A system for determining high quality musical recordings comprises a server computer which communicates with a plurality of client devices configured to execute internet radio client software which plays musical recordings. The server computer includes a registration unit for registering users; an input unit for registering, for each user, and for each musical recording of a selected group of musical recordings, a user's opinion of the musical recording. It also includes a combining unit configured to combine a user's registered opinion of each of the musical recordings with the registered opinions of other users, an input valuation unit configured to assign a valuation to the registered opinions on the basis of data from the combining unit, and a reward unit for providing a reward to one or more users on the basis of a valuation provided by the input valuation unit.