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modular arm

online EpicMegatrax from Greatest Hits on 2021-08-18 09:03 [#02610880]
Points: 18477 Status: Lurker



online EpicMegatrax from Greatest Hits on 2021-08-18 19:40 [#02610911]
Points: 18477 Status: Lurker

the guy talks on a bit, but when he gets to the part about:
to just... think it... it's so hard to explain how it feels!
and he's giddy like a little kid. i just kind of smiled, and
thot: yeah, i know how hard that is to explain, too.

when i first built out my modular to the point where it was,
like, useful, i was sitting there, playing with it, utterly
focused. i got into some complex finger configuration and
closed my eyes in order to concentrate on the sound. my
hands utterly still except moving some knobs in between my
fingers. after a few minutes of this, it's like my hands had
ceased to exist, and i merely thought changes in the

then my boyfriend tapped me on the shoulder, and it all
popped like a bubble. dammit! kubla khan, have you heard of
it, dan? no? ppf

obviously i wanted this to happen again, and that's been a
long journey, building a weasel megazord with robot arms.
modular robot arms.

it happens to me all the time, now. my hand will get settled
into some comfortable nook and a few seconds later i don't
have a hand anymore, just some parameters i can control with
my mind. and, of course, arguably, i do still have a hand,
and it's controlling the knobs physically. but it's so hard
to explain how it feels


offline DADONCK from here on 2021-08-18 19:44 [#02610912]
Points: 3406 Status: Lurker



offline Hyperflake from Wirral (United Kingdom) on 2021-08-18 19:47 [#02610913]
Points: 30221 Status: Addict

Isn't it a bit extreme to cut off your own arm just for a
music project!


online EpicMegatrax from Greatest Hits on 2021-08-18 20:00 [#02610914]
Points: 18477 Status: Lurker | Followup to DADONCK: #02610912

heck, i was actually just coming back to ask: yeah, i could
play an 808 with muscle twitches, is there a thing? thanks.

follow-up: has someone already sorted out how to get this
into MIDI? you'd obviously need another arduino or
something; form a hub of sorts for multiple sensors and then
spit it out to a MIDI port. i cannot find anything on

really, though, single-use ekg sensors; PITA. do i need the
grainy jelly too? i actually explored this years ago as a
computer interface, trigger the shift key or something.
almost makes more sense for that, than for music

... 'cos, good as i'd be at multitrack twitching, i would
probably still need to practice in multiple sessions before
i can do it at the same time as running gear. and would be
through the whole pack of medical sticker things before i
really got going


offline DADONCK from here on 2021-08-18 20:07 [#02610915]
Points: 3406 Status: Lurker | Followup to EpicMegatrax: #02610914

i actually build some prosthetics myself with an ecg sensor
that i used as a myoelectric sensor, before you could get
sensors like this easily

you need an arduino, yes. i only used it as an interface for
the sensor to get the data into my computer. you could
program a midi controller on the arduino itself to have an
autarkic device. i programmed everything on the computer

i made a test were i played a snaredrum with my eye lid.
worked perfectly


offline DADONCK from here on 2021-08-18 20:08 [#02610916]
Points: 3406 Status: Lurker

that was 2008, should be much easier today


online EpicMegatrax from Greatest Hits on 2021-08-18 20:13 [#02610917]
Points: 18477 Status: Lurker

how do you get ecg wired to your eyelid?

i think i may get the dev kit. i don't have any hope for
this to be practical for studio usage -- having to buy bags
of sensor stickers, and heck! it's pretty bulky. even just
one on my arm could be too cumbersome to really be worth it

but i can think of some non-music uses for this.

musically, i suppose my ideal want would be being able to
send gate triggers using muscles in my toes and feet.
there's a lot, down there. articulation, zones. and they're
not doing much when i'm recording music

seeing how this works, though, i'm not sure you could do
that. everything's too close together and it would just be
like trying to listen to six radio stations at once


offline DADONCK from here on 2021-08-18 20:17 [#02610918]
Points: 3406 Status: Lurker | Followup to EpicMegatrax: #02610917

i put an electrode on the muscle under my eye


offline DADONCK from here on 2021-08-18 20:20 [#02610919]
Points: 3406 Status: Lurker

this video inspired me back then:


offline DADONCK from here on 2021-08-18 20:31 [#02610922]
Points: 3406 Status: Lurker

easy easy


online EpicMegatrax from Greatest Hits on 2021-08-18 20:57 [#02610929]
Points: 18477 Status: Lurker

i was more inspired by psych classes... rubber hand
illusion, phantom limb syndrome...

phantom limb syndrome, yeah. common for those with it to say
like it's permanently frozen in the last position it was
ever in, when it was still there, forever. for many it is
even quite painful. that's the polar opposite of...

