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Author Topic: Ratcheting?  (Read 355 times)

endreola

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Ratcheting?
« on: December 04, 2018, 10:18:41 pm »
Greetings fellow MB'ers.

Had recenty seen a video by Kris Lennox demonstrating that ratchting is possible on MatrixBrute (ref: https://www.youtube.com/watch?v=x9c20tw7l5A). 
Am stumpted as to how this was achieved and would love to understand how I can replicate it.  Any takers? :)

Nice work Kris.

Regards,
Dean


Vic-tor

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Re: Ratcheting?
« Reply #1 on: December 05, 2018, 08:43:47 am »
Hey,

I am guessing he is using a temp synced LFO (Saw) with a rate of 1/16 to modulate the volume (VCA in the Matrix), then uses the sequencer modulation (seq mod) track to modulate the speed of this LFO (up to 1/32).
Note how Step 7-8 and 14-15-16 have the top row lit up. That means there is some seq mod info active on these steps.
If needed I can explain this further when I get the time, let me know !


Victor
« Last Edit: December 05, 2018, 09:20:05 am by Vic-tor »

DrJustice

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Re: Ratcheting?
« Reply #2 on: December 05, 2018, 01:06:33 pm »
What Victor says - however, I think the example in the video does something else. Controlling the LFO speed with the MOD track requires a step set to 0% to bring the LFO speed back to its base setting after the "ratcheting" steps, which does not appear to be the case in the video. The guy with the video calls it "true ratcheting", which require actual triggering of the envelopes. Unfortunately, he has declined to share his method. I'm not at my MxB today, so I can't do any experiments... Back to you Victor :-)

Vic-tor

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Re: Ratcheting?
« Reply #3 on: December 05, 2018, 01:56:56 pm »
True, it seems I answered too fast without checking in details !

I tested the method I suggested and could hear that using a LFO to modulate the VCA does not sound like this (different envelope shape)

So the method of the video could involve patching things from the Matrix CV outs and clock/gate in. Will experiment when I get the time and share results if I find a good method :)




endreola

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Re: Ratcheting?
« Reply #4 on: December 06, 2018, 07:00:22 am »
Hey, I appreciate you both looking into this.

Based on Kri's comment that this was achieved "All internal; no outs", which sounds pretty promising.  From what I've seen thus far, most eurorack systems use clock dividers/multipliers/switches to produce this effect.  And then of course there's product that natively supports ratcheting, like the Doepfer MAQ16/3 https://www.youtube.com/watch?v=Lh_9vUWPHoo.  I don't own one but the workflow looks pretty easy :)

Maybe it's just me but his other comment "Arturia will likely create this as a feature in future updates.  But it can be designed without the need for a firmware update.".  So I process that as he had his unit modified to achieve that level of capability.


nazznomi

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Re: Ratcheting?
« Reply #5 on: December 06, 2018, 02:12:12 pm »
Apply LFO 1 or 2 amount to a custom location on the matrix. apply seq mod to the LFO amount with a high mod ammount. Apply the LFO to OSC 2 Ultra in the matrix with a high mod amount and route a cable from OSC 2 Ultra out to Gate in. Setting up a sequence with varying amounts of mod will change the amount of ratchet. Changing the LFO shape will change the nature of the ratchet.

DrJustice

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Re: Ratcheting?
« Reply #6 on: December 06, 2018, 03:19:38 pm »
Welcome to the forum, nazznomi!  :)

The method discussed requires no patching, only internal preset parameters. While the patching method sort of works, it's a bit hard to manage as the ratcheting will only happen in the period of the step that is not within the sequencer gate time; e.g. with 50% gate time, the ratcheting will happen for the last half of the step. You also need to have a step at 0% MOD to stop the ratcheting. Still usable of course, for its own variety of ratcheting.

Here's hoping for real ratcheting in the FW update - AFAIK, it's the most requested sequencer feature.
« Last Edit: December 06, 2018, 03:36:42 pm by DrJustice »

VAU

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Re: Ratcheting?
« Reply #7 on: December 07, 2018, 05:45:07 pm »
and would so nicely be possible with more Matrix pages...

endreola

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Re: Ratcheting?
« Reply #8 on: December 10, 2018, 08:05:52 am »

Am curious if anyone has been successful duplicating Kris's patch?

nazznomi

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Re: Ratcheting?
« Reply #9 on: December 10, 2018, 11:47:00 pm »
I've attached a preset. It's close. I'll try again when I have more time.

endreola

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Re: Ratcheting?
« Reply #10 on: December 12, 2018, 04:12:10 am »
Hey nazznomi, your efforts is greatly appreceated.  Will load up the patch after I get back into town.

Cheers

 

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