<p>Lol, it's sort of disconcerting that it took so long to come up with an answer to the notation issue. I meant to post last night when I got home from work, but I fell asleep :-P</p>
<p>Anyways, dancersmom is right (in her most recent post); you're both referring to two different systems. The Helmholtz pitch notation identifies middle C as c1, while the scientific pitch notation calls middle C, C4. There are other pitch notations, but they're very rarely used by singers.</p>
<p>Helmholtz is the older system used, but the latter system is definitely more common, as Helmholtz' has become dated. </p>
<p>Also, it's a pointless argument saying that piano location/keys are irrelevant, because both of these systems base their notation off of an 88-key piano. Otherwise, you wouldn't have said anything about the subcontra octave, which only applies to A2 (Helmholtz) or A0 (scientific) up to the lowest C on a keyboard (C1 Helmholtz, C1 scientific). </p>
<p>And no, pitch is not different on different instruments (C4 is C4 is C4 is C4); however, BroadwayJen07 was correct that different instruments call middle C different things. While singers refer to C4 (or c1 in Helmholtz) as middle C, other instruments may refer to C5 (c2 Helmholtz) as middle C. So in that sense, she is correct. </p>
<p>So, in "standard music notation" as dancersmom says (that which is most commonly used, especially presently), BroadwayJen07 was in the right. </p>
<p>Also, as dancersmom didn't continue (just for education's sake), the octaves are called (starting from lowest note to highest) subcontra (A2-B2 Helmholtz/A0-B0 scientific), contra (C1-B1/C1-B1), great (C-B/C2-B2), small (c-b/C3-B3), one-line (c1-b1/C4-B5), two line (c2-b2/C5-B5), three-line (c3-b3/C6-B6), four-line (c4-b4/C7-B7), five-line (c5/C8).</p>
<p>So yeah, there it is. And as a side note, I don't think either of the posters were ruder than the other. :-P</p>