SlotMusic

slotMusic was a brand of microSD^[1] memory card developed by SanDisk preloaded with music in MP3 format.^[1]^[2] They were first available at Wal-Mart and Best Buy stores in October 2008.^[3] The current selection of songs comes from Universal Music Group, Sony BMG, Warner Music Group and EMI Music.^[1]^[2] As of mid-2011, SanDisk's website lists a total of 14 albums available in the SlotMusic format.

The audio files contain no digital rights management,^[2] and are encoded at minimum bitrates of 256 to 320 kbit/s.^[2]

A slotMusic albums may also include high-quality images and videos in multiple formats.^[2] The contents of each microSD card may be altered by the user, enabling them to add or remove files from the slotMusic card as desired.^[2] Another type of card, slotRadio, was developed in 2009 which had radio-like controls. A slotRadio card had more restrictions on how it worked, such as not being able to backtrack to a previous song.

References

^ ^a ^b ^c Maney, Kevin (2008-09-22). "SanDisk's New SlotMusic: But Why?". Portfolio.com. Retrieved 2008-12-02.
^ ^a ^b ^c ^d ^e ^f ""slotMusic": High Quality, DRM-Free MP3 Music on microSD Cards" (Press release). SanDisk. 2008-09-22. Retrieved 2008-12-02.
^ "slotMusic Cards Now Shipping: More Than 40 Top Artists Available from Nearly Every Genre of Music" (Press release). SanDisk. 2008-10-15. Retrieved 2008-12-16.

Physical audio recording formats

Mechanical

Music box cylinder or disc (9th century)
Mechanical cuckoo (early 17th century)
Punched card (1881)
Music roll (1883)

Analog

Grooved surface	Phonautogram (1857)
Grooved cylinder	Phonograph cylinder (1877) Graphophone/Dictaphone cylinder (1887) Perfected phonograph/Ediphone (1888) Salon cylinder (1890s) Stentor cylinder (1890s) Le Céleste cylinder (1890s) Gold moulded record (1902) Indestructible record (1907) Amberol record (1908) Blue Amberol record (1912) Paradis cylinder (1913)
Grooved disc	Phonograph record (1889) Pathé disc (1905) Diamond disc (1912) Pathé Actuelle (1920) Edison Voicewriter (late 1940s) SoundScriber (1945) Audograph (1945) Long play (1948) Highway Hi-Fi (1956) Bandai 8ban (2004)
Grooved tape	Tefiphon/Teficord (early 1930s), Tefifon Dictabelt (1947)
Sound-on-film	Phonofilm (1919) Tri-Ergon (1922) Movietone (1926) Photophone (1929) Fantasound (1940)
Loose magnetic wire	Wire recording (1898)
Magnetic wire cartridge	Lorenz Textophon (1942) US Army RD-11B/GNQ-1 (1944) Cosmos Industries MX-303A/ANQ-1 (1944) RCA MI-12875 (1947) RCA MI-12877 (1947) Peirce 265B (1951) Peirce 330/360 (1951) Protona Minifon P51 (1951) Protona Minifon P55 (1955) Protona Minifon special (1961) Crouzet-Jaeger cartridge (1962)
Magnetic surface	Magnetic stripe card (1900)
Telefunken magnetic disc (1945) Thermionic Products Recordon (1948) Record Maker Pye (1953) Synchrofax (1959) Audio High Density (1978)
Loose (reel-to-reel) magnetic tape	Blattnerphone (1928) Magnetophon (1935) 1/4" tape (1949) 1/2" tape (1953) Fullcoat magfilm (1953) Stripe magfilm (1953) 1" tape (1957) 2" tape (1967) 3/4" tape (1969) 3" tape (1978)
Magnetic tape cartridge	Optaphon (1951) Cousino Echo-matic (1952) Mohawk Message repeater cartridge (1953) Stenorette (1954) Mohawk Midgetape RL (1955) Dictaphone Dictet (1957) Rediffusion Reditune (1957) Saba Sabafon (1958) RCA tape cartridge (1958) Philips EL 3581 (1958) Protona Attaché (1959) Fidelipac (1959) Cousino MR-9000 (1960) IBM Magnabelt (1961) Dictaphone Travel master (1961) Nippon Electronic Vity cassette (1961) Grundig Cassette LFH 0084 (1962) Orrtronic Tapette (1962) 3M Scotch (1962) Cousino Echo-matic II (1962) Stereo-Pak (1962) Philips EL 3583 (1963) Compact cassette (1963) Grundig En3 (1964) Sabamobil (1964) 8-track (1964) Micro pack 35 (1964) Assmann-Stuzzi Memocord (1965) Cantata 700 (1965) DC-International (1965) Nippon Electronic Memo-call (1965) PlayTape (1966) Muntz Stereo Mini-twin (1967) Grundig DeJ614 (1968) Microcassette (1969) Sanyo Tape cartridge (1969) HiPac (1971) Steno-Cassette (1971) Stenorette DL (1972) Capitol Records Audiopak (1972) Elcaset (1976) Bandai micro cartridge (late 1980s) Picocassette (1985) Pocket Rockers (1988)

Analog-to-digital converter

Soundstream (1976)
X80/ProDigi (1980)
DASH (1982)
PCM adaptor (1982)
DA-88/DTRS (1993)

Digital

Magnetic tape cartridge	Digital Audio Tape (1987) NT (1992) Digital Compact Cassette (1992)
Sound-on-film	DD (1986) CDS (1990) SDDS (1993)
Optical disc	Compact Disc Digital Audio (1982) Philips CD-BGM (1989) MiniDisc (1992) DTS (1993) HDCD (1995) Super Audio CD (1999) DVD-Audio (2000) DataPlay (2002) Hi-MD (2004) DualDisc (2004) BD-Audio (2008) HFPA (2013) MQA-CD (2014)
Electronic circuit	Sound chip (late 1970s) MP3 player (1996) HitClips (2000) Yaboom Box (1999) Takara E-kara (2001) Toymax VJ Starz (2002) USB flash drive (2004) MicroSD (2007)