roeland wrote:Is there really nobody that can answer my question about the way the EQ bands in Scarlet are interacting?
The original EQ Scarlet is based upon and also the original models for White EQ, Green and Ivory are all parallel EQ's. Parallel interaction between EQ bands differs highly from the serial interaction which is found in most console and preamp EQ's. The parallel interaction is a decisive part of the sound of the Sontec, Pultec, M*****c, GML and Massive Passive EQ's.
As far as I can find out on this forum, no Aqua EQ has a parallel structure. If that is true, Scarlet, Green, Ivory and White - though they may be very good and beautiful sounding and will all capture a great deal of the analogue distortion and phase shift - miss a very decisive element of the models they are based upon.
One can achieve parallel EQ bands by putting Nebula instances - which only have one EQ band each - in parallel with the use of a chainer like Blue cat's Patchwork. Doing that makes a great difference! Using CD Soundmasters Sontec model or other sampled parallel EQ's in this way, alters their sound completely. Therefore I think it is rather relevant to know how things about parallel EQ interaction stand in the Aqua world. So could someone who knows please answer my question?
Yes, Scarlet works in serial mode, and so do all the other Acqua mixing eq's (Honey, Amethyst, Ochre...).
Other things I know for sure:
- pEArL is serial, just like the HW;
- the same is true for Emerald;
- White's two low bands work in parallel and interact with each other just like the HW.
Please note that in the original S****c (and G*L as well, among others) there are two distinct parallel blocks: the three parametric bands and the two shelves.
The shelves' operating frequencies are too distant from each other to make any relevant difference between serial or parallel configuration.
As far as the three mid bands, from our listening and analytical tests (and comparisons with the HW) it appears that the parallel configuration gives a significantly different result only when two bands work very close in the same frequency region, with a narrow Q. Most of times the difference is negligible.
In everyday use it's much more likely to have an interaction between any parametric band and one of the shelves, frequency wise. But remember that in the original HW parametric bands and shelves don't share the same parallel circuit: they are connected in series, so there's no interaction between them.
Saying this I don't mean that a parallel configuration isn't worth exploring in the future. IMO it's surely a very fascinating field.
Edit: Ooops... GC beat me to it!