"they pulled some unorthodox moves to finally break Ingham’s bound"
Why is taking methods from other fields an unorthodox move? I come from an engineering background an there it is the common case. The usage of harmonic analysis is a staple in many fields (audio, waves, electrical analysis, statistics) and of course the algorithms are pure math under the hood. If I want to find a reaccuring structure in an underlying system, wouldn't it be normal to try different plotting techniques and choose the one that suits my problem best?
Is there any functional difference to the EP-133? Interestingly It seems that they have different operating systems.
https://teenage.engineering/downloads