umm and reading sheet music...
I was going to enroll to classes near my home,but alas they dont teach guitar..
one question:can you tune your guitar by ear/recognise a single note played by listening to it?
cos i cant
Well, I can't either
But I can identify resonance. Therefore, if I can get the tuning right on any one string with a tuner, I can tune the rest by ear.
The main concept you need to know is beats. This is not the music theory "beats" but acoustics beats. When two sounds of similar (but not same) frequency is played together, you can hear the the resulting sound pulsates (called waxing and waning). The faster the pulsating, the more out of tune the strings are. Therefore, while tuning, you must fret the note you want on a string that is already tuned, play this and the string you want to tune together and compare the beats. Then you gradually adjust the string tension to reduce the beats until they are non-existent (resonance). This means that the string is now tuned. You can repeat these steps for the rest of the strings.
Edit : The same procedure can be used if you don't have a tuner. You can play a sound of say, the Low E string (E2, appx 82Hz) on your cellphone as a MP3 file or on your keyboard and you can use the same technique above to tune the strings.