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 Forum index » DIY Hardware and Software » Developers' Corner
New project: uPendage
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Grumble



Joined: Nov 23, 2015
Posts: 956
Location: Netherlands
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PostPosted: Sun Dec 16, 2018 4:54 am    Post subject: New project: uPendage
Subject description: Appendage uprocessor style
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I know, there are some more projects in the pipeline, but I have shelved them for a while to have time to build this project.
It is something I wanted for a long time but never got to it, but after reading an explanation about the main part of this build I decided to build my own in my own way...
The center part is an AtxMega32E5 running at 32MHz and two 16bit ADC’s ADS8320 and an Analog Devices 4 channel 16bit DAC the AD5754 controlled with SPI bus at a 2MHz clockfrequency.
More to come... too much coffee


_20181216_121815.JPG
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The board so far
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_20181216_121815.JPG



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Last edited by Grumble on Fri Jan 04, 2019 4:39 am; edited 1 time in total
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Grumble



Joined: Nov 23, 2015
Posts: 956
Location: Netherlands
Audio files: 27

PostPosted: Fri Dec 21, 2018 1:42 am    Post subject: Reply with quote  Mark this post and the followings unread

After seeing the threads about the appendage, designed by Scott Stites, I had to have one for myself badly enough to put all other projects on the shelf.
Especially when I read his Appendage Exposed document, got me on the move and proved to be invaluable for the design.
It needs some more serious programming but here is the first test:
https://youtu.be/D2mneJRPE5k

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ixtern



Joined: Jun 25, 2018
Posts: 76
Location: Poland

PostPosted: Fri Dec 21, 2018 3:30 am    Post subject: Reply with quote  Mark this post and the followings unread

Grumble wrote:
After seeing the threads about the appendage, designed by Scott Stites, I had to have one for myself badly enough to put all other projects on the shelf.
Especially when I read his Appendage Exposed document, got me on the move and proved to be invaluable for the design.
It needs some more serious programming but here is the first test:
https://youtu.be/D2mneJRPE5k

Indeed, seeing Scott's videos ribbon controller seems to be good at making weird sounds. I am not the fan of the gliding sounds (Theremin-like) but it is up to preferences. With a XMega you can also easily implement tempered scale playing on ribbon (by simple voltage lookup table).
For me the best use of ribbon is to control not directly VCO frequency but other sound parameters like VCF frequency (or resonance), phase shift, reverberation time, modulation depth etc.
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ixtern



Joined: Jun 25, 2018
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PostPosted: Fri Dec 21, 2018 3:31 am    Post subject: Reply with quote  Mark this post and the followings unread

Obsolete post...
Last edited by ixtern on Fri Dec 21, 2018 6:24 am; edited 2 times in total
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Grumble



Joined: Nov 23, 2015
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Location: Netherlands
Audio files: 27

PostPosted: Fri Dec 21, 2018 3:48 am    Post subject: Reply with quote  Mark this post and the followings unread

In this video I use the initial voltage for setting the frequency of the vco, and the slide voltage for the vcf.
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Blue Hell
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Joined: Apr 03, 2004
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PostPosted: Fri Dec 21, 2018 6:16 am    Post subject: Reply with quote  Mark this post and the followings unread

Oh nice, a simpler - well, with the complexity better hidden let's say - Pendage :-)
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Grumble



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PostPosted: Sat Dec 22, 2018 3:38 am    Post subject: Reply with quote  Mark this post and the followings unread

Now I have 4 working analog voltages and 2 digital ones so far:
Initial, Slide, Bend and TFS plus a GATE and a TRIGGER too much coffee

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Grumble



Joined: Nov 23, 2015
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PostPosted: Fri Jan 04, 2019 3:03 am    Post subject: Reply with quote  Mark this post and the followings unread

I have added midi to the uPendage
notes to the initial voltage, pitch bend to the bend voltage and mod wheel to the tfs voltage
https://youtu.be/WrWBbR084Dg

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PHOBoS



Joined: Jan 14, 2010
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PostPosted: Fri Jan 04, 2019 8:05 am    Post subject: Reply with quote  Mark this post and the followings unread

sounds like it is working very well Very Happy
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