...rubber hand illusion: LAZY_TITLE

they call it "proprioceptive drift," heh. that's almost my
word i need, or phrase. it's more like "proprioceptive
flexibility." or plasticity.

your mental map of your things, what you regard as part of
your body and what you don't, is flexible. probably simplest
way to get your foot in the door is guided meditation. you
walk through body, every little bit, in order, and feel it,
say hullo for a moment. if you can say still/focused enough,
very quickly, you'll start to feel illusions like your hand
is becoming gigantic (until you become the sensory
homunculus [then eventually a sphere])

so, i guess, i am temporarily accepting some arbitrary
cluster of knobs, or faders, or buttons as an extension of
my proprioceptive map. at the start, this was very fragile,
i had to really almost meditate on a position for a few
minutes. now, just kind of position whatever, fuss around a
little bit and get myself settled, and i'm there.

walking down the street in a busy city, i also started to
feel a weird thing. like there was a bubble of awareness
around me, of what i was allowing to reach my conscious
mind. i realized i could expand it or shink it: focus close
around, focus wide out. then i noticed, kind of startled me
really, that other people seemed to react. then i realized i
could focus it like a flashlight, and people would react for
more often. not always, mind you. but enough to be more than
sheer chance


online EpicMegatrax from Greatest Hits on 2021-08-18 21:14 [#02610930]
Points: 18477 Status: Lurker


i need to design a shoe that has gate outputs


online EpicMegatrax from Greatest Hits on 2021-08-18 21:27 [#02610932]
Points: 18477 Status: Lurker

i'm aware That 1 Guy has his magic boot, which is like, i
dunno, that has some stuff going on. but it's more just a
little foot shaker noisemaker and a sample trigger i think
with an expression pedal

i mean, i have a midi pedalboard. i should give that another
stab. it was just too big and clunky really. but it's not
even expression, i don't think, just oversize foot buttons.

that the tendons powering the left shift key were screaming
uncle but i have to keep working? so i took apart an old
ps/2 keyboard and turned it into a ps/2 left shift key with
a 1/4" in. but then a sustain pedal is too heavy. and i'm on
to researching, like, good foot buttons

no, none of that. not what i mean, here. like the car is a
very controlled acoustic environment because the
manufacturer has complete control over the space, a shoe
surrounds your foot. and you can't easily do this with your
arm. even, like, neoprene would slide about too much. and
since you have the whole foot, in a reasonably reliable
position, you can then use some AI tool to take the cloud of
noise from a dozen sensors pressing up against the foot and
gradually extract usable configurations. which may not even
be as specific as "wiggle toe"


online EpicMegatrax from Greatest Hits on 2021-08-18 21:30 [#02610933]
Points: 18477 Status: Lurker | Followup to EpicMegatrax: #02610932

take the cloud of noise from a dozen sensors pressing up
against the foot and gradually extract usable

that's essentially how the brain leans to control the body,
by the way. one of my favorite wild-but-plausibles is that
hiccups are a way to bootstrap voluntary control of
breathing. a sonar ping guide the wiring


online EpicMegatrax from Greatest Hits on 2021-08-18 21:41 [#02610936]
Points: 18477 Status: Lurker



online EpicMegatrax from Greatest Hits on 2021-08-19 01:11 [#02610965]
Points: 18477 Status: Lurker

hmm, or perhaps somewhat supervised learning. you dance to
some chopped, programmed amen break as the shoes (ecg,
accelerometers, pressure sensors) record data to your phone
via gruetoof. then you feed some neural network the data
from the shoe sensors, plus the MIDI file that generated the
sequence of chopped amen you were dancing to. an hour or
three of dancing later, you switch the model from "record"
to "play" and then have it guess at which sample to trigger
based on how you dance. and that this is far less cumbersome
than using stickers to hold a sparkfun stack to your arm for
a single CV output. more pleasing to the user, as tim cook
might say


offline DADONCK from here on 2021-08-19 01:57 [#02610966]
Points: 3406 Status: Lurker



online EpicMegatrax from Greatest Hits on 2021-08-19 06:25 [#02610970]
Points: 18477 Status: Lurker | Followup to DADONCK: #02610966



online EpicMegatrax from Greatest Hits on 2021-08-20 07:04 [#02610999]
Points: 18477 Status: Lurker

i dunno. i guess there's more of a basis to it. like
LAZY_TITLE sez ~ right brain, involved in learning new
activities. left brain, involving learned activities.

one nice inflection point is that learning activities can
become a learned activity. obviously needs to be good
coordination between both

my left brain runs the machines, while my right brain
figures out what to do next, and/or debugs problem(s) being
encountered -- the keystep interface froze but it's still
playing? how do we escape this one without stopping the

so it's more like being able to leave something alone for a
while and trust the machinery underneath to switch me over
if it's necessary. interrupt request: the keystep is still
playing in a fixed autistic loop; we need to temporarily
suspend figuring it out for a bit to go shuffle some fx and
change the drums. but as i'm doing that i'm not thinking
about what knobs to press, i'm also planning. try to save
the project. may not work; who cares, try. flap up some
stuff it's not running with dub feedback to buy myself a
window. reboot. pray

but then i discover i can have a conversation with someone
while doing this, now, and, yeah, i got a bit excited sorry

(and you'd never have known the keystep crashed if you
listen to the recording, btw)


online EpicMegatrax from Greatest Hits on 2021-08-21 06:33 [#02611017]
Points: 18477 Status: Lurker

was just dancing about to "phat planet" by leftfield and i'm
pretty warmed up; dancing a while already. and i jacob
jingleheimer-schmidt my fingers, obviously, to make sword
motions. that i linked this track to a colleague and his
initial reply was, "oh, this sounds like they were
referencing kill bill, it sounds like [haven't analyzed
yet]" but no this was 4 years before bill /bin/kill -9

or maybe there'd be a more witty unix signal to use other
than 9, given how bill... oh, never mind, this is too

just posting to say that i give thousands of hours of
dancing, more thousands of hours driving the car, and also
quite a few running machines, thanks guys, you're my
favorite things in life.


online belb from mmmmmmhhhhzzzz!!! on 2021-08-21 08:52 [#02611034]
Points: 5833 Status: Regular | Followup to EpicMegatrax: #02611017

the dave clarke remix of that is even phatter


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