TRICHORDS
This randomly generates the 19 uniques sets of trichords found in the 12 note equal-tempered scale, distributed across a 4 octave range. Trichords are revealed in prime form. It also should show any inversional equivalence to another trichord, but is a little buggy sometimes.
I made this trichord ear-training tool to attempt getting better at intuitively feeling these pitch-sets as distinct sonorities/flavors, as immediately and timbrally-identifiable as major or minor.
(Note, if you’re on a phone and don’t hear anything, try switching your little sound switch back on)