Tuning can refer to:
- Musical tuning, musical systems of tuning, and the act of tuning an instrument or voice
- Guitar tunings
- Piano tuning, adjusting the pitch of pianos using a tuning fork or a frequency counter
- Radio tuning
- The process of tuning a tuned filter
- Performance tuning - the optimization of systems, especially computer systems, may include:
- Computer hardware tuning
- Database tuning
- Car tuning, an industry and hobby involving modifying automobile engines to improve their performance
- Engine tuning, the adjustment, modification, or design of internal combustion engines to yield more performance
- Neuronal tuning, the property of brain cells to selectively represent a particular kind of sensory, motor or cognitive information
- Self-tuning
- "Tuning", a song by Avail from their 1994 album Dixie
- Tuning, a psychokinetic ability in the 1998 film Dark City