I've found a nice formula to calculate the new pitch at a samplerate change, here in this forum.
The result is in cents. And this bothers me a lot, 'cause the value of a cent depends of the frequency of the two semitones the cent is between, and so i don't understand that cents ... cents of what?
What's the final tune of a A4 (440Hz) sine wave, sampled at 48KHz, if played at 44.1KHz? Have i to calculate the value of the first 100 cents (between A4 and G#4) and the remaining 46.7 between between G#4 and G4?
I'm a bit lost ....