R*S Stereo Mixer Questions

Discussing some incredible modules that don't quite fit into the other forum categories.

Moderators: Kent, luketeaford, lisa, Joe.

Post Reply
User avatar
luketeaford
Super Deluxe Wiggler
Posts: 1846
Joined: Wed Jan 08, 2014 9:54 pm
Location: Columbus, Ohio
Contact:

R*S Stereo Mixer Questions

Post by luketeaford » Sat Sep 07, 2019 6:35 am

I have been considering getting the R*S Stereo Mixer for a couple of years now, but I was wondering if someone could help me understand how it works:

Possibly this is particular to the Eurorack version...

1. AUX L and AUX R inputs are audio inputs, but what does the arrow under them mean? I would guess IN 2 is normalled to AUX L and IN 1 is normalled to AUX R?

2. How much difference do the THAT2180B (or A or C) ICs make? The manual says A is "better, more $$$"

https://randomsource.net/docs/RandomSou ... ro_1.3.pdf

3. Does anyone use it with the low pass filtering CV mode and if so can you comment on that? I think I would tend to prefer the "plops" and "abuses" the manual references. It seems using an SSG or DUSG to slew the incoming CV slightly would solve that externally without needing to opt-in to the more difficult trimming procedure.

User avatar
JesperP
Learning to Wiggle
Posts: 18
Joined: Mon Mar 21, 2016 11:32 am
Location: Reykjavik
Contact:

Post by JesperP » Sat Sep 07, 2019 2:42 pm

Aux L and Aux Rare external inputs that bypasses the gain and pan controls. Aux L being hard panned to Out L and Aux R to Out R.

1: the arrows indicates the direction the pan moves for the two channels. In the L ch the pan moves from L to R with positive cv’s and the pan pot all the way ccw. The R channel you need to turn the pan pot all the way cw to get the same response.
2: not much difference soundwise as I understand it. I think I put type B in mine.
3: I didn’t do that option on mine. I prefer just to slew my cv’s if I want smooth movements.

It’s a killer module capable of busting your speakers if you’re not careful combining manual gain with cv control. The only thing you have to be aware of is that the inputs bleeds a tiny bit through the aux inputs so you won’t get complete silence. There’s an easy mod that you can do that eliminates this.
Last edited by JesperP on Sat Sep 07, 2019 4:10 pm, edited 1 time in total.

User avatar
Corrupt
Wiggling with Experience
Posts: 252
Joined: Tue Jul 06, 2010 6:34 am

Post by Corrupt » Sat Sep 07, 2019 4:02 pm

I think it sounds pretty crappy at any setting beyond cleanish normal VCA gain, so not a great distortion or drive or anything like that. And somehow the CV ranges don't work anything like as nicely as the STS X Fader (don't have an UAP but have heard a friend say that sounds better too). The panning is fine.

That module was the only disappointment on my La Bestia II, much as I hate to admit it.

syncretism
Morbidly self-aware and liking it
Posts: 1494
Joined: Sun Jan 25, 2009 7:05 pm
Contact:

Post by syncretism » Sun Sep 08, 2019 7:06 pm

I’ll echo Corrupt’s sentiments, here. Apart from the balanced outputs, I’m somewhat underwhelmed but this module. I really don’t like the sound of it overdriving, either.

User avatar
luketeaford
Super Deluxe Wiggler
Posts: 1846
Joined: Wed Jan 08, 2014 9:54 pm
Location: Columbus, Ohio
Contact:

Post by luketeaford » Sun Sep 08, 2019 8:49 pm

Thanks for the responses -- I am a little afraid of the speaker breaking aspect of it since I'm hoping to put my Serge system in my living room and let whoever drops by play with it, but I might have to be careful with that.

In light of this it seems non-essential since I really like the top section of the VCM and the Active Processor used as a VCA sounds good to me.

