Nordloef / Snorpung - Is That a Demo in Your Pocket? - DemoScope 

A demo for the Gameboy written in 2015 by Snorpung with music composed by Nordloef
Found an emulator that properly draws waveforms, despite the sample rate being 44100 Hz.
The emulator in the background is bgb, not the same emulator I used to get the waves.
Channels
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Square 1
Mix of panning (Square 1 Right, Square 2 Left)
Square 2
Wavetable
Noise