Modulation

Hi can anyone teach me what is modulation in a simple way? Whats the differnece between transpose and modulation?

http://www.google.com/#hl=en&sclient=psy-ab&q=difference+between+modulation+and+transposition&oq=difference+between+modulation+and+tran&aq=0&aqi=g1&aql=&gs_l=hp.3.0.0.12118.18037.1.18827.38.18.0.20.20.2.250.1880.13j4j1.18.0...0.0.5qcGFbO5i9g&pbx=1&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&fp=4e154b18253a8ec1&biw=1680&bih=907

Originally Posted by: allyguitarHi can anyone teach me what is modulation in a simple way? Whats the differnece between transpose and modulation?

Transposition is a complete change of key signature. Modulation is a using notes or chords from a different key, but still remaining in the original key signature (in other words, without changing completely to that other key signature).

To contrast, a modulation can be thought of as a "temporary" change of key signature. :)

Playing a melody or chord progression in the key of A major, then changing it to the key of E major is a transposition.

Playing a melody or chord progression in the key of A major, then playing a B major chord in the middle of it, but still remaining overall in the key of A major is a modulation.

http://en.wikipedia.org/wiki/Transposition_(music)
http://en.wikipedia.org/wiki/Modulation_(music)