RioVolt SP100 Portable CD/MP3 Player with 120 Second Anti-Shock

• Plays MP3, WMA, and standard audio CDs
• Listen to CD-R and CD-RW discs with more than 10 hours of music on them
• Can be upgraded to accommodate emerging audio-compression schemes
• Includes audio management software for PCs and Macintoshes
• Includes 8-function remote control and offers repeat and shuffle modes, adjustable equalization, and programmable playlists

While the Rio Volt's predecessors combined solid sound with the ability to play MP3-encoded discs along with standard CD-Rs and CD-RWs, none of them took the extra step of including both WMA (Windows Media Audio) compatibility and ID3 tag support. The addition of these features to the MP3 CD formula makes this unit the most adaptable portable on the market, as well as one of the most convenient.

WMA is a Microsoft audio format that purports to offer MP3-quality sound from files one-half the size, potentially letting you cram up to 300 or so songs on a single disc. The format supports data transmission of 48 Kbps (near-CD quality) and 64 Kbps (CD quality).

ID3 tags are markers embedded in MP3 files that feed song, artist, and album names to your player. Supporting these tags means that a device can display this information, letting you find the song you want without having to remember exactly where on the disc a song sits. This proved an invaluable feature as we scavenged through the hundreds of WMA and MP3 files on our discs for tunes to match our ever-changing moods.

Moving through a song list is easy with the Rio Volt's up/down buttons, and a +10 button lets you jump ahead 10 tracks at a time--especially useful with fully loaded MP3 discs. The inline remote (part of the headphone cord) lets you operate most functions without having to dig the unit out of its carrying case and even offers a battery-friendly hold switch that prevents unwanted initiation of playback.

For those new to MP3, WMA, and rewritable CD formats, the Rio Volt includes Adaptec's Easy CD Creator Standard 4 (for PC--a Deluxe version is available separately) and SoundJam (for Macintosh) software packages for creating your own CDs. Of course, the burning of CDs does require a CD-recording burner, an expense that is almost inevitable if you want to keep up with the latest in audio technology.

Despite the numerous strengths of the Rio Volt, we ultimately discerned a few chinks in its technological armor. Most notably, its programming feature--which offers shuffle and repeat modes along with memory programming--lets you choose songs only by track number rather than by song name. In our testing, this forced us to check track numbers against the CD playlist on our computer several times (and we couldn't print the playlist for easy reference, because the software doesn't provide this option).

Another shortcoming of this portable is its earbud headphones--consider upgrading as soon as possible to headphones that better convey the quality of the Rio Volt's sound.

Along with the handiness of the unit's feature set, we were impressed by the rich, powerful sound of the unit and the consistency of sound quality across the various compatible formats. High-bit-rate MP3 files sounded nearly as crisp and full as standard CDs, and digitally copied CD-RWs (rewritable CDs) sounded just as good as their sources.

Five equalizer presets really make a sonic difference, especially the Jazz and Extra Bass settings. Throw in a choice of 10 or 40 seconds of extremely effective antiskip protection (the 40-second option consumes more power), and you've got the recipe for an easily customized aural treat that performs under almost any conditions. --Ed Noble

Pros:

• Compatibility with MP3/WMA, standard audio CDs, and CD-R/RWs
• Supports ID3 tags for easy search of MP3 files
• Five EQ presets that complement various musical genres
• Great sound

Cons:

• ID3 tag info not displayed when programming
• Hollow-sounding earbud headphones
• Awkward carrying case