Another guitar-tuning trick: if you don't have a reference tone at hand (and if you don't have absolute hearing), but you do have a television, you can use the screen-frequency to tune your guitar. The television screen flickers at 50 hz (at least, in PAL countries). Look at your g-string with the tv screen as background (holding your guitar sideways), and tune it until the you see a static waveform (it's much like looking at an oscilloscope). A g is at 196 hz, so you will be 4 hz off. With NTSC sets, I guess you could use the b which is at 123 hz, 3 hz above the 120 Hz flicker. maarten
