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 selection of songs came from Universal Music Group, Sony BMG, Warner Music Group and EMI Music. [1] [2] As of mid-2011, SanDisk's website listed 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]
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.
