IRiver ChromeX iMP-150 User Manual page 37

FAQ
Q
I can't hear the ASF file.
A
There are two kinds of ASF files, Audio and Video. The iMP-150 supports Audio
ASF file only.
Q
Is the sound better if I convert an MP3 file into WAV?
A
There are two groups of audio data, compressed and uncompressed. MP3 is a
diminished compression format in the compressed group, meaning it is not
possible to create the original audio file 100%, partly due to the fact that there are
frequencies missing. Once it is lost, there is no way to recover the lost part.
Q
What kind of media can the iMP-150 support?
A
Conventional Audio CD (8Cm, 12 Cm), CD-R, CD-RW DATA CD with MP3, ASF
and WMA
The iMP-150 also supports Mixed CD (Data Track + Audio Track), CD-Extra
(Audio Track + Data Track), Multi-session and packet writing Burnt CD.
Q
What is VBR?
A
VBR is "Variable Bit Rate". Some MP3 encoders support VBR. When enabled, the
compressor will use a bit rate that will fit the actual passage. If it is a complex part,
having much more variation in the sound, it will use a high bit rate. If there is less
variation in sound, it will use a lower bit rate. Usually, the average bit rate will not
be as high as a same-quality MP3 with CBR (Constant Bit Rate). However, there
is shortcoming that it's hard to keep track of the actual position that may not be
favorable with studying language.
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