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 Forum index » Clavia Nord Modular » Nord Modular G2 Discussion
Random generated music tips please
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sheridan



Joined: Jun 05, 2005
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PostPosted: Sat Jun 17, 2006 7:01 pm    Post subject: Random generated music tips please Reply with quote  Mark this post and the followings unread

Hi there.

I've just completed my first performance using randomly generated notes (attached here: http://electro-music.com/forum/post-80748.html#80748). I think it's fairly good, but there is something bothering me... In the performance, Slot B (pad sound), sometimes two consequecutive notes are the same, ie. two consecutive random values are close enough to be quantised to the same note. How can I avoid this? Anyone know?

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transformer Sheridan

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ian-s



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PostPosted: Sat Jun 17, 2006 7:52 pm    Post subject: Reply with quote  Mark this post and the followings unread

I’ve pondered that question once or twice. This is one solution I thought of.
The green block gives a logic high only when both levels are the same. This logic signal offsets one of the levels to whatever interval you want in place of unison.


NotEq.pch2
 Description:
avoid identical notes in random sets

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 Filename:  NotEq.pch2
 Filesize:  3.67 KB
 Downloaded:  1294 Time(s)

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sheridan



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PostPosted: Sun Jun 18, 2006 7:31 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks Ian.

I've looked at your patch and I think it's a way of ensuring notes in a chord are not the same. That's good, but I was actually after a way to ensure that two consecutive (mono) notes are not the same. I was thinking of using a sample and hold module with a delay and something silmilar to your compare circuit, but I couldn't work out how to patch it up. I'll have another look to see if I can modify your patch to do it. In the meantime, if anyone has already worked this out, I'd appreciate a fix patch.


<<Edited>> Just had a go... it didn't really work, but I've found another problem with my idea. To delay the signal to the S&H module, I need to use an audio delay which then upgrades the signal to audio level which makes it a bit DSP hungry. Any ideas anyone? I don't suppose there is a module that will take a reading of an input on receiving a clock pulse and output it at the next clock pulse is there?

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transformer Sheridan

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Blue Hell
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PostPosted: Sun Jun 18, 2006 8:13 am    Post subject: Reply with quote  Mark this post and the followings unread

sheridan wrote:
I don't suppose there is a module that will take a reading of an input on receiving a clock pulse and output it at the next clock pulse is there?


No, but when you cascade two s&h's and trigger one with a logic signal and another one with an inverted version of that signal you'd have something like it. Or maybe the SR32 / DlyClock module when set to two ... (from the delay tab)

BTW, to delay a logic signal you can use a logic delay module (from the yellow tab)

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also .. could someone please turn down the thermostat a bit.
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sheridan



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PostPosted: Sun Jun 18, 2006 8:24 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks Jan,

I'll try the cascading S&H modules idea.

Blue Hell wrote:
BTW, to delay a logic signal you can use a logic delay module (from the yellow tab)


Yeah, but to delay a control signal (note number), you need to use an audio delay don't you?

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transformer Sheridan

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ian-s



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PostPosted: Sun Jun 18, 2006 1:25 pm    Post subject: Reply with quote  Mark this post and the followings unread

My idea doesn't work for serial note streams because if you get 3 consecutive identical notes, the second two will still be the same. Also, the interval you modify the note by could statistically be the next random value. see attached patch.

An alternative would be just to use 2 KeyQuant modules with mutually exclusive note selections and toggle between them on consecutive notes.

see second attachment.


serialNotWork.pch2
 Description:
does not work :(

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 Filename:  serialNotWork.pch2
 Filesize:  1.11 KB
 Downloaded:  1225 Time(s)


serialNotSame.pch2
 Description:
no two consecutive notes the same

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 Filename:  serialNotSame.pch2
 Filesize:  1.36 KB
 Downloaded:  1387 Time(s)

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sheridan



Joined: Jun 05, 2005
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PostPosted: Sun Jun 18, 2006 1:40 pm    Post subject: Reply with quote  Mark this post and the followings unread

g2ian wrote:
if you get 3 consecutive identical notes, the second two will still be the same. Also, the interval you modify the note by could statistically be the next random value.


I found that... got stuck there. Thanks for your excellent (and simple) solution. Since I found out Metamorphosis.prf won't work on unexpanded, I've gone back and added some more bits and pieces - I'll have to see if I can include this... I think I've only got about 1% spare in the relevant slot, but I'll see if I can squeeze it in. Very Happy

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transformer Sheridan

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