nasaisgramps,
hi. well, I confess to being a newbie at tuning congas, but I am fairly well-qualified to answering your question about musical pitches (I have degrees in both music theory and music composition).
So to your question:
What is the difference between a "C", "G",
and a "E"?
These are all pitches. What consitutes a musical pitch is a bit too deep for what you need to know about conga tuning (lots of acoustical stuff with respect to frequency relationships). Just think of pitch as the qualities of a note that make it sound higher or lower than another note.
Think about a musical notes that your hear from a melodic instrument like a piano or guitar. A note has (at least) two aspects to it, pitch and the duration. In the U.S., we have a system of letters that we assign to the pitches so that we have a way to refer to them. In much of Europe, they use a system of syllables instead of letters (do, re, mi...), but I won't go into that.
The letters are C, D, E, F, G, A and B. If you go above B, then the letters start over again with C, D, E etc. These letters correspond to the white keys on a piano. Now, you might say "hey, what about the black keys of the piano?" Well, some of the lettered notes have notes in between. For example, between C and D, there is the C# (pronounced "see sharp") and it is a black key on the piano. "C#" means pitch that is a little above C. You might also see something like Db or D flat. This means the note that is a little below D and in fact, it is the same as C# (all black notes have two names).
Whew!...believe it or not, I am just scatching the surface of music theory. However, you don't need to know much more. I can imagine you are thinking "how do I know which pitch is which if I am looking at a piano?" Well, check out the images in the links below.
http://www.talkbass.com/images/lessons/keyboard.gif
In the image, you see a pattern of 2 black keys then 3 black keys, then 2 black keys again, etc.? Well, the pitch C is the first white key to the left the 2 black keys and it is labeled in the image.
If you are using a guitar to find a pitch,...well, that's too complex to describe because it's not as visual as the piano.
If you don't have a melodic instrument available, my suggestion is that you purchase a pitch pipe at any local music store. They are cheap, small and have the pitches clearly marked.
By the way, remember that the pattern of pitches repeats. So, when conga players talk about tuning the 11.75'' conga to "C" and the 12.5'' in tumba to "G", they are referring to the the G that is below (not above) the C.
Well, I hope that I helped without confusing you too much.
Best of luck!
cjk
Edited By CongaCaja on Sep. 24 2002 at 07:02