [Doepfer_a100] Vocoder

From Florian Anwander
Sent Thu, Jul 23rd 2015, 15:28

I owned a MAM VF-11, a A-129 System and a Roland SVC-325. I sold them 
all, and own now an Electrix WarpFactory, a Alesis Metavox and the 
NordModular. All three are digital

I have to say: for any standard voice orientated vocoding, I would use 
always a digital vocoder. They sound not only way better. No, they are 
miles ahead. What the Electrix does is incredible. Price on ebay is 
between 170 and 230 Euros.

If I would want an analogue vocoder again, then only because digital 
vocoders have a timelag, which annoys if you use percussive sounds for 
the modulator.


The other argument for an analogue vocoder would be its patchability. I 
really appreciated the A-129-2 as VC filterbank. Also the 129-1 as 
frequency selective envelope follower is nice, but a A-119 with a 
multimode filter does usually a better job.

But I always missed other features on the A-129 system. For instance I 
do find the fixed centerfrequencies of the filterbands as very limiting. 
They are trimmed to hit the typical resonance frequencies of vocals. And 
even worse: they are trimmed to hit the typical resonance frequencies of 
german vocals. I once wanted to use the voice of a turkish speaker, but 
turkish vocals are much darker than german ones. The vocoding with the 
A-129 was disappointing. I don't blame Dieter for it, but it is 
something that should be kept in mind, if someone designs a new vocoder.

What I would want is a vocoder with VC-Bandpasses in the analysis and 
synthesis section. The center frequency of each band should be 
adjustable in a certain range, it should be possible to shift the center 
frequencies of the whole bank and also one could adjust the spread of 
the bands. Also I'd like to have the resonance adjustable.

So I doubt that a "simple vocoder" on analog basis does make sense. The 
recent three auctions for an Alesis Metavox here were between 45 and 109 
Euros (and the Metavox sounds at a least as good as the MAM or a Korg 
VC10).  Beat that price with analogue gear.

If someone ever will build an analog vocoder, then it should be more 
sophisticated than the A-129.

Just my 2cts.

Florian


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