[PD] Morse Code Translator / Decoder

[Derek Kwan]

That looks awesome! Like megrimm said, I like the physical visualization
of the code with the water and air pulses.

Apologies in advance for going more tangential, but I've been intrigued
by the interplay and interconnections between telecommunications
technologies and art, although my technical knowledge of the former is a
bit thin... And esp as a percussionist, I could see morse code
transcription as a basis for an interesting audio/visual performative
piece. I've def got to look into it more, the most I've done with morse
is do fake morse code by playing random sequences of beeps on a bunch of
networked phones...

This e-mail thread has been inspiring, thanks pd-list! Back to regular
pd-list programming...

Derek

On Jun 16, Jack wrote:
> It is a little bit [OT], but here is an installation I co-produced with
> Cécile Babiole. It is a chat between two people based on a network
> working with water (coding en decoding (extended) Morse) :
> http://babiole.net/spip.php?article101
> It is now exhibited in Espace Gantner in Bourogne (East in France) :
> http://www.espacemultimediagantner.cg90.net/exposition/anarchronisme-machines-a-perturber-le-temps/
> ++
> 
> Jack
> 
> 
> 
> Le 15/06/2016 20:03, patrice colet a écrit :
> > 
> > 
> > Le 15/06/2016 à 19:57, Joel Matthys a écrit :
> >> Is [list-compare] from an external library? It's not in vanilla.
> >>
> > I forgot to put this in a subpatch, sorry for that, it's in [list-abs]
> > 
> > 
> >> Joel
> >>
> >> On 06/15/2016 12:25 PM, patrice colet wrote:
> >>>
> >>> Hello,
> >>>
> >>>  I've made such patch to decode termites hammering into morse.
> >>>
> >>>  It uses the process described by andy, and datastructure for storing
> >>> characters, it could also now be done with [text]
> >>>
> >>> I've made a version where [env] testes if there is sound amplitude or
> >>> not,
> >>>
> >>> and compare with templates stored into datastructure.
> >>>
> >>>  Attached is that version that should work with mjlib/morse and
> >>> latest pd-vanilla.
> >>>
> >>> Best,
> >>>
> >>> patco
> >>>
> >>>
> >>> Le 15/06/2016 à 15:34, Andy Farnell a écrit :
> >>>> Yes did that once, but I lost it years ago (the 
> >>>> patch I mean)
> >>>>
> >>>> IIRC its not that hard.
> >>>>
> >>>> Use a [timer] and onset/tone detector,
> >>>> and an array that looks up the next state.
> >>>> You need a way to navigate a tree - a state machine
> >>>> with 26 terminal nodes (36 if you want numbers)
> >>>> and there are four symbols to transition states,
> >>>> dot, dah, short space and long gap (between letters)
> >>>>
> >>>> The array is a 4-tree collapsed into a "Turing tape"
> >>>> so you use the symbol to select the offset (jump) 
> >>>> to the next state (table index) based on the last
> >>>> symbol. A long gap always resets the index to 0. 
> >>>>
> >>>> cheers,
> >>>> andy
> >>>>

=====================
Derek Kwan
www.derekxkwan.com