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 | This article needs additional citations for verification. (July 2009) |
 A typical early S1 MP3 player. | |
| Manufacturer | Various[a] |
|---|---|
| Type | Portable MP3/WMA Player |
| CPU | Various; Z80 compatible + 24-bit DSP |
| Storage | Various |
| Display | None, monochrome dot-matrix, or color LCD |
| Sound | 20 Hz to 20 kHz |
| Connectivity | USB Full-Speed |
| Power | AAA battery/Rechargeable battery on some models |
The loosely defined category of S1 MP3 players is comprised by a large amount of then-inexpensive handheld digital audio players.[1] The players were mainly widespread around 2005–2006[citation needed] but the series continued for years afterwards, blurring into that of so-called "MP4 players" employing S1 and competing architectures.
Despite being primarily defined by the use of a system-on-a-chip of one of the Actions brands[2] usually of the ATJ20xx series and some common core features, S1 products vary widely in software and hardware as well as design (including lookalikes and even counterfeits of other players), leading to a jumble of hard to identify internal designs, all employing non-mutually-interchangeable firmwares.
Cite error: There are <ref group=lower-alpha> tags or {{efn}} templates on this page, but the references will not show without a {{reflist|group=lower-alpha}} template or {{notelist}} template (see the help page).
- ^ "S1mp3 device database". s1mp3.org. Archived from the original on 2011-09-02. Retrieved 26 June 2021.
- ^ "Actions SoC Family". s1mp3.org. Archived from the original on 2011-11-02. Retrieved 26 June 2021.