Monday, April 27, 2015

Vladimir Demin Robotic Guitar

05/25/12 — We already know that musically inclined robots will take up the Beatles mantle in the future, and that they are skilled at reproducing the classic James Bond theme. But just to further show how obsolete human musicians are, Vladimir Demin (MrDeminva on YouTube) built a robotic guitar that can replace a group of guitarists. Normally it takes a group of musicians to play this particular Russian tune. Demin’s actuated player guitar can reproduce the song by itself with such unrelenting tempo and perfect accuracy. The robotic guitar can do this because each fret on the instrument has its own dedicated…

Automation and Robotics News

The robotic guitar can do this because each fret on the instrument has its own dedicated solenoids to magnetically strum the individual strings. The guitar-strumming mechanism is equipped with six picks (one for each string) that allows it to play note after note at an incredibly inhuman speed.
Watching this guitar play is an incredible sight, but there’s still something soulless-sounding about it -- you know, besides the obvious point that a human is not playing it.


If you compare its rendition (video above) of “Go Down Moses” to Siggi Mertens’, it sounds incredibly hollow. This might have to do something with the fact that the entire guitar is strapped down, which prevents the sound box from vibrating properly, or it might just be the way it does not hold a note for more than a few milliseconds.

Hack a Day

[Vladimir Demin] is somewhat of a legend for us; in his spare time he’s been mastering the automation of musical instruments. This time he’s back with upgrades to his build and four new videos. [Vladimir’s] top priority was to rework the strumming mechanism that earlier ran on solenoids. He’s improved the sound quality and reduced the clicks by swapped to stepper motors and overhauling the software.
Compared to his earlier setup, this one sounds more soulful and less automated, but [Vladimir] admits that it’s still not good enough and that he’s working on a new, brilliant implementation. Until then, take a few minutes and check out the rest of the videos below, then join us in scratching our heads in amazement: everything is built with simple hand tools.
[Vladimir] has come a long way, and it started with this Bayan (button accordion). Last year’s guitar build is also worth a look, as well as an in-depth interview.

Hack a Day

This guitar-robot (in my opinion) includes 4 or 5  know-how.
The main Know-How is the interface that I had developed in 1988 for real (not digital)
instrument. I did not know Midi in 1988.Now I say-Midi totally inappropriate for real music device(like my robot).
Also my interface allows  very easily, accurately, quickly enter notes of melody without error.
Guitar  is controlled by  digital part of the   handset designed earlier for radio  trunking system.
The handset was designed by me.
It(handset) manages the memory of solenoids, which are mounted on the guitar.
It includes  microCPU ADSP2187,  flash memory, DAC and ADC.
You can listen the future melody for the guitar from small speaker inside the handset
without guitar.Very usefull.
The device  for strum  strings has four phases of operation time.( management by software)
-switch on a solenoid-string tension(same delay)
-switch on a solenoid strum(same delay)
-switch off solenoid-string tension(same delay)
-switch off solenoid strum(don’t care delay)
for a short time, not more than 7 msec ,current guitar power supply can consume up to 30 amperes at a voltage of 12 volts.
Despite the high current(because short time), battery capacity of 5 amp/ hour rather continuous play 2-4 hours.
It depends on the type of music.
Vladimir Demin

Hack a Day