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 Forum index » Instruments and Equipment » Modular Synthesis
how to start a sequencing Doepfer case system?
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sonictransportsystem



Joined: Aug 18, 2006
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Location: Portugal
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PostPosted: Thu Dec 29, 2011 8:35 am    Post subject: how to start a sequencing Doepfer case system? Reply with quote  Mark this post and the followings unread

Hello to everyone,

This Christmas i receive a Doepfer 6u case from my wife, and now i want to start buylding a modular synth in eurorack format. Wink

Cause i have the Doepfer Dark Energy, i want to start my system oriented to sequencing, to make sequences with the DE.

I thought about sarting with the A-155 and the A-156 modules, and later i will buy a A-190-1 for the system receive midi clock from my software sequencer.

About the clock divider i want to know if its a necessary module for this initial and the later midi configuration, with the A-190-1 (cv/midi/sync module)

If you have a better idea about a sequencer oriented doepfer system, please say something Wink

Cheers

Pedro Dias
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BobTheDog



Joined: Feb 28, 2005
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PostPosted: Fri Dec 30, 2011 9:32 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi Pedro,

Well I'm not an expert but I think you are going to need some clock generator of some type, a LFO would do or maybe a A-154.

Or you could save the rack space and get a Dark Time Smile

Cheers

Andy
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sonictransportsystem



Joined: Aug 18, 2006
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PostPosted: Fri Dec 30, 2011 11:03 am    Post subject: Reply with quote  Mark this post and the followings unread

BobTheDog wrote:
Hi Pedro,

Well I'm not an expert but I think you are going to need some clock generator of some type, a LFO would do or maybe a A-154.

Or you could save the rack space and get a Dark Time Smile

Cheers

Andy


Im going to use the Dark Energy LFO1 output to give clock! Wink

Cheers
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BobTheDog



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PostPosted: Fri Dec 30, 2011 12:03 pm    Post subject: Reply with quote  Mark this post and the followings unread

Good idea!

Told you I wasn't an expert Smile
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ndkent



Joined: Jan 03, 2006
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PostPosted: Sat Mar 10, 2012 5:53 pm    Post subject: Reply with quote  Mark this post and the followings unread

Lets see...

I you use your only LFO for clock then you don't have an LFO for modulation. You could clock with the A-191-1 though I believe you would then have to send MIDI clock to use the sequence.

You don't have to get a MIDI to CV converter as a module though there is an advantage to have it inside your system. To some outside the case has advantages too.

The A-156 isn't essential but it makes the use of an analog sequencer much easier and to many people much faster.

An A-150 is not essential but lets you use the A-155/A-154 in 16 step mode rather than 8 step mode
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Etamin



Joined: Jan 05, 2011
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PostPosted: Sun Jun 24, 2012 4:05 pm    Post subject: Any Progress? Reply with quote  Mark this post and the followings unread

Hi Sonic...

Did you make any progress with this?

From my reading on the Doepfer site, A-150 plus A-155, and A-154 does not give you 16 steps, but you need to add a second A-155. Of course, I could be mistaken on that Confused At that point, or even with only one A-155, A-150, A-154, I would think DarkTime would be better - bit pricier than that combo, but saves a ton of rack space and gives you MIDI I/O also, with clock sync to or from other MIDI.

I do not have this equipment, but have been reading up recently as I am interested in sequencer options right now.

Peter
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ndkent



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PostPosted: Sun Jun 24, 2012 4:44 pm    Post subject: Reply with quote  Mark this post and the followings unread

One A-155 and a switch will do 16 steps, you have 2 rows of 8 steps going out on 2 CV outs, you fire the switch on one of the 8 steps and you've switched rows until you file the switch again. What you can't do is something trickier like have one row alter the clock speed or use a second CV in parallel to do something else at the same time like open the filter some amount on some notes. You can do that with 8 but not 16 steps until you get a second A-155.

Dark Time is a ready to go old school sequencing system with nice extras like MIDI clock to tempo, quantitizer, stop/skip/jump switches. I don't have one so I don't know if it's easier to use but it probably looks like the popular uses are easy to use

That said the A-100 series modules will do a pile of more advanced things due to having a lot more CV inputs and outputs. There are a lot of patchable options especially once you add the A-154 controller. Even though the A-100 series modules are admittedly pretty space filling in a rack, what struck me is the patching options goe way beyond many other people's step sequencers
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Etamin



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PostPosted: Sun Jun 24, 2012 5:27 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hi ndkent

Thanks for the added info. So many choices, I was mostly taken by the stadalone enclosure and MIDI I/O of the DT. However, I have seen videos of people creating great sequences just with things like clock dividers, so maybe just adding clock and switch modules is actually a more flexible way to go. I have some of the Symple SEQkits that I am messing with now, trying to see if they can do what I want, and building simple dividers with CMOS.

Peter
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ndkent



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PostPosted: Sun Jun 24, 2012 6:52 pm    Post subject: Reply with quote  Mark this post and the followings unread

One would generally not make a good melodic sequence with *just* clock dividers. Generally you have a mixer that deals with CV. You could take an A-160/161 combo and run each step to a mixer input that passes DC. That means instead of a uniform +5v or whatever the divider puts out you get a pulse of CV you could use for pitch, especially with that combo, since each step holds, so it's not a tiny short pulse that may bot get far. Anyway that's a melodic result.

For a rhythmic result many synthesists divide with different intervals and perhaps logic applied and then take the different triggers and make different sounds for each trigger out. Something like a 4ms RCD puts out lots of different divisions at the same time
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Etamin



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PostPosted: Sat Jun 30, 2012 3:10 pm    Post subject: Reply with quote  Mark this post and the followings unread

Thanks for elaborating. Do you know any other good tricks for alternative sequencers?

Peter
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sonictransportsystem



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PostPosted: Sun Dec 16, 2012 7:01 am    Post subject: Reply with quote  Mark this post and the followings unread

ndkent wrote:
One A-155 and a switch will do 16 steps, you have 2 rows of 8 steps going out on 2 CV outs, you fire the switch on one of the 8 steps and you've switched rows until you file the switch again. What you can't do is something trickier like have one row alter the clock speed or use a second CV in parallel to do something else at the same time like open the filter some amount on some notes. You can do that with 8 but not 16 steps until you get a second A-155.

Dark Time is a ready to go old school sequencing system with nice extras like MIDI clock to tempo, quantitizer, stop/skip/jump switches. I don't have one so I don't know if it's easier to use but it probably looks like the popular uses are easy to use

That said the A-100 series modules will do a pile of more advanced things due to having a lot more CV inputs and outputs. There are a lot of patchable options especially once you add the A-154 controller. Even though the A-100 series modules are admittedly pretty space filling in a rack, what struck me is the patching options goe way beyond many other people's step sequencers


Hi, the switch that you talk to turn the A 155 in a 16 steps sequencer its like a switch module like the A 150 or A 151....Can you explain me better how to do it....Have you ever tryied?

Thanks a lot Wink

Pedro
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