| Analogue audio – groove carriers | Obsolesence |
|---|---|
| Cylinders (replicated wax or moulded) 1876 – 1929 | Obsolete |
| Cylinders (instantaneous / dictaphone) 1876 – 1950s | Obsolete |
| Coarse groove disc (78 rpm and similar) 1888 – c.1960 | Obsolete |
| Transcription disc (pressed) 1930s – 1950s | Obsolete |
| Instantaneous lacquer disc 1930s – 1960s | Obsolete |
| LP (long playing) microgroove 1950s – present | Soon to be Obsolete |
| Metal Part | Obsolete |
| Analogue audio – magnetic carriers | Obsolesence |
|---|---|
| Wire 1930s – late 1950s | Obsolete |
| Magnetic tape reel-to-reel 1935 – present | Obsolete |
| Talking Book Metal Cartridge | Obsolete |
| Cartridge 1960 – present | Obsolete |
| Compact cassette 1960s – present | Just Finished < 2 years |
| Beta PCM and Hi-Fi Audio | Obsolete |
| VHS Half Speed Longitudinal Audio | Just Finished < 2 years |
| 1/2” Beta Domestic High Fidelity Audio | Obsolete |
| Digital audio & analogue – magnetic – tape carriers | Obsolesence |
|---|---|
| VHS PCM and Hi-Fi Audio | Just Finished < 2 years |
| Digital audio – tape carriers | Obsolesence |
|---|---|
| Digital 8 track audio (S-VHS) | Obsolete |
| Digital Compact Cassette | Obsolete |
| Beta PCM Audio Only | Obsolete |
| VHS PCM Audio Only | Just Finished < 2 years |
| U-matic Audio Only (1630 or 1610) 1979-80 – present | Just Finished < 2 years |
| Digital 8 track audio (Hi-8) | Just Finished < 2 years |
| DAT Digital Audio Cassette 1980 – present | Just Finished < 2 years |
| Digital audio – disc carriers | Obsolesence |
|---|---|
| Bernoulli Box – 20Mb flexible disk cartridge | Obsolete |
| Compact disc (CD)1980 – present | Current |
| Compact disc recordable (CDR) 1980 – present | Current |
| Super Audio CD (SACD) 1999 - present | Current |
| Magneto-Optical-Disk (MOD) | Obsolete |
| Mini Discs (MD) – present | Current |
| Digital audio – other | Obsolesence |
|---|---|
| Piano roll (88 note) 1902 – present | Declining |
References
Edmondson, Ray., 2004,Audiovisual Archiving: Philosophy and Principles, United Nations Educational, Scientific and Cultural Organization, Paris. p. 73, with additions by the NFSA.