LÖVE

The amount of samples in a song basically defines how good the quality of the audio is. Usually, the sample rate is 44100 for regular CDs, meaning 44100 numbers between -1 and 1 per channel and second.

To visualise this song, I deduce a pixel position by taking a sample from the left channel as the X position and a sample from the right channel as the Y position.
Since the coordinates are (-1 < x < 1, -1 < y < 1), I need to decide where to put each point in the full window.

The finished position looks something like this: (getWidth() / 2 + getWidth() * x, getHeight() / 2 + getHeight() * y).

But how do you get multiple pixels on the screen at the same time? How do you know how many samples to draw per frame?

EDIT: Oh, you probably use dt to decide the number of samples.

It's open source

Of course.

thread ressurection warning

seriously i would really love to make a visualizer, how do you get this data into Love 2D?

DarkShroom wrote: ↑Wed Jun 20, 2018 12:11 am thread ressurection warning

seriously i would really love to make a visualizer, how do you get this data into Love 2D?

0. Stop resurrecting dead threads, and open a new one
1. Create SoundData (Either empty or from a music file)
There, now the data is there, and you can access it with :getSample().
As for how to actually visualize things, that's up for the reader to figure out (There are tons of methods, even for just a plain and simple oscilloscope)
But let me post an image of one of the many projects i made in löve, albeit not yet released, to illustrate what's possible.

Nice looking

That looks like a spectrogram! IMO spectrograms look sooo much nicer when the magnitude at each pixel is represented by a palette colour, preferably ranging from black through cold then warm colours, peaking at bright yellow or white e.g. https://www.youtube.com/watch?v=yzFit0nldf4

pgimeno wrote: ↑Wed Jun 20, 2018 9:08 am Nice looking

That looks like a spectrogram! IMO spectrograms look sooo much nicer when the magnitude at each pixel is represented by a palette colour, preferably ranging from black through cold then warm colours, peaking at bright yellow or white e.g. https://www.youtube.com/watch?v=yzFit0nldf4

Agreed, it would make more sense, but since i was coloring the sine-decomposition circles in the background, i didn't want the spectrogram to be too distracting... the upside is i know the perfect combination of blendmodes to clear one line every time, the downside is that it can only show 256 separate values since monochrome.

Can you reupload this?

anyone with a copy? i got a 404 for pretty much everything