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 Forum index » Clavia Nord Modular » G2 Patches - Completed » Sequencer - interactive
Polyphonic MIDI Recorder/Looper
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Tim Kleinert



Joined: Mar 12, 2004
Posts: 1027
Location: Zürich, Switzerland
Audio files: 6
G2 patch files: 212

PostPosted: Tue Jun 01, 2010 4:26 pm    Post subject: Polyphonic MIDI Recorder/Looper
Subject description: with 60 seconds recording time
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Hi,

I always wanted to have a looper for the G2. But since the audio delay lines are to short for a reasonable loop length and I would be looping keyboard performance anyway, I thought it maybe would be possible to design a looper/recorder for MIDI data. Which is what this patch does.

It's based on a new patching technique which transforms an audio delay line into virtual RAM memory, where values can be written into or read from.

The patch is intended to drive other G2 slots or external MIDI gear. It is capable of recording exactly 60 seconds of MIDI performance. The control circuit is in the FX area and each voice acts as a "voice recorder", so the polyphony count determines how many voices you can actually play and record. I kept everything as simple as possible, so a "recorder voice" is below 16.6%. I added stuff to make the patch able to deal with voice-stealing. Velocity is recorded too, but not modwheel and other performance controllers.This can be added in future versions.

The controls:
RECORD Arm: "Arms" the recorder, makes it ready for recording. You now can play on the keyboard and the notes will be put through to the destination playback device (eg. patch in another slot). The patch now waits until you press...
RECORD Start: Starts the recording process. From now on everything you play will be recorded. (If you override the 60 seconds limit, the patch will simply shut off and you will have to start anew.)
RECORD Stop: Stops the recording. The circuit shuts off back into playback mode, playing back your performance. (Playing further notes on the keyboard has no effect anymore.) You can now jam over it with something else (a patch in another slot, whatever...)
MIDI CONTROL Channel: destination MIDI channel

Exclamation This patch uses 2 interslot busses.

Due to the design of the patch, the keyboard status is updated 40 times a second, which means that the playing response isn't super-crisp. It's OK though.

This is the first patch using this new technique and deliberately has no bells and whistles to keep things as economical as possible. (It could be economised even more by leaving out the recording of keyboard velocity data, but I considered that to be a bit too unmusical.) So it's an one trick pony, but a trick you've never seen from your G2. Smile

It is perfectly possible to add MIDI clock-synchronised looping, multi-channel realtime MIDI controller recording/automation and other elaborations, making it a full-featured MIDI-looper. I will try to add this in the future as time permits.

cheers & have fun
tim


60sMIDILooper_TK.pch2
 Description:
Polyphonic MIDI recorder/looper with 60 seconds of recording time

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 Filename:  60sMIDILooper_TK.pch2
 Filesize:  2.69 KB
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dasz



Joined: Oct 16, 2004
Posts: 1640
Location: vancouver, canada
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PostPosted: Tue Jun 01, 2010 5:11 pm    Post subject: Reply with quote  Mark this post and the followings unread

a big thank you, Tim! I tip my hat to you, sir.
/Dasz

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Roland Kuit



Joined: Sep 29, 2003
Posts: 1091
Location: The Netherlands/Sweden
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PostPosted: Wed Jun 02, 2010 9:44 am    Post subject: Reply with quote  Mark this post and the followings unread

ofcoarse!Smile a genius idea after your audio sampling techniques. thanks!!!!!!
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dorremifasol



Joined: Sep 28, 2006
Posts: 775
Location: Barcelona, Spain
Audio files: 7
G2 patch files: 47

PostPosted: Thu Jun 03, 2010 5:34 am    Post subject: Reply with quote  Mark this post and the followings unread

I've not tried it yet but with the description I'm already excited Shocked

I'll try it tonight, thanks!!

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Moody33



Joined: Apr 28, 2009
Posts: 88
Location: France
G2 patch files: 15

PostPosted: Thu Jun 10, 2010 9:07 am    Post subject: Reply with quote  Mark this post and the followings unread

I've made a sync midi looper a long time ago. It gives me 2 more voices than yours (24 versus 22 on my unexpanded G2) . It is sync to clock, so you can speed up and down what you have record. Still need improvements cause it give voice stealing and need more controls. I haven't got the time to work on it, but you can also loop red signals with. I hope it will give you some ideas for crazy patches !


SyncMidiLooper.pch2
 Description:
really basic midi sync looper.

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 Filename:  SyncMidiLooper.pch2
 Filesize:  1.21 KB
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Electromagnetic Wave



Joined: Apr 28, 2013
Posts: 81
Location: Kebek
G2 patch files: 12

PostPosted: Tue Aug 06, 2013 12:14 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
It is perfectly possible to add MIDI clock-synchronised looping, multi-channel realtime MIDI controller recording/automation



I cannot figure how to add MIDI clock-synchronised looping on this patch. Can you help me please?

Edit : The patch from Moody33 is very small (cycles 3.4 / Memory 16.4) and easy to use. But yes, need some improvement to fix voice stealing issue.

Because I like to use my G2 without external sequencer these 2 patchs into this topic are very usefull for me.
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