Just my little pearls of knowledge

As far as I understand it the practical application of lin/exp mixers
this is that an exponential curve gives lot of control over the lower
range as opposed to the linear curve which gives more control over
the overall balance. For example, a mix balance of 1:2 1:3 is much
easier to achieve using a linear mixer, while a subtle balance of
1:1.001 would be done with an exponential one.

Also the linear VCA is primarily useable in the middle of the signal
path (for instance a VCA before a VCF) where linear control is
easier. For our ears an exponential volume curve is more natural
because of the way they work. Therefore an exponential VCA is usually
used at the end of the signal path.

Regards,
Patrick

--- In Doepfer_a100@yahoogroups.com , "Roel Steverink"
<r.steverink@w...> wrote:

> Hi Ethan, Tim, Florian and Bakis,
>
> Thanks for all this great info!
> I have been experimenting with the options you gave me.
> I noticed some strange things.
> First I patched the A-110 into the in of the A-131 (Exp.)
> and turning up the gain, nothing was heard until I
> reached position 6. I repeated the same experiment with
> the A-130 (Lin.) I also began to turn up the gain and
> immediately at position 2 I began to hear the continious
> drone.
> So there's the big difference which must be due to fact
> that one is the exp. and the other the linear VCA.
> Now, I'm curious at which position will they be equal in
> volume. Can it be before they reach full gain
> Nop, your right Florian both are equal in volume only
> when they reached full gain (=10).
> So I happily conclude that there's nothing wrong with
> my VCA's!
> Before I forget the both in's were at position 8. And the
> general out also on position 8.
> But when I turn both in's (from the two VCA's) to 10,
> I immediately hear that the linear gives more power!
>
> I also have to say that I directly plugged the A-100 out to
> my mixer in this case.
>
> In the next example I patched 3 waveforms (pulse, triangle and
> sinus) into the A-138 mixer, the out of the mixer goes to
> the audio in of the A-121 Multimode filter. Filter low out
> first into audio in of A-131 and the A-130 (settings of the
> VCA's are the same as above). There's barely any change.
> Same picture the linear gives a slight more power then the
> exponential.
>
> Now, when I plug the low out of the A-121 directly in the
> input of the A-138 mixer (lin) the volume is cranked up
> several levels. How come Using this mixer means a more beefed
> up sound then using one of the VCA's
> I believe this picture will be the same if one uses the
> A-138 mixer (exp)! Or am I wrong here
>
> Can anyone tell me what's the difference between
> the A-138 exp and lin. mixer
> The same goes for both the exp and linear VCA's.
> I have to expand with more VCA's, cause 2 are to little.
> But which one should I take
> Any ideas!
>
> Thanks,
>
> Roel.