My understanding is that analysis and validation are two parts of the
same process, and are performed whether you use the server or the
headless web interface.  First of all, MusicIP does an analysis of the
track, then it check to see if the fingerprint created during the
analysis process is already in the MIP database (accessed over the
internet). If there is, it applies the database info to the track. If
not, it generates a more detailed fingerprint (that's when you see the
"validating" bit if you are using the application interface and that's
what takes the most time). 

>From the MIP Help pages (thanks to the WayBack Machine):

Musicip Help Wrote: 
> What does it mean when MusicIP Mixer is validating my digital music
> collection? How long does it usually take?
> Validation checks to see if our server already has info on that
> particular song. If the song has been analyzed before, it can be
> validated. If the song has never been analyzed, then analysis is sent to
> the server.
> 
> Validation speed depends on your processor speed and the overlap
> between your personal music library and our master database. If the song
> is a part of our master database, it will only need to be fingerprinted,
> which should take approximately 2-3 seconds per song. If the song is not
> a part of our master database, it will need to be fully analyzed, which
> is more like 80% of the song's length.
> 
> How long should the analysis take?
> All answers depend on available CPU and memory, but in general,
> fingerprinting will take between 5 and 10 seconds per song, and analysis
> will take approximately 80% of the song's playing time.
> 
> Note: If the central server already has an analysis stored for your
> songs, you only have to wait for the fingerprinting. Similarly, any
> analysis performed by your machine will be uploaded to the central
> server for others to use. 

HTH


-- 
Siduhe

Who am I on 'LAST.FM' (http://www.last.fm/user/siduhe)?
"-Siduhe Loved Tracks radio got the thumbs up. Feedback included: yeah,
it's good... got the odd dodgy track tho...-" (c) 'ModelCitizen'
(http://www.last.fm/user/Modelcitizen)
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