Patching With Doepfer Precision Adder | A-185-2
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- เผยแพร่เมื่อ 20 ต.ค. 2024
- The Doepfer Precision Adder is an awesome module with many creative uses. In this video, I walk through some patches to illustrate a few ideas.
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From The Doepfer Website:
doepfer.de/a18...
Module A-185-2 is a precision control voltage adder/buffer. Precision means that the amplification of the inputs without attenuators is exactly 1.00 and is suitable to add control voltages for the pitch control of VCOs (e.g. from keyboard + sequencer 1 + sequencer 2). Summing resistors matched to 0.1% are used to obtain an accuracy of 0.1% for the added voltages.
The module is equipped with four CV inputs: one with attenuator and three without attenuator. Each input is normalled to +1 V (i.e. if no plug is inserted the input contributes 1 V to the sum appearing at the output).
The input with attenuator can be used for common modulations (e.g. from an LFO, ADSR, Theremin, Pitch-Bender) for all VCOs connected to the output. The Lev.1 control is used to adjust the depth of the modulation, the first switch selects the polarity of the modulation. If no signal is connected to the first socket the attenuator works as a (fine) tuning knob because a voltage in the range 0...+1V (right position of the switch) or 0...-1V (left position of the switch) is added to the CV output. The Lev.1 control uses a logarithmic potentiometer to obtain a fine resolution in the lower range when input #1 is used for modulation or as fine tune control.
The inputs without attenuators are planned to add control voltages coming out of keyboards, sequencers, Midi-to-CV interfaces, ribbon controllers or other CV sources that follow the 1V/oct standard. For example the CV of a keyboard can be used to transpose the CV coming from a sequencer, or the CV of a slow sequencer can be used to transpose the CV from a fast sequencer.
Each input is equipped with a three-position switch that determines if the corresponding voltage is added (right position), subtracted (left position) or if the input has no effect (center position). If no plug is inserted the corresponding switch works as an octave switch for the lower three sections as the default 1 V are added or subtracted to the output voltage according to the switch position. The first switch can be used to add a variable voltage to the sum output. The variable voltage is adjusted with the Lev.1 control and the knob works then as kind of a (fine) tuning control.
The module is equipped with 4 outputs: three non-invertíng and one inverting ouput. An internal jumper can be used to connect the non-inverted or inverted output to the CV line of the A-100 bus. That way the module can used to control several VCOs that are connected to the same bus board as the A-185-2 (same functionality as A-185-1).
Man, I didn’t realise how much I need one of these until now… The seemingly never ending spiral down the modular rabbit hole continues to eat my wallet! Excellent video, cheers.
Thanks. At least these Doepfer Modules are relatively affordable.
@@braintree56Aye, very reasonably priced… Got one on order from Thomann, should be here next week. Looking forward to diving into this one!
Have you tried sending multiple pitch info to a precision adder, then sending to a quantizer, then sending multiple different quantized pitch info to a second precision adder?
If you're all tuned to C, E, G & B to keep it simple, you're on for a ride! All combinations are insanely musical.
Interesting - I'll have to give it a try. Thanks for the tip. There's so many approaches.
@@braintree56 totally. It isn't easy either to imagine that combining quantized pitch post quantizer will be musical. Yet, it is and this is where music shook me the most with my system.
Well, A-185-2 AND A-182-1 both look super useful now. Thanks for the demo!
Doepfer always delivers, and I'm glad to see people featuring their utilities. A whole lotta function for not a whole lotta ca$h!
I love Doepfer. I just bought a handful of new modules from them. Their switched multiples are really useful! I bought a few and am using them to route things to different places. Plus the switches make me feel like I'm operating a spaceship from a 70s sci-fi flick!
i got one of these in a bundle, along with the A-160-5 and A-183-2 (CLOCK MULTIPLIER/ratchet and attenuator/offset)....i use all 3 now, almost always. Another great Doepfer module that I have is the A-137-1 wave multiplier(folder). It will even accept line level and lower, so doubles as an external gear interface. Dieter does excellent modules.
Nice! I have the clock multiplier too. Definitely plan to add the polarizer and wave folder! Agreed. They are great modules.
Nice video!
To improve on this: use buffered mults when handling pitch cv. If you use passive ones (as this switched one is) your voltage drops. The quantizer compensates that if the voltage isnt too far off. But here you can actually hear it in the octave patch. The interval between notes sometimes is only a 7th and not the intended octave.
Excellent suggestion! Thanks! :)
That was crucial when I started to build my modular eurorack theremin. I was wondering why I'm losing pitch tracking and volume antenna worked really weird. Buffered multiple and a linear VCA solved the problems!
@@makiprido you have any demo and/or precise description of your theremin (doepfer I guess?) patch? 🙏
I ve been working on Allen Strange patches from his legendary book and since you have the adders before the quantizers, you could even use a straight up mixer instead of precision adders.
Yep! You would still need something to generate the voltages to mix together though and it might be hard to dial in particular intervals, but yeah! Same concept.
Just like I commented on the 156 quantizer video, I also have the precision adder but I have only used it in a limited way (transposing a sequence form the 960 up a 5th or down 4th)... thanks loads for opening my eyes to other possibilities... especially using 2 of them! (looks like I'll have to get another, damn!)
thanks bro
Perfect tutorial 👍🏻
Thank you! 👍 Glad you liked it.
Wonderful! Thank you!
Thank you, helpful since for some reason there is no manual for this. Strange Doepfer usually has good manuals.
Yes, the "manual" for this one is different... This was the closest thing I found to a manual: doepfer.de/a1852.htm
Great job sir, thanks for sharing, keep up the awesomeness.
Thanks! :)
Having 2 precision adder is better for U?
It kind of depends what you want to use them for. I actually have four at the moment and use them for all sorts of things. I really like these modules.
Regular CV control? I assume I could use a sequencer to change the pitch of another sequence???
Yep, you could probably do that. I've never done that, but I can't see why not. :) Very creative.
Doefper is cool, but sadly dont have separate buffers for 3 outs. I prefer VPME T43 adder, but it is more exepnsive.
Nice, that looks interesting (I already have the Doepfer).
Great suggestion! I'll have to keep my eyes out for this one.
Nice video. Love your energy and pure joy at your system and learning. This is what TH-cam is for.
The joranalogue adder is nice but more simple than this one. I have one and want a Doepfer. Both are good and different! As always, get both (if you can afford, which I cant 🤣)
I’m curious about how/whether you use the bus board control feature. Actually I’m totally perplexed about how that even works…
I don't. Partly because when I had multiple ones on there, they were interacting with each other and I didn't have as much control. Also, I'm changing my setup so much and using other non-Doepfer modules, that it's just easier for me to have it all laid out in front of me. There are jumpers on the back, when they are set to accept the busboard CV, it works in the same way as a patch cable. I'll put this on my list for video topics! I'm sure other people wonder about it as well (if they are even aware of it). I probably should become more familiar with it as well. :)
nice
Thanks
Teeenaaage Wasteland!….
They're all wasted!!!!
Do you listen to the result ? Your Octave tracking sucks. I´m not familiar with the modules, maybe the one that splits the V/oct is passive but needs to be a buffered one. Rock on.
Maybe. Thanks for the feedback. I'll look into it.