To anyone who listens to this, I recommend rewinding to the segment starting at 1:23 a few times and not letting it reach the spoilers. After a few rounds, my brain adjusted to the distortion and I could make it out perfectly, without ever hearing the original.
Re:Codec2: A Whole Podcast on a Floppy Disk
by tototomtoboro on Sunday June 24, 2018 @10:17AM
(#17386638)
Wow this is amazing, after listening to this a couple of times the voice became super clear
Sine-Wave Speech Demonstration https://youtu.be/EWzt1bI8AZ0?t=74
> Sine-wave speech is an intelligible synthetic acoustic signal composed of three or four time-varying sinusoids. Together, these few sinusoids replicate the estimated frequency and amplitude pattern of the resonance peaks of a natural utterance (Remez et al., 1981). The intelligibility of sine-wave speech, stripped of the acoustic constituents of natural speech, cannot depend on simple recognition of familiar momentary acoustic correlates of phonemes. In consequence, proof of the intelligibility of such signals refutes many descriptions of speech perception that feature canonical acoustic cues to phonemes. The perception of the linguistic properties of sine-wave speech is said to depend instead on sensitivity to acoustic modulation independent of the elements composing the signal and their specific auditory effects.
~ http://www.scholarpedia.org/article/Sine-wave_speech