CV In for drummers?

Barong
Posts: 1
Joined: Wed Oct 16, 2013 2:29 pm

CV In for drummers?

Postby Barong » Wed Oct 16, 2013 3:09 pm

I just bought a QuNexus with the main purpose of using the CV IN 1&2 for a Roland KD-7 and FD-7 kick and hi-hat pedals. They are/were the standard Roland V-Drum pedals in their day. I have not seen anything posted about this kind of thing, but I figured that with a a little work that I should be able to:

1) Use the kick drum trigger to play a Sampler/DrumRack/whatever on a specific channel. I basically want to use the CV input to make my pedal trigger something in Ableton Live. Probably a kick drum sample to start with, but maybe more creative things eventually.

2) Use the FD-7 continuous control pedal to control stuff in Ableton. Probably wanna start with simply a dry/wet mix on an effect, but basically use the CV controller as a CC.

I just plugged the 1/4" kick drum plug into an 1/8" adapter and plugged it into the CV IN on the QuNexus. When I step on the pedal it seems that nothing happens at lower velocities, and then I get chromatic clusters of notes with each kick drum hit. For example, I'll get 12 Note on and 12 note off messages from C2-B3 with a bunch of "Control" message info. I've pasting a readout from "Midi Monitor" on Mac from just a single hit of the kick drum pedal below.

15:50:09.734 From Port 3 Control 2 Controller 112 5
15:50:09.734 From Port 3 Control 2 Controller 112 11
15:50:09.734 From Port 3 Control 2 Controller 112 16
15:50:09.734 From Port 3 Control 2 Controller 112 22
15:50:09.737 From Port 1 Note On 1 A3 58
15:50:09.737 From Port 1 Note On 1 A#3 127
15:50:09.737 From Port 3 Control 2 Controller 112 16
15:50:09.738 From Port 1 Note On 1 B3 127
15:50:09.738 From Port 1 Note On 1 C4 80
15:50:09.738 From Port 3 Control 2 Controller 112 11
15:50:09.740 From Port 1 Note On 1 C2 53
15:50:09.740 From Port 1 Note On 1 C#2 91
15:50:09.740 From Port 3 Control 2 Controller 112 8
15:50:09.740 From Port 1 Note On 1 D2 96
15:50:09.742 From Port 1 Note On 1 D#2 61
15:50:09.742 From Port 3 Control 2 Controller 112 3
15:50:09.742 From Port 1 Note On 1 E2 28
15:50:09.745 From Port 3 Control 2 Controller 112 0
15:50:09.745 From Port 3 Control 2 Controller 112 1
15:50:09.748 From Port 3 Control 2 Controller 112 0
15:50:09.750 From Port 3 Control 2 Controller 112 1
15:50:09.750 From Port 3 Control 2 Controller 112 3
15:50:09.752 From Port 3 Control 2 Controller 112 1
15:50:09.752 From Port 3 Control 2 Controller 112 0
15:50:09.764 From Port 1 Note Off 1 C2 0
15:50:09.764 From Port 1 Note On 1 C1 53
15:50:09.764 From Port 1 Note Off 1 C#2 0
15:50:09.764 From Port 1 Note On 1 C#1 91
15:50:09.764 From Port 1 Note Off 1 D2 0
15:50:09.764 From Port 1 Note On 1 D1 96
15:50:09.764 From Port 1 Note Off 1 D#2 0
15:50:09.764 From Port 1 Note On 1 D#1 61
15:50:09.764 From Port 1 Note Off 1 E2 0
15:50:09.764 From Port 1 Note On 1 E1 28
15:50:09.764 From Port 1 Note Off 1 A3 0
15:50:09.764 From Port 1 Note On 1 A2 58
15:50:09.764 From Port 1 Note Off 1 A#3 0
15:50:09.764 From Port 1 Note On 1 A#2 127
15:50:09.764 From Port 1 Note Off 1 B3 0
15:50:09.764 From Port 1 Note On 1 B2 127
15:50:09.765 From Port 1 Note Off 1 C4 0
15:50:09.765 From Port 1 Note On 1 C3 80
15:50:09.780 From Port 1 Note Off 1 A2 0
15:50:09.780 From Port 1 Note Off 1 A#2 0
15:50:09.782 From Port 1 Note Off 1 B2 0
15:50:09.782 From Port 1 Note Off 1 C3 0
15:50:09.782 From Port 1 Note Off 1 C1 0
15:50:09.782 From Port 1 Note Off 1 C#1 0
15:50:09.783 From Port 1 Note Off 1 D1 0
15:50:09.783 From Port 1 Note Off 1 D#1 0
15:50:09.783 From Port 1 Note Off 1 E1 0

