[sdiy] Using analog for physical modeling

[David Ingebretsen]

Thanks Scott.

David

David M. Ingebretsen, M.S., M.E.
Collision Forensics & Engineering, Inc.

Office: 801 733 5458
Cell: 801 842 5451

www.CFandE.com
dingebre at CFandE.com
dingebre at 3dphysics.net




>>> -----Original Message-----
>>> From: synth-diy-bounces at dropmix.xs4all.nl [mailto:synth-diy-
>>> bounces at dropmix.xs4all.nl] On Behalf Of Scott Gravenhorst
>>> Sent: Sunday, September 18, 2011 3:55 PM
>>> To: synth-diy at dropmix.xs4all.nl
>>> Subject: Re: [sdiy] Using analog for physical modeling
>>> 
>>> Here it is:
>>> 
>>> http://www.electro-music.com/forum/topic-36165.html&postorder=asc
>>> 
>>> 
>>> 
>>> "David Ingebretsen" <dingebre at 3dphysics.net> wrote:
>>> >OK,
>>> >
>>> >This one? It has schematics, talks about a MN3207 BBD, etc.
>>> >
>>> >http://www.electro-
>>> music.com/forum/viewtopic.php?highlight=karplus+bbd&t=419
>>> >76
>>> >
>>> >
>>> >David
>>> >
>>> >>>> -----Original Message-----
>>> >>>> From: synth-diy-bounces at dropmix.xs4all.nl [mailto:synth-diy-
>>> >>>> bounces at dropmix.xs4all.nl] On Behalf Of Scott Gravenhorst
>>> >>>> Sent: Sunday, September 18, 2011 2:10 PM
>>> >>>> To: synth-diy at dropmix.xs4all.nl
>>> >>>> Subject: Re: [sdiy] Using analog for physical modeling
>>> >>>>
>>> >>>> "David Ingebretsen" <dingebre at 3dphysics.net> wrote:
>>> >>>> >
>>> >>>> >
>>> >>>> >>>> -----Original Message-----
>>> >>>> >>>> From: synth-diy-bounces at dropmix.xs4all.nl [mailto:synth-diy-
>>> >>>> >>>> bounces at dropmix.xs4all.nl] On Behalf Of Scott Gravenhorst
>>> >>>> >>>> Sent: Sunday, September 18, 2011 1:41 PM
>>> >>>> >>>> To: synth-diy at dropmix.xs4all.nl
>>> >>>> >>>> Subject: Re: [sdiy] Using analog for physical modeling
>>> >>>> >>>>
>>> >>>> >>>> A friend (Les Hall aka Inventor) on the electro-music.com
forum
>>> >came up
>>> >>>> >with
>>> >>>> >>>> something I thought was interesting.  He re-modeled a
>>> >Karplus-Strong
>>> >>>> >string
>>> >>>> >>>> model
>>> >>>> >>>> using analog components (assuming you consider a BBD an analog
>>> >device).
>>> >>>> >>>>
>>> >>>> >>>> His loop was constructed with a BBD (length, I don't know), a
>>> >linear
>>> >>>> >>>> attenuator
>>> >>>> >>>> (pot) and a tunable single pole lowpass filter (one LM13700).
He
>>> >drove
>>> >>>> >the
>>> >>>> >>>> BBD
>>> >>>> >>>> clock with a VCO to allow tuning the delay line.  I wish I
could
>>> >find
>>> >>>> >the
>>> >>>> >>>> post on
>>> >>>> >>>> e-m, but my fu isn't so fu.
>>> >>>> >>>>
>>> >>>> >>>> -- ScottG
>>> >>>> >
>>> >>>> >Is this the thread?
>>> >>>> >
>>> >>>> >http://electro-
>>> >>>> music.com/forum/viewtopic.php?highlight=model+karplus&t=40927
>>> >>>>
>>> >>>> No, that one uses ChucK which is a computer language and sound
>>> >generation
>>> >>>> system and is
>>> >>>> wholly digital.
>>> >>>>
>>> >>>> There was/is a thread about "The Brick" which is his BBD
Karplus-Strong
>>> >>>> design with a
>>> >>>> sequencer added.  There isn't any good detail there about the K-S
loop.
>>> >>>>
>>> >>>> There is a thread somewhere there that describes in detail
(including
>>> >>>> schematics I
>>> >>>> believe) just the Karplus-Strong loop, but I can't seem to locate
it.
>>> >>>>
>>> >>>>
>>> >>>>
>>> >>>> >
>>> >>>> >David M. Ingebretsen, M.S., M.E.
>>> >>>> >Collision Forensics & Engineering, Inc.
>>> >>>> >
>>> >>>> >Office: 801 733 5458
>>> >>>> >Cell: 801 842 5451
>>> >>>> >
>>> >>>> >www.CFandE.com
>>> >>>> >dingebre at CFandE.com
>>> >>>> >dingebre at 3dphysics.net
>>> >>>> >
>>> >>>> >
>>> >>>> >
>>> >>>> >
>>> >>>> >_______________________________________________
>>> >>>> >Synth-diy mailing list
>>> >>>> >Synth-diy at dropmix.xs4all.nl
>>> >>>> >http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>> >>>> >
>>> >>>>
>>> >>>> -- ScottG
>>> >>>>
>>> ________________________________________________________________________
>>> >>>> -- Scott Gravenhorst
>>> >>>> -- FPGA MIDI Synthesizer Information:
>>> >>>>    jovianpyx.dyndns.org:8080/public/FPGA_synth/
>>> >>>> -- FatMan:
>>> >>>>    jovianpyx.dyndns.org:8080/public/fatman/
>>> >>>> -- NonFatMan:
>>> >>>>    jovianpyx.dyndns.org:8080/public/electronics/
>>> >>>> -- When the going gets tough, the tough use the command line.
>>> >>>>
>>> >>>> _______________________________________________
>>> >>>> Synth-diy mailing list
>>> >>>> Synth-diy at dropmix.xs4all.nl
>>> >>>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>> >
>>> >_______________________________________________
>>> >Synth-diy mailing list
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>>> >http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>> >
>>> 
>>> -- ScottG
>>> ________________________________________________________________________
>>> -- Scott Gravenhorst
>>> -- FPGA MIDI Synthesizer Information:
>>>    jovianpyx.dyndns.org:8080/public/FPGA_synth/
>>> -- FatMan:
>>>    jovianpyx.dyndns.org:8080/public/fatman/
>>> -- NonFatMan:
>>>    jovianpyx.dyndns.org:8080/public/electronics/
>>> -- When the going gets tough, the tough use the command line.
>>> 
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>>> Synth-diy mailing list
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