Hi, Im working on a pure data vanilla and Ofelia project. Its a granular synth that works on only some selected parts of a frequency spectrum. kind of like IZtope Iris. What I want is to choose an audio file, generate a spectrum off of it, and display it all at once. it needs to be accurate to the frequencies.
The highest frequency in the spectrum would be 7536.62hz, all spaced 43.0664hz apart, making 175 bands.
would anyone know how to do this in Ofelia?
Im looking for something like this: Example image

I would like a more flat, linear, even scale on this, so that I can have some sort of keyboard display on the left side relating to the pitches of the frequencies like the image.

Hi @Kitty Dyson. I tried to port a spectrogram shader to ofelia. Just updated it for Ofelia v3. You need to change it a bit for your desired result.
You can download it here (it is the sonogram patch): https://forum.pdpatchrepo.info/topic/12168/3-shader-adaptions-sonogram-vectorscope-and-conway
But I am sure you can implement a spectrogram without shaders too.

@Jona yes, thats kind of what Im looking for, but I still need to find a way to take a whole audio file and print the spectrum all at once. Im thinking this is more of a pure data question than an Ofelia one.

@Kitty Dyson perhaps you need some non realtime fft then? the timbreID library can achieve that:
"As of version 0.3.0, all of the features have a non-real-time version for analyzing samples loaded to arrays. This makes the training step very convenient for things like concatenative synthesis and timbre plotting."
http://williambrent.conflations.com/pagez/research.html
I am not sure.