Showing posts with label Mixer. Show all posts
Showing posts with label Mixer. Show all posts

Tuesday, January 10, 2017

Doepfer A-135-4A/B/C Voltage Controlled Performance Mixer Modules Announced


The A-135-4A and B prototypes on display
at the Amsterdam Dance Event in
October 2016
In a previous blogpost I was rather excited about my own new A-138p/o Performance mixer combo.
I bought i just right before I knew that Doepfer was working on a voltage controlled version of this module...

On first impression, the new A-135-4A Voltage Controlled Performance Mixer looks quite the same as the non-cv-controllable A-138p Performance Mixer, only with extra LEDs for displaying the incoming CV voltages for all parameters (except Gain).

Module A-135-4B is the CV-input module, where 16 different control voltages can alter 16 parameters on the A-135-4A Mixer... The modules must be connected via an int 20pin ribbon-cable.

Module A-135-4C is a four-fold envelope follower with adjustable attack and release time for each channel.
The main function of the module is to derive four envelopes from the A-135-4A audio input signals. These voltages can be used to control parameters of the main module A-135-4A via the CV input module A-135-4B2. Typical applications are ducking (e.i. the signal of one channel is used to mute another channel more or less), as well as compressor and expander functions.

A-135-4A/B/C VC Performance mixer prototype
with the A-138o Output module
A-135-4B CV Inputs Module close-up
The modules of the A-135-4 series can be combined with the (non voltage controlled) mixer modules A-138o/p so that these can be used as output module for the A-135-4A. A-135-4A and A-138p can be connected together to the same A-138o to obtain e.g. four fully voltage controlled channels (A-135-4A) and four manually controlled channels (A-138p).

This combo will probably available before spring of this year.

Source:
Preliminary info via http://www.doepfer.de/A1354.htm

Sunday, January 08, 2017

Doepfer A-138p/o Performance Mixer Combo

The latest addition to my modular system is the A-138p/o Performance Mixer set of modules...

Modules A-138p/o are a simple performance mixer that I use as and end-mixer for all the signals coming out of my A-100, and for merging my TB-303 audio, before it all goes into my mixing-desk.

Module A-138p is the 4-fold input module, A-138o is the output module that can be combined with one or more A-138p.
I read somewhere that the module didn't start off as commercial product, but as a personal hobby-project of Dieter Doepfer who just needed this module for himself... It did go through quite a few prototype stages before it was released in this final form.

The A-138p has 4 input channels, with separate controls and a mute
switch for each channel.
A-138p/o in my current setup, with
the aux send/return patched through
the Qu-Bit RT-60 DSF Multi fx
The controls are for Gain (control to adapt different audio levels -also for external signals), Level (the main volume control), Aux and Panning
An internal jumper for each channel lets you choose between Aux pre/post main Level control.
There is an internal connection to the output module and to other A-138p modules
The A-138p requires the A-138o Output module (no stand-alone use)

The A-138o Output module features level controls for Left, Right and Aux,  and output sockets for Left, Right and Aux (3.5 mm mono sockets), it requires at least one A-138p (no stand-alone use)

I must say that I am extremely happy with these new modules. It's just what I needed to create an easier workflow in my system.
I especially like the Aux send/return function, which makes it a perfect companion for my Qu-Bit RT-60 DSP multi-effects module, but you can also use it for sending audio to a BBD-module, a filter or spring reverb for example.
Alternatively the Aux send can be used for pre-listening in combination with a headphone.
Like any other Doepfer module this one is easy to use too, the controls are very basic and straightforward. These modules are now the heart of my A-100 system.

About a week after I ordered mine, the word got out that Doepfer was working on another version of this module (A-135A/B/C) with dedicated CV inputs for each parameter and a Quad Envelope follower module with attack and release controls for each of the 4 channels.
Some prototypes of these modules are already touring through the world, I did see one in the Alex4 rack at the Amsterdam Dance Event in October of last year.
You can read more about that in my next blogpost, but I must say it looks promising.
At the moment I don't really need such a module or have the HP space for all of them. but I do see some exciting possibilities in these modules.

Source: http://www.doepfer.de/home_e.htm

Wednesday, December 10, 2014

New Malekko Modules Are Now Shipping

Buffered
Multi
Mix 4
Unity
Mixer
The people at Malekko have been crafting a new series of Eurorack modules from affordable creative synthesis designs to performance tools

They are very happy to announce the first three in this series are now available through your favorite modular retailers!

MIX 4
This 3hp 4-channel mixer is the first to literally fill the odd hp gap - Harvestman users rejoice!
MIX 4 also features DC coupling for mixing low frequency as well as CV.

UNITY MIXER
The 2hp Unity Mixer is a little powerhouse of unity gain mixing capability. 2 sets of 3 inputs (1 out per set) offers up your basic configuration, then hit the SWITCH button to allow for 6 total inputs (1 out). Unity Mixer also supports CV so the SWITCH button makes this module a great option for rerouting combinations of signals on the fly and is perfect for live performance!

PERFORMANCE BUFFERED MULT
The 2hp Performance Buffered Mult features 2 sets of 3 outputs (1 audio or CV signal in with 3 buffered outs) and the SWITCH button allows for a total of 6 outputs without signal loss for on the fly multiplying.

Monday, August 04, 2014

Doepfer A-138u Dual Micro Mixer announced

Doepfer recently announced a new 4HP wide 'Dual Micro' (2x3) mixer module on their website.

