cross-posted from: https://slrpnk.net/post/18727441
this post was submitted on 22 Feb 2025
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It's not supposed to represent waves at different angles.
Rather it represent an axis (the one on the right) for each frequency of waves that is contained in the signal (on the left)
Here the signal is made up of two different frequency waves and the graph on the right is there to show the value of thoses two and their respective magnitudes.