All I want to be able to do is to get a "Note On" and a "Note Off" on a particular note # and channel that I can set. Ideally I can use the incoming velocity info to use the cool curves in the Qunexus editor and make my sound in Ableton to be as expressive as possible.

So far I am unable to even get simple changes in the editor like channel and CC# to read out differently in my Midi Monitor AP or in Ableton. I am only a few hours into working with this instrument, so I apologize in advance for 1) being a noob, and 2) asking about this if it has been covered somewhere else. Iv'e bee searching Youtube, Google, and this forum for these kinds of questions and I have surprisingly not seen anything posted about it. I've talked to a few drummer/producers about my little experiment and my friends are excited to see if I can get this working. There is interest in using the QuNexus with things like kick drum pedals, other electronic drum 'pads' and acoustic drum triggers. My thought was that the QuNexus was a pretty cheap 2 CV Input device that also happened to have a bunch of cool buttons and lights, rather than the other way around.

Anyways, please let me know if there is any valuable info on this kind of thing anywhere ot let me know if I'm doing something impossible. I just ordered a 1/8" y adapter to see if I can get any other kind of CC data through the QuNexus from my KD-7. http://www.amazon.com/dp/B00D6NPH88/ref ... 1_ST1_dp_1

Thanks for reading this far and I hope to get some guidance.

-Barong
TheSupport@KMI
Posts: 726
Joined: Wed Jul 13, 2011 12:30 pm

Re: CV In for drummers?

Postby TheSupport@KMI » Wed Oct 16, 2013 4:18 pm

Well first off, the CV inputs will show up as CC messages. If you want notes you'll need some software to convert the CCs to notes.

What sort of cable connections are you using? Do the KD-7 and FD-7 have TS (mono) or TRS (stereo) jacks/plugs? Is the 1/4" to 1/8" adapter you're using mono or stereo?

The CV input jack on QuNexus is actually a weird (I guess less weird these days, but they're still uncommon) TRRS connector (tip, ring, ring, sleeve) in order to get two separate CV ins on a single cable. And it matters what signal is on what part of the cable. The QuNexus CV manual has a diagram showing how everything needs to be wired up.

Tip = CV 1
1st Ring = +5V (for expression pedals)
2nd Ring = CV 2
Sleeve = Ground

And do you know what voltage range these pedals operate on? QuNexus works from 0-5V and won't like anything outside that range. That could be what is causing all of those weird MIDI messages — we've seen some really weird things happen when sending out-of-range voltage into QuNexus.

Nothing should be coming in on Port 1 at all (that's data directly from the QuNexus keyboard) — Port 3 is where the CV stuff comes in. In the MIDI stream you posted it seems the stuff on Port 3 is somewhat correct — by default CV 1 input would show up as CC 112 (we just randomly chose CC 112 and 113 for the default CV input CCs). But again, the stuff on Port 1 could be from incorrect voltage ranges.

Personally I always feel a little weird plugging accessories, but you might want to check out our CV Cable Kit: http://store.keithmcmillen.com/QuNexus- ... e-Kit.html It includes a few cables for CV input that will guarantee everything is wired correctly (you can check out all the cables in the CV manual). I can't tell if that Y cable you linked to is wired up properly for QuNexus CV — tip and sleeve are pretty universal, but the two rings could be flipped.
2, 3, 5, 13, 89, 233, 1597, 28657, 514229, 433494437, 2971215073

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