3 ms·

I saw a version of this over 30 years ago. One the geek kids in our group who could program assembly found it a giggle to turn the computer lab into a musical

I saw a version of this over 30 years ago. One the geek kids in our group who could program assembly found it a giggle to turn the computer lab into a musical instrument via floppy drive seek commands. Next trick...turn a Tesla into a musical instrument via the motor drives.

qbasic_forever 4y ago
> Next trick...turn a Tesla into a musical instrument via the motor drives. Renault did it some years ago to demonstrate how much control they have on their F1 engine drivetrain: https://www.youtube.com/watch?v=XRXwWbo_mX0 https://www.youtube.com/watch?v=XRXwWbo_mX0
rzzzt 4y ago
Siemens Taurus locomotive engines have some musicality hidden in the power switching section: https://youtu.be/-SDYdHzT7Qw https://youtu.be/-SDYdHzT7Qw
- ChuckNorris89 4y ago
  I wonder what's actually making the noise. PWM on the transformer windings, or PWM on the motor windings themselves, or did they just use speakers? I have so many questions.
  - rzzzt 4y ago
    Overhead power lines are 15 kV, 16⅔ Hz AC in Austria; the drivetrain is of the variable voltage-variable frequency (VVVF) kind, and conversion to three-phase power is done using solid state components. Comments say these switching elements (IGBT or GTO thyristors) apply lower frequency to the motor at start, then gradually increase once it is in motion. So I'd say the "glorified coil whine" comes mainly from the motor windings. More singing: - https://youtu.be/llBI_L21d3g https://youtu.be/llBI_L21d3g - https://www.reddit.com/r/trains/comments/ilxxt7/these_trains_in_japan_nicknamed_singing_trains/g3wr668/ https://www.reddit.com/r/trains/comments/ilxxt7/these_trains...
- speed_spread 4y ago
  Montreal's Metro old cars had a similar three-note signature sound. The notes have preserved as the "door closing" chime in the new cars: https://youtu.be/Hu_1JM_UiuA https://youtu.be/Hu_1JM_UiuA
MBCook 4y ago
A great many years ago (early 2000s) I tried to get a number of computers to play a simple melody in harmony using PC speaker beeps. To try to keep them in sync I used broadcast Ethernet packets. It worked. Sort of. Then fell out of sync. They were generally on time (thanks to the sync) but had enough difference to be easily noticeable and kind of annoying. Not unlike a first school band recital. It was fun. Half the project was getting the speakers to beep because that’s a Win16 function I was calling from a Win32 context and I had to thunk into it.
- deleted 4y ago
  [deleted]
aidos 4y ago
in the same vein, I always loved this Radiohead Nude remix https://vimeo.com/1109226 https://vimeo.com/1109226
- dannersy 4y ago
  This has stayed in my bookmarks for 14 years. Great stuff.

qbasic_forever 4y ago

> Next trick...turn a Tesla into a musical instrument via the motor drives. Renault did it some years ago to demonstrate how much control they have on their F1 engine drivetrain: https://www.youtube.com/watch?v=XRXwWbo_mX0 https://www.youtube.com/watch?v=XRXwWbo_mX0

rzzzt 4y ago

Siemens Taurus locomotive engines have some musicality hidden in the power switching section: https://youtu.be/-SDYdHzT7Qw https://youtu.be/-SDYdHzT7Qw

ChuckNorris89 4y ago
I wonder what's actually making the noise. PWM on the transformer windings, or PWM on the motor windings themselves, or did they just use speakers? I have so many questions.
- rzzzt 4y ago
  Overhead power lines are 15 kV, 16⅔ Hz AC in Austria; the drivetrain is of the variable voltage-variable frequency (VVVF) kind, and conversion to three-phase power is done using solid state components. Comments say these switching elements (IGBT or GTO thyristors) apply lower frequency to the motor at start, then gradually increase once it is in motion. So I'd say the "glorified coil whine" comes mainly from the motor windings. More singing: - https://youtu.be/llBI_L21d3g https://youtu.be/llBI_L21d3g - https://www.reddit.com/r/trains/comments/ilxxt7/these_trains_in_japan_nicknamed_singing_trains/g3wr668/ https://www.reddit.com/r/trains/comments/ilxxt7/these_trains...
speed_spread 4y ago
Montreal's Metro old cars had a similar three-note signature sound. The notes have preserved as the "door closing" chime in the new cars: https://youtu.be/Hu_1JM_UiuA https://youtu.be/Hu_1JM_UiuA

MBCook 4y ago

A great many years ago (early 2000s) I tried to get a number of computers to play a simple melody in harmony using PC speaker beeps. To try to keep them in sync I used broadcast Ethernet packets. It worked. Sort of. Then fell out of sync. They were generally on time (thanks to the sync) but had enough difference to be easily noticeable and kind of annoying. Not unlike a first school band recital. It was fun. Half the project was getting the speakers to beep because that’s a Win16 function I was calling from a Win32 context and I had to thunk into it.

deleted 4y ago
[deleted]

aidos 4y ago

in the same vein, I always loved this Radiohead Nude remix https://vimeo.com/1109226 https://vimeo.com/1109226

dannersy 4y ago
This has stayed in my bookmarks for 14 years. Great stuff.