A-138u
Module A-138u is a simple, low-cost mixer with two units.
Each unit is equipped with three inputs and one output.
The upper unit has for each input a trimming potentiometer available that allows to adjust the amplification in the range 0...+1 for each input (factory setting is 1 for all inputs).
The inputs of the lower unit all have the same amplification +1.

The output of the upper unit is normalled to the first input of the lower unit.
That way the module can be used also as a mixer with five inputs: for this the inputs 1, 2 and 3 of the upper unit and the inputs 2 and 3 of the lower unit are used.
The sum output for all five signals is then the output of the lower unit.
As soon as a plug is inserted into input 1 of the lower unit the module becomes a dual 3-in-1 mixer again.
Inputs and Outputs are DC-coupled, i.e. audio and control signals can be mixed.

Application examples:
- Mixer for audio signals, e.g. three VCOs preceding a VCF, when the amplifications are adjusted slightly different no signal extinction occurs during the beat of the VCOs
- Mixer for control voltages (e.g. LFOs, envelope generators, random voltages)"

The module is planned for fall 2014, for a price around Euro 45.00
Price and release date are still without obligation !

Friday, October 11, 2013

Doepfer A-135-1 Quad VCA/ VC Mixer Tutorial Videos by Raul Pena

Time for another new tutorial series by Raul Pena.
The subject this time is the Doepfer A-135-1 Quad VCA /Voltage Controlled Mixer (version 2)

Video 1: Doepfer A135-1 QVCA/VCMIX basics

" A short description of the beasic features and functions of the Doepfer A135-1 Quad Linear VCA, Voltage Controlled Mixer. Sound and Video by Raul Pena."

Video 2: Doepfer A135 Quad Linear VCA/ Voltage Controlled Mixer Audio Demonstration One
" A short demonstration of A135 Quad Linear VCA with oscilloscope views to show how external cv effects amplitude of an audio signal. Sound and Video by Raul Pena."

Video 3: Doepfer A135 Quad Linear VCA/ Voltage Controlled Mixer Audio Demonstration Two

The second of two Audio Demonstrations of A135 Quad Linear VCA with oscilloscope views to show how external cv effects amplitude of an audio signal. Sound and Video by Raul Pena.
New videos in this series will be added to this post weekly on Thursdays.

Check out Raul's latest survey at http://www.surveymonkey.com/s/K3Z9PVF
Other places to find Raul's World of Synths on the Web:

Thursday, October 10, 2013

SiteTip: Mheontube YouTube Channel

It looks like another Eurorack fan has hit YouTube...
Mheontube started to upload interesting short Eurorack snippets since yesterday, basic patches made with a small setup of only 4 Doepfer modules (so far)...

Check the full playlist (the last 7 videos were uploaded in one day) HERE

Video 1: Chirp Chirp Analogue by mheontube

-no description available

Video 2: Android's Talk by mheontube

-no description available

Video 3: Grumpy Android by mheontube

-no description available
Uploaded by mheontube (subscribe!)

Monday, June 10, 2013

Doepfer A-135-1 Voltage Controlled Mixer Re-Design

Old version of the A-135
The original A-135 module was a simple quad voltage controlled mixer.
It was made of 4 independent linear VCA's, mixed to one common output.
For each VCA the following inputs and controls were available: audio input with attenuator, control voltage input with attenuator, gain (pre-amplification).
The VCA's were realized with high-quality CEM VCA's (CEM3381).

The module could be used for voltage controlled mixing of up to 4 audio signals with separate control voltages (e.g. by LFO's, ADSR's, Random, Shepard generator, MIDI-to-CV interface or other control voltage sources).

In June last year, Doepfer announced the re-design of several modules because of shortage of CEM3080 Chips that were used in this A-135 and other modules.
This year a few of these re-designed modules were released, each in a slightly extended/ improved version (like the A-130/131 that are now also DC-coupled, and the recently announced A-141-2).*

A-135-1 Redesign of the A-135
This new version of the A-135 also has some nice extras in the form of a Sum Out and 4 single outputs for each channel instead of only one (Mixed) Audio output on the original A-135.
They've also managed to make it only 18 HP instead of  22 HP wide.

The new version of the A-135-1 is also able to process slowly varying control voltages because the signal in/outputs are DC coupled.

The new version is manufactured from May 2013 and is available now.

* More re-designs were also promised to us last year, like the A-107, A-116A-127, A-132-1, A-147, A-171), so that promises a lot for the future...

Find more about various Doepfer re-designs via http://patchpierre.blogspot.nl/search/label/Re-design

Monday, November 28, 2011

A-138 Linear/Exponential Mixer


Module A-138 is a simple four channel mixer that can be used for either control voltages or audio signals. (although i hardly ever use one for CV)
Each of the four inputs has an attenuator, and a master attenuator, so that the mixer can be used to interface directly with an external mixer, amplifier, etc.

There are two versions of this module:
A-138 a: potentiometers with linear response, especially suitable for control voltage mixing.
A-138 b: potentiometers with logarithmic/exponential response, especially suitable for audio signal mixing.

The latest version from April 2004 is an improved version of the module A-138b.
For the revised versions control In1 works as a DC offset generator (about 0...+5V) provided that no patch cord is plugged into socket In1.
If this feature is not required it can be deactivated by removing a jumper on the pc board.
In the summer 2004 the A-138a was introduced with this improvement.

In the summer of 2007 Doepfer also released a mix expander module A-138x, that increased the number of inputs of the A-138 by five.
That module was discontinued last year...