Drifft -- Live Spectrum Analyzer
is a program that listens to
audio input and displays a live wavelet-based spectrogram. It
has two qualities that distinguish it from similar
- The Y-axis is scaled logarithmically, just like sheet
music. The clefs and staff lines are real.
- Resolution is adjusted so the bands are comparable to a
semitone. The color wheel is mapped to the octave, so
= same note name.
It works with the built-in microphone as-is.
To use with iTunes, you'll have to split the audio output and
loop one wire back to audio input. Use attachments (found
Radio Shack) like this:
(click to enlarge)
Download & Install (Mac OS X)
Support libraries-- you can throw it away after you run it.
Install this (free) font to get the pretty clefs.
There isn't a manual; documentation is in the tooltips.
This 15 second video explains the basic shapes:
Or, there's a brief prose explanation