8th-note
Your pre-recorded 7-1/2" tapes: make sure DBX is OFF.
and, some, they recorded L/R signal strengths differently on purpose, watch meters, listen, adjust, enjoy. Mine definitely beat CD or SACD. SACD for me is simply a lower noise floor, music emanates from aural darkness, sometimes un-natural quiet.
Tape does have some hiss in quiet passages, as used LPs has some surface noise. We train our brains 'not to hear' the hiss or LP surface noise. After years of CDs only, I had to re-acquire the ability to not hear LP surface noise
My friend's 15 IPS 2 track is Phenomenal, way beyond 7-1/2 IPS 4 track; LP, CD or SACD.
Next visit, I expect terrific sound from the 2T 15 IPS Jazz tapes he has been buying.