c
- Cadence
- Cadential six-four
- Cadenza
- Caesura
- Cambiata
- Canon
- Cans
- Cantus firmus (CF)
- Canzona
- Canzonet
- capacitance
- capacitor
- capstan
- Cartage
- Cascading Style Sheets
- CAT5
- Catalog
- Category 5
- C clef
- CD
- CD-ROM drive
- CE marking
- center frequency
- CGI
- Chaconne
- Chance music
- Changing meters
- Chanson
- chip
- Chorale
- Chorale prelude
- Chord
- Chord with split members
- chorus
- Chorus
- chroma key
- Chromatic
- Chromatic mediant relationship
- Chromatic pitch
- Chromatic pivot chord
- Chromatic scale
- Circle of Fifths
- Classical period
- Clearance
- Clearance agency
- Clef
- Click track
- clipping
- Clipping
- Close position
- Clover key
- CLUT
- CMYK
- coax
- coaxial cable
- Coda
- color look-up table
- color perception
- color temperature
- Combinatoriality
- Comes
- Command key
- Common Gateway Interface
- compact disc
- Compact Disc Types
- Complex meter
- component video
- composite video
- Compound interval
- Compound melody
- Compound meter
- Compound ternary
- compressed audio
- compression
- compressor
- Compulsory license
- Concert master
- Concerto
- condenser microphone
- Conjunct
- Console
- Consonance
- Consonant fourths
- constant-Q equalizer
- Continuo
- Continuous ternary
- Continuous variations
- contour control
- Contrafact
- Contrary motion
- Control room
- control track
- cookie
- Co-publishing
- copyright
- Copyright
- Copyright infringement
- Copyright notice
- Cori spezzati
- Counterexposition
- Countersubject
- Cover
- cps
- Crescendo
- crest factor
- crossfader
- cross-hatching
- crossover
- Cross-relation
- cue
- Cue
- current
- cut
- cutoff frequency
- cycles per second