Pick your isotopes from the Chart of the Nuclides. The program plays the energy level decay cascade as a series of notes that sound (to me) like a xylophone/marimba. You can change volume, pitch and tempo of each, as well as the waveform played — square and triangle waves sound more “techno” (I picked the isobaric combo of Ce, Xe and Cs, all -135). There’s also a visual of nuclei emitting the gammas. Interesting.