Yup! The speed of sound (of the air inside your instrument, not of the surrounding air) determines how many times per second the sound can travel back-and-forth through the acoustical length of the instrument. As an example, if it was your job to drive back-and-forth between two cities without stopping, the number of times you could complete the round trip each day (your frequency) would depend on your speed -- increasing your speed from 50 mph to 60 mph would increase your frequency by 20%. This article might be of interest:Z-Tuba Dude wrote:I'm not sure the speed of sound through the air, should effect the pitch. It would mean that the sound will get to you faster, but the frequency of the sound waves being generated should not change! Am I missing something?.....Air is less dense when it is 20 degrees hotter than normal and sound waves move faster through it, thus the pitch goes sharp. For those of you who are technically oriented, forgive me for generalizing the explanation.
http://en.wikipedia.org/wiki/Speed_of_sound