Laser harp

General
1

Does anyone know of any videos of ways to use midi notes for the laser harp effect? I imagine this could be pretty wild .

2

I don’t think there are any videos as of yet, i did play around with it mapped to my little midi keyboard and worked great!

I had almost no experience in MIDI and did figure it all out in 10-20 minutes or so..

I’m still looking to build a device that translates my hand movement into those MIDI notes, but that is a whole different saga :stuck_out_tongue:

try it out for yourself and if you’re stuck, tell me and i will see if i can make a short video or some screenshots to show how i did it when i did….

3

Sorry to jump in on this. I’m currently trying to build one myself. The approach im using is to have a camera pointed at the beams, using openCV/python to detect beam interuptions to trigger midi signals to a DAW. It works reletively well. Im completely new to Liberation and node based systems so the biggest hurdle im currently having is animating a single beam fanning out into 7 beams. I feel a little stupid as this seems sooo basic, but I cant seem to get my head around it.Would love some suggestions or pointers on the best way to do this.

4

Here is a complete guide to build a laser harp.

Unfortunately it’s in German.

https://www.heise.de/select/make/2017/1/1488479314323365

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5

Here is a way to do it. Use grid node, select 7 for x axis. You want to animate the spacing with a saw. Repeat Count = 1. Single play through that holds at 7 dots. Use the “ retrigger” button on the clip editor panel to play clip again from start if you want to replay again.

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6

Hi Stephan, thank you for the link. I’ve built something similar in the past using an Arduino and an MCP4822 DAC. https://youtube.com/shorts/ge8rB1FEKCE ( yes its held together with wood and lego)

Whilst it was great for tinkering and learning, I found the sensors unreliable and the capabilities quite limiting. This was my first project, so no doubt it could be improved upon. I’m hoping to use Liberation to incorporate more lasers to make the whole thing more of a spectacle.

Thanks for your reply, it’s really appreciated.

7

OMG this is great! Thanks so much, I can’t wait to give it a try. So far I’ve been adding single dot nodes and trying to animate them individually. Thank you so much for your help.

8

For expert level nuanced animation, try adding an ease-out or an ease in-out to the sawtooth oscillator. :grinning_face:

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9

Thanks everyone. I managed to do it using the custom wave form node to add a delay on open and close. Thanks for the help :heart:

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