@WillyPao: ok...i think you have the first original FW on your iFP

(this one is a bit buggy)
by UMS: if you want to Play OGG Vorbis Files
less than 90kBit and record up to 128kBit/s -> use the MOD!
if you
only want to use the iFP like an USB-Stick -> the latest UMS FW should be yours

(i think it v 1.85)
Quote:
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Originally Posted by pargoff
...but where does the transfer speed limitation come from with these players? is it a software problem or hardware problem?
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you mean the transfer speed from PC to iFP? yeah...it's not really fast.
i think the iRiver Firmware controlls the Databus between PC and his Flash Memory...and there is some speed gone (because of controling the data)
[good example: connect your iFP to the PC...remove the Battery and the USB-Connection is gone...iFP must have a full Battery to transfer/read Data from it]
EDIT:
Quote:
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Originally Posted by RockBox
Iriver iFP-790 uses ISP1582 USB peripheral controller. Unlike other players to which Rockbox is being ported, this chip does not implement the protocol layer of USB communication. It has to be done in firmware.
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look here:
IriverIfp7XXSpecs
remember: by the Orig UMS FW -> recording is limited... 96kBit/s ; OGG Vorbis from 92 - 230kBit
by the MOD UMS FW -> recording up to 128kBit/s (without Problems) ; OGG Vorbis from 60 - 230kBit