1. To adjust the pitch, tone, or volume of.
2. To change the key of, in music
3. To vary the frequency, amplitude, phase, or other characteristic of (electromagnetic waves).
Menjati, izvijati (glasom), praviti prelaze, imati melodične prelaze, menjati ton u melodiji i harmoniji. (lat.)
To change some aspect of a signal intentionally, usually for the purpose of transmitting information.