User avatar
Biom
Wiggling with Experience
Posts: 451
Joined: Thu Jul 18, 2013 8:57 am
Location: moskwa

Post by Biom » Mon Sep 23, 2019 2:15 am

luketeaford wrote:I am a little afraid of the speaker breaking aspect of it
That's pretty normal serge vca's behaviour. Lots of gain, which is more good than bad, I think.

May I ask you, if you are considering the 4u or the 3u module?

I've been puzzled with the same question regarding the 3u serge and came to conclusion (by playing with the 4u) that serge vca's have no "magic". That is just an auditory/subjective observation and I'm very interested, what option you went for finally.

harolddonnelly
Veteran Wiggler
Posts: 526
Joined: Fri Mar 13, 2009 3:00 pm
Location: Vancouver, BC

Post by harolddonnelly » Sat Oct 05, 2019 10:56 pm

Corrupt wrote:I think it sounds pretty crappy at any setting beyond cleanish normal VCA gain, so not a great distortion or drive or anything like that. And somehow the CV ranges don't work anything like as nicely as the STS X Fader (don't have an UAP but have heard a friend say that sounds better too). The panning is fine.

That module was the only disappointment on my La Bestia II, much as I hate to admit it.
Are you experiencing any bleed from the outputs when using just using the normal ins when the volume is all the way off?

User avatar
warnton
Wiggling with Experience
Posts: 403
Joined: Thu May 10, 2012 9:49 am
Location: Austria

Post by warnton » Sat Oct 05, 2019 11:39 pm

no bleeding at al in the 3U version

User avatar
MindMachine
weekend warrior
Posts: 6996
Joined: Sun Aug 02, 2009 1:45 am
Location: Santa Susana Field Lab

Post by MindMachine » Sun Oct 06, 2019 2:09 am

Biom wrote:
luketeaford wrote:I am a little afraid of the speaker breaking aspect of it
That's pretty normal serge vca's behaviour. Lots of gain, which is more good than bad, I think.
Do not let folks just diddle with a Serge output VCA. You will lose speakers, hearing or cats. Huge gain. Huge sound. Put a governor on it.
FS: Pedals and Euro modules, Delta Labs
viewtopic.php?f=74&t=233636&p=3287718&h ... e#p3287718

User avatar
Corrupt
Wiggling with Experience
Posts: 252
Joined: Tue Jul 06, 2010 6:34 am

Post by Corrupt » Sun Oct 06, 2019 3:09 am

harolddonnelly wrote:
Corrupt wrote:I think it sounds pretty crappy at any setting beyond cleanish normal VCA gain, so not a great distortion or drive or anything like that. And somehow the CV ranges don't work anything like as nicely as the STS X Fader (don't have an UAP but have heard a friend say that sounds better too). The panning is fine.

That module was the only disappointment on my La Bestia II, much as I hate to admit it.
Are you experiencing any bleed from the outputs when using just using the normal ins when the volume is all the way off?
No. I actually never use this module without one or two scaling processors. Feels so wasteful but ¯\_(ツ)_/¯.

User avatar
luketeaford
Super Deluxe Wiggler
Posts: 1846
Joined: Wed Jan 08, 2014 9:54 pm
Location: Columbus, Ohio
Contact:

Post by luketeaford » Sun Oct 06, 2019 10:26 am

Thanks for the advice, folks-- I will stick with APROC and VCM in this system. I never thought I'd say it, but I think the serge is raw and loud enough as is :lol:

User avatar
ilya.n
Common Wiggler
Posts: 142
Joined: Wed Oct 01, 2014 7:57 pm
Location: Sydney, Australia

Post by ilya.n » Mon Oct 07, 2019 7:52 am

So, just to confirm, if I put Gain to maximum (without VCA modulation plugged in) it sounds MASSIVELY QUITER comparing to the piercing loudness of it when being modulated by a DUSG output... this is correct behaviour?
Thank you.

syncretism
Morbidly self-aware and liking it
Posts: 1494
Joined: Sun Jan 25, 2009 7:05 pm
Contact:

Post by syncretism » Mon Oct 07, 2019 8:50 am

That’s how mine works.

mestlick
Common Wiggler
Posts: 92
Joined: Mon Nov 23, 2015 11:33 am
Location: Colorado

Post by mestlick » Mon Oct 07, 2019 3:59 pm

I think of the gain knob more as an offset to the modulation, and not a control of it's own. With a full DUSG modulation I have gain at 9:00, and make small adjustments from there.

