The Sansa View is optimized for video playback. Part of its capabilities is handling the MPEG-4 video standard, more specifically, MPEG-4 Part 3. This is also referred to as MPEG-4 AAC. The View has more video “tools” in its capabilities, with a more complex chipset.
Pity, it’s this complexity that gives the View both its capabilities, and it’s quirkiness. Using the Sansa Media Converter for MPEG-4 video, we have the possibility of timing issues with the reencoded audio layer, based upon frame rate conversions. This manifests itself as audio lagging behind the video in some transfers.
To correct this timing error, I’ve found that reencoding the MPEG-2 file, then transferring as AVI to the Fuze / e200v2 helps.
Back to the audio front and AAC. The MP3 standard includes a license (Fraunhofer) on each device produced. Adding AAC involves yet another license, and overall increased price. Adding AAC would be nice, but with the available formats (MP3, OGG, WMA, FLAC) we can please the widest group of listeners. AAC is an integral part of the iPod and iTunes, and this is a separate market segment from the Sansa of course.
Audible’s enhanced format uses an integrated form of AAC as well, but this is different from simply enabling AAC for the devices’ general use.