Multichannel may refer to:
- Multichannel audio, i.e.
- Stereophonic sound, namely two channel audio
- Surround sound, more than two channels though still technically stereo
- Ambisonics, a studio or live way of recording with many channels
- Multichannel Multipoint Distribution Service (MMDS)
- Multichannel television
- Multichannel television sound
- Multichannel television in Canada
- Multichannel marketing
- 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