I patch a constant voltage to the gain cv if I want to hear something w/o modulation.

(this is on LW 4U, but I'm guessing all the circuits are similar)

(I've also found similar behavior on the 73-75 gate. It requires that the gain knob be about 9:00 for normal use, and does not really get very loud w/o modulation)

User avatar
woodster
Super Deluxe Wiggler
Posts: 1345
Joined: Mon Mar 05, 2012 9:36 am
Location: UK

Post by woodster » Thu Oct 10, 2019 11:19 am

warnton wrote:no bleeding at al in the 3U version
My (v1.3 PCB) 3U version bleeds very noticeably.
I think I saw a Logan Erickson post on Farcebook about a 10k Resistor to ground on the Aux inputs fixing it.
I hope to try out that modification soon as it's a simple thing to try and the bleed is indeed very irritating.

harolddonnelly
Veteran Wiggler
Posts: 526
Joined: Fri Mar 13, 2009 3:00 pm
Location: Vancouver, BC

Post by harolddonnelly » Sat Oct 12, 2019 8:02 pm

woodster wrote:
warnton wrote:no bleeding at al in the 3U version
My (v1.3 PCB) 3U version bleeds very noticeably.
I think I saw a Logan Erickson post on Farcebook about a 10k Resistor to ground on the Aux inputs fixing it.
I hope to try out that modification soon as it's a simple thing to try and the bleed is indeed very irritating.
Anyone experiencing bleed with the 4U V1.2?

Chorg Dorgon
Learning to Wiggle
Posts: 2
Joined: Mon Mar 30, 2020 7:17 pm

Re:

Post by Chorg Dorgon » Mon Mar 30, 2020 7:20 pm

harolddonnelly wrote:
Sat Oct 05, 2019 10:56 pm
Corrupt wrote:I think it sounds pretty crappy at any setting beyond cleanish normal VCA gain, so not a great distortion or drive or anything like that. And somehow the CV ranges don't work anything like as nicely as the STS X Fader (don't have an UAP but have heard a friend say that sounds better too). The panning is fine.

That module was the only disappointment on my La Bestia II, much as I hate to admit it.
Are you experiencing any bleed from the outputs when using just using the normal ins when the volume is all the way off?
I have lots of bleed!!

Chorg Dorgon
Learning to Wiggle
Posts: 2
Joined: Mon Mar 30, 2020 7:17 pm

Re: R*S Stereo Mixer Questions

Post by Chorg Dorgon » Mon Mar 30, 2020 7:27 pm

I bought this mixer off of reverb and the guy I bought it from is saying that in order to achieve silence, I need something to further attenuate my signal before it goes into my interface. the only reason why I'm asking on here is, am I crazy? in the insane amount of stuff I've read about Serge designs, never has anyone mentioned the fact that silence cant be achieved without(!) some kind of attenuator. like, you cant plug this synth into any amp it seems like without an attenuator. this just totally doesn't make any sense to me. anyone have any wisdom to share?

User avatar
thetwlo
Super Deluxe Wiggler
Posts: 4975
Joined: Wed Apr 16, 2008 4:05 pm
Location: East Bay, CA US

Re: R*S Stereo Mixer Questions

Post by thetwlo » Mon Mar 30, 2020 8:11 pm

I love this thing!(3u) Just tested, there is slight bleed when turned all the way down for higher frequencies.
I'm using this as the final stage mostly, seems very quiet, never noticed bleed--until looking for it.

Audio rate modulation sounds especially great!

Post Reply

Return to “Buchla, EMS & Serge”