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 Forum index » Clavia Nord Modular » G2 Building Blocks
Voice selector
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ark



Joined: Mar 06, 2008
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PostPosted: Fri Dec 12, 2008 10:53 am    Post subject: Voice selector
Subject description: Building block for making polyphonic patches
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I recently realized that when you put a note sequencer in the VA section, you really get one note sequencer per voice -- and if it were possible to set each of those note sequencers to a different value, a single note sequencer could actually play chords.

I'm trying to build a patch to do that, but it's too complicated for me to do all at once. So I'm doing it in pieces. Here is the first piece.

It's a patch that allows you to use a knob to select a voice by number and generates a logic level that does something in that voice only. To see it at work:

1) Load this patch.
2) Play a chord with four notes.
3) Turn knob A1 and listen to the output step through the four notes of the chord.

If you don't like the number 4, change the number of voices as you like.

I suspect that this patch does not work with more than 16 voices, and would appreciate it if someone could help me figure out how the 2's complementation notation conventions work in these patches.


Voice selector.pch2
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iPassenger



Joined: Jan 27, 2007
Posts: 1051
Location: Sheffield, UK
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PostPosted: Mon Dec 15, 2008 7:18 am    Post subject: Reply with quote  Mark this post and the followings unread

Love the idea. I think.. Do you mean that each voice has its own pattern? And that by somehow switching between the voices you could see/edit the different patterns?

Sounds like it might be difficult to work with...

Do the sequencers not just work monophonically regardless of where they are put?

Stuck at work so can't look at the patch just yet.

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Blue Hell
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PostPosted: Mon Dec 15, 2008 8:08 am    Post subject: Reply with quote  Mark this post and the followings unread

iPassenger wrote:
Do the sequencers not just work monophonically regardless of where they are put?


For most sequencers there is no way to tell really as there is no way to set up a pattern for a different voice. The exception being the Note sequencer, as it has a recording interface there is a way to treat it different over the voices, and indeed it can have a distinct pattern for each voice that way. I think these patterns will not be stored though when the patch is saved, as the only voice private data I know of that is stored is some info about the last notes that were played.

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Blue Hell
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PostPosted: Mon Dec 15, 2008 8:09 am    Post subject: Reply with quote  Mark this post and the followings unread

Blue Hell wrote:
as there is no way to set up a pattern for a different voice.


thinking .. maybe there is by using MIDI modules, I didn't test that.

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PostPosted: Mon Dec 15, 2008 10:25 am    Post subject: Reply with quote  Mark this post and the followings unread

Sweet patching indeed. Smile But I'm not clever enough to make it do what you want.. Mr Hell?
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Blue Hell
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PostPosted: Mon Dec 15, 2008 10:46 am    Post subject: Re: Voice selector
Subject description: Building block for making polyphonic patches
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ark wrote:
I suspect that this patch does not work with more than 16 voices, and would appreciate it if someone could help me figure out how the 2's complementation notation conventions work in these patches.


It looks like you are using the AD/DA to divide by four, and then you run out of representation space - is it not possible to use a mixer instead set to 25% ?

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ark



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PostPosted: Mon Dec 15, 2008 11:39 am    Post subject: Re: Voice selector
Subject description: Building block for making polyphonic patches
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Blue Hell wrote:

It looks like you are using the AD/DA to divide by four, and then you run out of representation space - is it not possible to use a mixer instead set to 25% ?

I wanted to divide by 4 and truncate.

But I don't see why I should run out of representation space as I potentially have +- 127 and only need half of the positive section of that range.
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Blue Hell
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PostPosted: Mon Dec 15, 2008 12:26 pm    Post subject: Re: Voice selector
Subject description: Building block for making polyphonic patches
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ark wrote:
But I don't see why I should run out of representation space as I potentially have +- 127 and only need half of the positive section of that range.


When you go above voice 15 the AD converter clips to 127, you could do a pre-subtract by level adding -64 to the voice no. but then you'll have to deal with negative numbers. It's a bit hard to check without a keyboard, but it looks like D7 could be treated as a sign bit then and that it can be connected to D7 on the DA instead of to D5 to make it work.

Still, a mixer set to 25% seems to work OK with about 5% less memory usage.

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