Multichannel or multi-channel may refer to:
- Multichannel audio, i.e.
- Stereophonic sound, namely two channel audio
- Surround sound, more than two channel audio
- Ambisonics, a studio or live way of recording with many channels
- Offering multiple audio tracks on a broadcast channel: see Sound multiplex in broadcasting
- Multichannel television sound, an American standard for analogue television
- Having or offering multiple television channels: see Multichannel television
- Digital multicast television network
- Multichannel Multipoint Distribution Service (MMDS), a standard for analogue television
- Multichannel television in Canada
- Multichannel television in the United States
- Multichannel marketing
- Multi-channel network, a YouTube classification of for-profit channels
- Multichannel News
- Multicanal (Argentina), a defunct Argentine subscription television and Internet provider company
- MPEG Multichannel
- MADI, Multichannel Audio Digital Interface
- McASP, Multichannel Audio Serial Port
- Scanning Multichannel Microwave Radiometer
- Joint multichannel trunking and switching system
- Multibus, Multichannel I/O Bus
- MVDDS, Multichannel Video and Data Distribution Service
- MMDF, Multichannel Memorandum Distribution Facility