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MoodLogic was a software company founded in 1998 by Tom Sulzer, Christian Pirkner and Andreas Weigend, and was the first online music recommendation system. The company obtained ratings on over 1 million songs by over 50,000 distinct listeners as part of its proprietary method for modeling user preference space.

In addition to their web presence, the company created a software application that uses a central database to allow users to collaboratively profile music by mood. Each user has a certain number of "credits" they can use to identify song profiles. Credits could be obtained by either paying for them or profiling songs.

This software allowed the user to generate "mood" based playlists based on the mood of the user. The program could also mix a playlist based on a selected song. This would return a playlist with songs of similar tempo, mood, genre, etc. The software was also capable of organizing a music collection based on a "fingerprint" of the song. Moodlogic would generate this fingerprint of the song, upload it to the server and wait for a response. This process could take anywhere from a few seconds to a few minutes depending on computer power, internet connection speed and server load. Once the corrected tag information had been downloaded, the ID3 tag was updated and written to the file. This meant a user could have a collection of incorrectly tagged mp3's and the software would be able to correctly identify, tag, and even organize the songs into folders based on artist.

Despite a high profile launch, and apparently active community, the website was short-lived. The last release of the software was on November 13, 2003, with version 2.7.1. The last official traffic on the forums was in late 2004. Repeated forum posts by users after that time resulted in no response, and inquiries from subscribers ceased to be answered, although the software database seemed to continue operating.

Moodlogic was bought by All Media Guide, the company that runs, in May 2006. It is not yet clear whether All Media intends to resume development and reactivate the community. Prominent employees and consultants to the company included musicologist Dr. Robert Gjerdingen, psychologist Daniel Levitin and record producer/ co-founder Sandy Pearlman.

One of the main team members that created and developed the software was Delfin Rojas, who worked for AOL.

March, 2008. The MoodLogic site resolves to Macrovision's site with this message.

Effective March 3, 2008, Macrovision announces the end of life (EOL) of the Moodlogic music management and recommendation software. Service will be discontinued due to intensive operational and infrastructure resources are required to sustain the application. Macrovision’s efforts in music recommendation will continue through the AMG Data Services Tapestry business-to-business product.


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