interesting how he uses pin ball technology to run the machine in the video.
back when I seen the 1st machine Wintergatan had made , I was somewhat skeptical that it wood! yes is made of bits of wood and wire

that it is going to be a nightmare just keeping it in tune, nevermind stopping it falling apart on tour. but I stand corrected

Wintergatan has re-made his pin ball

machine to be somewhat more robust.
so very Edward Scissorhands

like to know how to get that laser cut metal parts made to order. that is what I need.
I do note, how the standard configuration of the Wintergatan electric guitar body neck and head limit or make more complicated
the actuator design. the musical instrument is a compromise between two competing ideas ,
I will just add a bit about testing my automatic electric guitar drive transducer.
if anyone is interested in my design.
I spent the day researching this stuff so I might as well post all the text on this here!testing a DIY input drive transducer on any electric guitar
without damaging or dismantling the musical instrument,
for a proof of concept, will it work? how much input power do you need?
how much magnetic flux bleed over is there to the guitar pickup coils?
vs magnetic flux from the guitar string.
reducing direct inductive coupling in-between the input drive transducer we may be adding for testing.
and the guitar own pickup coils, for the it be successful the guitar string signal must be higher then the drive transducer.
at the guitar pickup coils, as its the guitar string signal output we are seeking here , not the input drive.
so its input drive to guitar string then guitar string back to guitar pickup coils.
the goal here is to use the timbre of the guitar string to add an all new sound to the existing electric guitar
so any direct inductive coupling in-between the input drive transducer and the guitar pickup coils is to be avoided.
try testing with a magnet added to the input drive transducer. or try using a high impedance drive coil.
what I was seeking was a magnetic grabbing hand that would instantly pulse or pluck the guitar string then instantly let go!
so the guitar string is free to resonate. to emulate a violin or hurdy gurdy a tone maybe sent the input drive transducer.
this would emulate a violin bow or hurdy gurdy wheel on the guitar string. use a music synthesizer make the best wave form
for the input.
one thing to consider with an automatic or self playing electric guitar design, is the string spacing is not limited by human fingers,
string spacing can now accommodate the drive transducers and the finger & fret shuttles.
so same type of slide bar or rod can be between the strings.
even allowing for a toothed belt to move the finger fret shuttles.
one example of mounting a shuttle on twin rods is inside CD / DVD players.
DIY electric steel guitar is a good place to start, as the same wooden base construction
would be used in any automatic or self playing electric guitar.
however a lot more space under the guitar strings is needed to accommodate the fret shuttles, one every channel or string.
if play flexibility is your end goal. as fixed position finger hammers make the musical instrument play stiff and mechanical.
see how this poor sounding musical instrument is so complex. lots of moving parts. in the Guitar-robot gv7 video.
as the guitar design is just an adapter that sits on a standard guitar made for human hands.
IMO let the driving software do as much of the complex stuff as possible.
and let the hardware be as simple, flexible and reliable as possible.
Guitar-robot gv7 this set up is using hard mechanical plucking that lacks the softness & flexibility
of any inductive coupling that we are seeking .
that's it