what about filtering the waves based on frequency (ie cut spectrum into highs, mids, lows), and have different colors for the different freq regions?

[wolfbiter]

this is a little more of a wishlist thing, buuuut... it would be reeeeally sweet.... and i know webaudio has the capability (i'm sure there are plenty of examples online). i would possibly consider doing it myself, but this wouldn't take priority until the far future

[katspaugh]

Like this one: https://github.com/aalin/canvas_waveform ? Yes, that would be cool!

[katspaugh]

It seems amplitudes (waveform) are independent of frequencies (spectrogram). I think what we might add is just a spectrogram. Closing this issue for now. If you come up with an implementation, fill free to make a pull request :)

[feng-x-w]

Why is the spectrum not colored?I think that might be better