Can you make out any kind of melodic movement at all?
In trying to answer that question I hit two obstacles: I couldn’t hit the notes I needed to reliably, and I already knew what to expect.
To deal with the competence problem I used MuseScore software to compose and play back for me, and as for the bias due to expectation—I can’t solve that for myself unless/until I script something to take a random tune and generate the silhouette tune automatically, but I can solve it for you by obfuscating the title of the tune.
I chose to use as a “background” the collection of all the notes used in a tune. For each note in the original tune I played this background without that original note. I thought of it as like a ghost in the background noise.
Does that ghost, that absence, make something melodic?
Youtube video of Gjvaxyr (I am still learning ffmpeg. Please forgive the video quality. The audio was assembled with Audacity.)
Those who have some musical background will predict that the result will be dissonant, and so it is.
I think I can sort-of hear something, that is vaguely like the original—sometimes.
Later I’ll look into removing chords rather than single notes, though I expect it will still be dissonant.
I wonder under what conditions would the ghost tune not be dissonant. A base song with notes only from a chord, yes--others?
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