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Aleatoric Harmonic Drone
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JovianPyx



Joined: Nov 20, 2007
Posts: 1221
Location: West Red Spot, Jupiter
Audio files: 157

PostPosted: Wed Feb 15, 2012 8:50 am    Post subject: Aleatoric Harmonic Drone Reply with quote  Mark this post and the followings unread

I wrote a piece of software months ago that generates aleatoric musical sequences. It had been able to transmit MIDI data format messages via a COM port. Recently, I replaced that mechanism with real MIDI.

I set the sequencer to change slowly, using a C minor blues scale. The piece contains two parts played into 4 FPGA synths. Each part drives a pair of synths. One Random Timbre Synth and one Sine Synth for each part. Generally, these synths produce randomly evolving sounds. Random Timbre Synth does so by generating random waveshapes and pan morphing to the next one on MIDI clock. Sine Synth does so by generating randomly changing levels of harmonics played by 32 sinewave oscillators.

It may sound like more than two parts because each synth has a looped delay (echo) effect. Sine Synth runs about 65 seconds while Random Timbre Synth is set to about 160 seconds. The echo layering causes some of the chord structure.

Here is about 20 minutes of what came out.


Aleatoric_Harmonic_Drone.mp3
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Aleatoric Harmonic Drone

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 Filename:  Aleatoric_Harmonic_Drone.mp3
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FPGA, dsPIC and Fatman Synth Stuff

Time flies like a banana.
Fruit flies when you're having fun.
BTW, Do these genes make my ass look fat?
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Last edited by JovianPyx on Wed Feb 15, 2012 2:12 pm; edited 2 times in total
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JovianPyx



Joined: Nov 20, 2007
Posts: 1221
Location: West Red Spot, Jupiter
Audio files: 157

PostPosted: Wed Feb 15, 2012 1:58 pm    Post subject: Reply with quote  Mark this post and the followings unread

My thanks to Blue Hell for his help in getting the MIDI software working.
_________________
FPGA, dsPIC and Fatman Synth Stuff

Time flies like a banana.
Fruit flies when you're having fun.
BTW, Do these genes make my ass look fat?
corruptio optimi pessima
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Blue Hell
Site Admin


Joined: Apr 03, 2004
Posts: 20480
Location: The Netherlands, Enschede
Audio files: 147
G2 patch files: 318

PostPosted: Wed Feb 15, 2012 2:07 pm    Post subject: Reply with quote  Mark this post and the followings unread

Fruit flies when you're having fun.

You're welcome Scott; the thing sounded nice yesterday when I listened live Smile

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Jan
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darkvortex
Radio Master


Joined: Aug 19, 2011
Posts: 182
Location: Canberra, Australia
Audio files: 50

PostPosted: Thu Feb 16, 2012 3:25 am    Post subject: Reply with quote  Mark this post and the followings unread

Loved it! Played it twice!!! Very Happy
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RingMad



Joined: Jan 15, 2011
Posts: 219
Location: Montreal, Canada
Audio files: 2

PostPosted: Tue May 15, 2012 4:15 am    Post subject: Reply with quote  Mark this post and the followings unread

I liked this a lot. This is the kind of thing that I could listen to for hours. Do you have one in D Smile?

James
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JovianPyx



Joined: Nov 20, 2007
Posts: 1221
Location: West Red Spot, Jupiter
Audio files: 157

PostPosted: Tue May 15, 2012 4:35 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi James,

Thanks! In D? heh, the program can use any scale in any key, even weird ones.

I did another aleatoric piece in a scale called "Pelog" here. Kind of haunting, it has structure, but no "resolve".

_________________
FPGA, dsPIC and Fatman Synth Stuff

Time flies like a banana.
Fruit flies when you're having fun.
BTW, Do these genes make my ass look fat?
corruptio optimi pessima
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