Crunchy FM synth and NES pulse waves ripping through classic Konami arcade themes. Senryoubako is a 1989 compilation pulling from the Famicom, MSX, Game Boy, and arcade era. "Vampire Killer" from Castlevania shows up again, "Farewell" from Gradius II hits hard, and you get deep cuts like "Skywalker" from Thunder Cross alongside arcade originals like Scramble, Frogger, and Gyruss.
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There is even a "Mr. Moai's Secret Sound Tech Lecture" which is exactly the kind of weird bonus content Konami used to include. Plus a Famicom Ending Best 10 countdown. Late 80s Konami sound hardware at its sharpest. Every chip doing work.
If you want a time capsule of when Konami was the king of arcade and console sound, start here.