# Rio Audio

Rio was a line of digital audio players and related audio products. Its first release, the Rio PMP300 digital music player (also known colloquially as simply the "Diamond Rio"), released by Diamond Multimedia in 1998, was one of the earliest notable and commercially successful devices in its category. It also became known as the target of an early lawsuit regarding the legality of such devices. Following the PMP300, various music players were released under the Rio brand name by a number of companies until the brand was retired in 2005.

## History

Rio was originally a brand of California based Diamond Multimedia. Rio Audio was best known for producing the Rio PMP300 model that was the impetus for a lawsuit in 1998 by the Recording Industry Association of America. That lawsuit eventually failed, leading the way for the portable digital music industry to take off.
Diamond Multimedia merged with S3 Graphics in 1999 - the resulting company was renamed SONICblue. Rio, Inc., a subsidiary of SONICblue, was formed in 2000. The company referred to itself as Rio Digital Audio— in later years this changed to simply Rio Audio. During this time, Rio's president was Jim Cady.
On March 21, 2003, SONICblue filed for Chapter 11 bankruptcy protection and then sold off its main product lines; Rio Audio was sold to Japanese firm D&M Holdings, which owned audio brands such as Denon, forming part of their Digital Networks North America subsidiary. Rio Audio was based in Santa Clara, California. Its president from that time until March 2004 was Jeffrey Hastings.
Like some other competitors in the digital audio player business, the Rio brand was unable to compete effectively against Apple's dominant iPod series of audio players. In August 2005, D&M Holdings announced the discontinuation of its production of audio players, after it had licensed its digital audio software technology to chipmaker SigmaTel the month before. The Rio brand and trademarks were retained by D&M Holdings.

## Products
### Rio USA
#### Portable digital audio players

| Release Year | Player | Memory type | Memory space | Display backlight | WMA | FM radio | Voice recording | Battery type | Notes |
| 1998 | Rio PMP300 | Flash | 32 MB + SmartMedia | No | No | No | No | AA | |
| 1999 | Rio 500 | Flash | 64 MB + SmartMedia | Yes | No | No | No | AA | |
| 2000 | Rio 600 | Flash | 64 MB + SmartMedia | Yes | Yes | No | No | AA | |
| 2000 | Rio 800 (incl. 800 Extreme) | Flash | 128/256 MB + SmartMedia | Yes | Yes | No | Yes | Li-ion | |
| 2001 | Rio One | Flash | 32 MB + SmartMedia | No | Yes | No | No | AA | Silver PMP300 design with updated internals |
| 2002 | Rio 900 | Flash | 192 MB + SmartMedia | Yes | Yes | No | No | Li-ion | Stripped down Rio 800 |
| 2002 | Rio S10 | Flash | 64 MB + MMC | Yes | Yes | No | No | AA | |
| 2002 | Rio S50 | Flash | 128 MB + MMC | Yes | Yes | Yes | No | AA | |
| 2002 | Rio S30S | Flash | 64 MB + MMC | Yes | Yes | Yes | No | AAA | Sports-oriented |
| 2002 | Rio S35S | Flash | 128 MB + MMC | Yes | Yes | Yes | No | AAA | Sports-oriented |
| 2002 | Rio Riot | Hard disk | 20 GB | Yes | Yes | Yes | No | Li-ion | |
| 2003 | Rio Fuse | Flash | 128 MB | Yes | Yes | No | No | AAA | Keychain style |
| 2003 | Rio Cali (Sport) | Flash | 128/256 MB + MMC/SD | Yes | Yes | Yes | No | AAA | Successors to the S series |
| 2003 | Rio Chiba | Flash | 128/256 MB + MMC/SD | Yes | Yes | Yes | No | AAA | Successors to the S series |
| 2003 | Rio Nitrus (incl. Nitrus-S) | Hard disk | 1.5 GB | Yes | Yes | No | No | Li-ion | |
| 2003 | Rio Karma | Hard disk | 20 GB | Yes | Yes | No | No | Li-ion | Also supports Ogg Vorbis and FLAC playback |
| 2004 | Rio Carbon (inc. Carbon Pearl) | Hard disk | 4 GB | Yes | Yes | No | Yes | Li-ion | Upgraded Nitrus with faster drive |
| 2004 | Rio ce2100/ce2110 | Hard disk | 2.5 GB | Yes | Yes | No | No | Li-ion | Similar to Carbon, but no microphone |
| 2004 | Rio Forge | Flash | 128/256/512 MB + MMC/SD | Yes | Yes | Yes | No | AAA | Successor to the Cali/Chiba. Also has FM radio recording. |

#### Portable CD players

* RioVolt SP50
* RioVolt SP60
* RioVolt SP65
* RioVolt SP90
* RioVolt SP100
* RioVolt SP150
* RioVolt SP250
* RioVolt SP350

#### Home audio players

* Rio HT-2030
* Rio Central (aka HSX-109)
* Rio EX-1000
* Rio Receiver

#### Car audio players

* Rio Car (aka Empeg Car)

### Rio Japan

* Rio DR30 (OEM BeatSounds EVR150)
* Rio SU10 (OEM A-MAX Technology PA30A)
* Rio SU30 (OEM i-BEAD i-BEAD100)
* Rio SU35 (OEM AVC Technology Si-100)
* Rio SU40 (OEM i-BEAD i-BEAD200)
* Rio SU70 (OEM M-CODY MX-100)
* Rio Unite 130 (OEM M-CODY MX-250)
* Rio SU15-KJ (OEM AVC Technology)
* Rio Si-200C (OEM AVC Technology)
* Rio Si-300C (OEM AVC Technology)
* Rio LIVE air
* Rio LIVE mini
* Rio LIVE gear (OEM Foster)

### Rio OEM models

* Nike PSA Play 60
* Nike PSA Play 120
* ESA S11
* Motorola M25
* Motorola M500
* Dell Digital Audio Receiver