post your eye melty abstracts here

[HankLloydRight]

LWave visualization- the sound is the stereo XY signal.

Is this video a laser projector or a visualization? Can you convert that to an ILDA or WAV file? Or the XYRGB math to create it? That's a really awesome effect!!

[dchammonds]

Is this video a laser projector or a visualization? Can you convert that to an ILDA or WAV file? Or the XYRGB math to create it? That's a really awesome effect!!

Yes it's a visualization, but it looks fine on a good projector and with a little gamma correction, it can also do decent photo rendering with an imported BMP. LWave uses ffmpeg to batch convert its wav/bmp output to mp4 video.


Attached are ild files (I could provide wav if you want). Thanks for the feedback!


Photo demo:

[HankLloydRight]

Thanks for the ILD files -- works and look great!!

I think I'm going to try and re-create this in code. not sure if I'll succeed.

[dchammonds]

Thanks for the ILD files -- works and look great!!

I think I'm going to try and re-create this in code. not sure if I'll succeed.

For best results when generating a spiral, ensure that the data points are equally spaced as the radius increases. A vinyl LP spins at a constant speed, so the signal gets packed tighter and tighter as you go from outer to inner grooves. In an audio CD, the rpm decreases as you go from inner to outer to maintain constant data spacing as shown in the illustration. When you listen to the spiral XY audio, you'll notice it's a tone that sweeps down from high to low pitch while it increases in amplitude with a cosine-sine relationship between left and right channels.

As I recall, the process involves taking the square root of stepping evenly through the 0-1 proportional plot interval as you generate.

[HankLloydRight]

Great info, thanks!

I did notice when I slowed the scan rate down to about 500PPS, the inner circles drew very very fast and then it slowed down as it completed. Neat effect.