[KHRoN]

actually it is pointless to use iriver's "ogg converter" as what it does is to decode OGG file to PCM stream and encode it again with another "average bitrate" setting with OLD Ogg Vorbis Encoder

which is bad because:
- it is re-encoding, which means "twice as compressed, twice as much artifacts"
- file size is actually bigger than it could be (because of average bitrate ie. 100kbps instead od 98kbps)
- you can use new (providing better sound quality) encoder (say aoTuV relase 1), but you still re-encode hi-quality file with old and bulk "vorbis pre-1.0 beta" encoder

far better is to use more strict settings at the first encoding ie. "average bitrate" set to 100kbps to ensure full compatibility with iMP but sacrificing those 4kbps

the only program capable of "bitrate peeling" (say "without re-encoding" change of bitrate) is "bpeel"... but it only decreases bitrate (ie. 250 -> 220kbps for iFP series) and not increases (in terms of quality it would not be as pointless as re-encoding, but still it will be like "padding with zeroes")... and in fact is capable of reducing bitrate as far as ~0.8 times original bitrate... and - in fact - speaking of quality, it would be better to encode once more from CD-Audio than to peel some bitrate off