[PD] Avian syrinx revisited

[James Baker]

Andy,

These are not published models (as far as I know), but Bill
Schottstaedt (author of snd) seems to have done quite a bit see ->

http://snd.cvs.sourceforge.net/snd/cvs-snd/

in particular

http://snd.cvs.sourceforge.net/snd/cvs-snd/animals.scm?revision=1.101&view=markup

frogs, insects, and plenty of birds.

James

On Thu, Feb 21, 2008 at 4:23 PM, Andy Farnell
<padawan12 at obiwannabe.co.uk> wrote:
> Avian syrinx revisited
>
>  Synthetic birds have been done quite a bit, by Tamara Smyth (pressure impedance),
>  Seppo Fagerlund (a three port waveguide) and Hans Mikelson ( a csound FM
>  version ) [BTW if anybody else has got published models I don't of please let
>  me know.]
>
>  http://ccrma.stanford.edu/~tamara/publications/
>  http://www.acoustics.hut.fi/research/avesound/pubs/akusem04.pdf
>  http://www.csounds.com/ezine/winter2000/realtime/
>
>  I first put a tutorial on the syrinx up on my site 2 years ago
>  after copying Hans FM/AM version from Csound to Pd and then messed
>  with waveguide models and adding different beaks and trachea with some
>  success.
>
>  http://www.obiwannabe.co.uk/tutorials/html/tutorial_birds.html
>
>  But the one thing kept evading me, squawking birds. Oscines are singing birds
>  with a highly developed syrinx, and those are the ones everybody studies and
>  tries to emulate. Turns out oscines are the easier ones to create. But "working
>  class birds", crows, pigeons, ducks and seagulls are a different problem.
>  I live by the sea and when they're not stealing my chips, seagulls fly by
>  my room taunting me saying "come on then.. make a seagull sound!", but I could
>  never work it out. Seagulls 1: Andy 0
>
>  Well I fixed that, I think.
>  Thanks to some papers by these chaps, Suthers, Fee and Fletcher
>  it was time to have another look at the syrinx.
>
>  http://www.indiana.edu/~songbird/pubs/publications_index.html
>  http://web.mit.edu/fee/Public/Publications/Fee_etal1998.pdf
>
>  Starting with Tamaras pressure analysis again I decided to start making each
>  bronchus separately as a  pulse source then feed an FM stage with
>  feedback. I guess this is the same as using FM with a complex modulator, but
>  the feedback gets a semi chaotic effect which is what Fletcher suggests is
>  behind the squawk of birds with bigger lungs and smaller syrinx.
>
>  Here's the results (with background to situate them - all
>  synthetic scenery as usual)
>
>  First the regular oscines in a forest (with some recent insects)
>  http://www.obiwannabe.co.uk/sounds/effect-rainforestbirds.mp3
>
>  Now two examples from the new model
>  The star of this one is the duck...
>  http://www.obiwannabe.co.uk/sounds/effect-riverbirds.mp3
>
>  And here's the seagulls (gotchya you feathered freaks!)
>  http://www.obiwannabe.co.uk/sounds/effect-seabirds.mp3
>
>  The same model can do both, so it's quite flexible. All (pure) Puredata The Pd
>  code is still a little messy to release but it will be on the site soon or in
>  the book maybe.
>
>  Andy
>
>  --
>  Use the source
>
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