FreeDB
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| − | [[FreeDB]][http://freedb.org] is a clone of CDDB[http://cddb.com], based on the [[GPL]] software and database made available by CDDB before they locked them up and became, frankly, proprietry pricks. |
+ | FreeDB[http://freedb.org] is a clone of CDDB[http://cddb.com], based on the [[GPL]] software and database made available by CDDB before they locked them up and became, frankly, proprietry pricks. |
| − | [[FreeDB]] is now often considered to be superior to the original CDDB in terms of quality of data, and certainly in terms of friendliness to developers. However, they are still using the original CDDB-developed method, while CDDB is moving quickly onto their own 100% proprietry CDDB2 system. (which offers much good stuff, but is sadly very proprietry). |
+ | FreeDB is now often considered to be superior to the original CDDB in terms of quality of data, and certainly in terms of friendliness to developers. However, they are still using the original CDDB-developed method, while CDDB is moving quickly onto their own 100% proprietry CDDB2 system. (which offers much good stuff, but is sadly very proprietry). |
| − | Nevertheless, the existing freedb database is a very interesting resource to look at... |
+ | Nevertheless, the existing FreeDB database is a very interesting resource to look at... |
| − | :Here is an explanation of how the [[DiscID]] is generated. |
+ | -> need to add in the stats data I compiled out of the discid's <- |
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| − | Given that freedb makes the entire database available, it's relatively easy enough to extract a list of discid's, break them down into the respective fields, and run some statistical analysis over them. |
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| − | Following are the results of this as based on the database as it existed in October2001. |
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| − | The table shows |
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| − | * Pop - the number of CD's counted for stats on the tracks on a CD, and length of CD |
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| − | * Mean - the average |
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| − | * Med - the median |
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| − | * Mode - what track count / cd length holds the record for being "most"? |
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| − | * rec - the count that mode the mode the mode... |
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| − | * St.Dev - the standard deviation about the mean |
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| − | <PRE> |
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| − | \Stats ---------- Tracks on CD ---------- ------------- Length of CD ------------- |
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| − | Genre\ Pop. Mean Med Mode(rec) St.Dev Pop. Mean Med Mode(rec) St.Dev |
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| − | ---------------------------------------------------------------------------------------------- |
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| − | Blues 18254 13.42 13 12( 2308) 5.2042 18254 3129.61 3122 2905 (18) 921.8151 |
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| − | Classical 39420 12.71 12 8 (3003) 7.0740 39419 3693.20 3778 4212 (37) 680.7465 |
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| − | Country 11457 13.74 12 10 (2869) 5.3808 11455 2674.79 2520 2402 (16) 903.2864 |
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| − | Data 2308 10.76 11 1 (400) 8.8888 2307 3206.00 3430.5 4431 ( 6) 1264.5403 |
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| − | Folk 21303 13.80 13 12 (3137) 4.9533 21302 3036.90 2973 2649 (23) 853.2145 |
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| − | Jazz 30727 11.53 11 10 (3959) 4.8772 30727 3269.34 3270 2683 (27) 775.9943 |
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| − | Misc 119584 13.15 13 12(12438) 6.8964 119578 3177.45 3280 4440(150) 1074.1188 |
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| − | Newage 14453 10.83 11 10 (1639) 5.3237 14453 3170.68 3217 4437 (19) 1023.5188 |
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| − | Reggae 4906 13.16 13 10 (625) 4.9640 4906 3053.04 3076 4440 (11) 942.4191 |
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| − | Rock 151572 12.08 12 12(16755) 5.8031 151566 2934.76 2936 4440(115) 1096.7841 |
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| − | Soundtrack 12373 15.22 14 12 (1010) 8.1135 12373 3089.63 3097 2722 (15) 996.4178 |
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| − | ---------------------------------------------------------------------------------------------- |
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| − | Total 426357 12.64 12 12(45417) 6.2549 426340 3118.85 3167 4440(359) 1032.6259 |
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| − | </pre> |
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| − | Things to be aware of: |
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| − | * The "length of CD" stats ignored any CD's longer than 5500 seconds - well beyond the legal length of a CD anyways. The "tracks on CD" stats did not ignore those CD's. This explains the discrepency between the population counts. (17 CD's out of 426357 total, less than 0.004%) |
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| − | * Many CD's exist in more than one genre in the freedb database. In fact, non-unique discid's make up 21.9% of the entire database!! (note that the above stats are available for the unique subsets of duplicate ID's and unique ID's) |
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| − | * The stats do not (and cannot) weight for the popularity of different CD's. ie, in an extreme case of CDone with 3 tracks selling a billion copies, and CDtwo with 1 track selling one copy, this method would happily say that the average track count in this two CD universe is "2 tracks"! |
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Revision as of 09:15, 16 April 2002
FreeDB[1] is a clone of CDDB[2], based on the GPL software and database made available by CDDB before they locked them up and became, frankly, proprietry pricks.
FreeDB is now often considered to be superior to the original CDDB in terms of quality of data, and certainly in terms of friendliness to developers. However, they are still using the original CDDB-developed method, while CDDB is moving quickly onto their own 100% proprietry CDDB2 system. (which offers much good stuff, but is sadly very proprietry).
Nevertheless, the existing FreeDB database is a very interesting resource to look at...
-> need to add in the stats data I compiled out of the discid's <-
