Hey, is the heavy D on a drop D tuned guitar the SAME "D" that's on a bass with standard tuning?  or is it an octave above or below?

I know I should just go over there, put a guitar in drop D tuning, play that D and see if sounds like the D on a bass: E, A, D! G...compared to a guitar: D! A, D, G, B, E.  It seems about right but sometimes the tones and harmonics can be deceiving, and I want to hear an answer from somebody that has had more music theory than I.

husoski2020-03-23T23:27:44Z

Yep.  It's D₂ (73.4162 Hz) both ways.  The Wikipedia article has more info, but "bass"ically, the 4 strings on a bass guitar in standard tuning are one octave below the low 4 strings on a guitar.  So the bass's string 2 (assuming bass guitar strings are numbered from high pitch down like a regular guitar) is an octave below string 4 on the guitar, and the low drop-D is also an octave below the string 4 D.