View source for Rio Receiver

{{Short description|Networked MP3 player}}
{{Infobox computing device
| name         = Rio Receiver
| aka          = Dell Digital Audio Receiver
| logo         = 
| image        = Dell Digital Audio Receiver.jpg
| caption      = A Rio Receiver as rebranded as the Dell Digital Audio Receiver
| developer    = Empeg Ltd
| manufacturer = [[SONICblue Incorporated]]
| type         = [[Home stereo]]
| release date = {{start date and age|2000}}
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| cpu          = Cirrus Logic 7212 ([[ARM architecture|ARM720T]]-based) at 74 MHz
| memory       = 1&nbsp;MB RAM
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| display      = 128×64 pixel [[Liquid-crystal display|LCD]]
| graphics     = 
| sound        = [[Stereophonic sound|Stereophonic]]
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The '''Rio Receiver''' was a [[home stereo]] developed by [[SONICblue Incorporated]] for playing [[MP3]] files stored on your computer's hard drive over an [[Ethernet]] or [[HomePNA]] network. It was later rebranded and sold by [[Dell]] as the '''Dell Digital Audio Receiver'''.

With a design derived from the existing [[Linux]]-based [[Empeg Car]], it became popular among the Linux hacking community.

The hardware consisted of a [[Cirrus Logic]] 7212 CPU ([[ARM_architecture|ARM720T]]-based) at 74 MHz, 1Mx32 (4 [[megabyte|MB]]) of [[EDO RAM]], and either 512k×16 or 256k×16 (1 MB or 0.5 MB) of [[NOR flash]] used to boot. Audio output used a [[Burr-Brown]] PCM1716 [[Digital-to-analog_converter|DAC]] that drove line outputs, the headphone jack, and a Tripath [[Switching_amplifier|class-D]] digital audio amplifier for speakers. Network connections were via either a Cirrus logic 8900A (10MBit Ethernet) or a Broadcom HomePNA 10 [[megabit|Mbit]]/s chipset; if no Ethernet link was seen at boot time, the unit tried HomePNA. The user interface was a 128×64 pixel monochrome [[Liquid-crystal display|LCD]] with an [[Electroluminescence|EL]] [[backlight]], a rotary control with a push button, several buttons and [[IR remote control]].

The unit booted via a 2.2 [[Linux kernel]] in flash which used [[DHCP]] and [[Simple_Service_Discovery_Protocol|SSDP]] to discover an [[Network File System|NFS]] server from which it loaded a new kernel.  The second kernel then mounted a root filesystem over NFS containing a small set of standard [[POSIX]] tools and an application for selecting and playing music over the network, which was served using [[HTTP]] by the '''Audio Receiver Manager''' software running on a Windows PC.  Although the music player and the Audio Receiver Manager and Broadcom HomePNA kernel driver module were proprietary software, the kernel and other tools were open source.  The two-step kernel boot process allowed rapid development of changes to the kernel allowing units to run new kernels by simply power cycling them; the use of standard protocols meant a variety of replacement software components could be developed independently.

==External links==
* [http://www.reza.net/rio/ RRR Project] - Replacement Client Application by Reza Naima
* [http://sourceforge.net/projects/rioplay/ RioPlay] - Open source project to replace the client and server side software
* [https://web.archive.org/web/20130724233509/http://empeg.org.uk/slimrio/ SlimRio] - Open source client software to interoperate with [[SlimServer]].
* [http://jreceiver.sourceforge.net/ Jreceiver] - Open source host software to interoperate with various client modules for the rio receiver.
* [http://www.myhap.org.uk/medianet.htm MediaNet] - Replacement client and server side software with FLAC, OGG and shoutcast support.
* [http://freshmeat.net/projects/yarrs/ YARRS] - Yet Another Rio Receiver Server. Unix-based, free-software replacement server.

{{Compu-hardware-stub}} 

[[Category:Digital audio players]]
[[Category:Linux-based devices]]
[[Category:Computer-related introductions in 2000]]