Mechanical Rights are the most complicated rights. This rights are divided in 2 types. 1) Mechanical Rights from physical manufacture and (2) from digital downloads and streams.
1) With the manufacturing of CD's the label has to pay a fee to the PRO (or direct to the publisher USA / Latin America only) for every CD that is pressed. The PRO (or the publisher USA / Latin America only) will split and distribute this amount to all the songwriters that have written tracks on this CD.
2) Digital shops pay for every sold release 10% over the gross sale to the PRO (or direct to the publisher USA / Latin America only). The PRO (or the publisher USA / Latin America only) will split and distribute this amount to all the songwriters that have written for tracks on this release.
Example: So when iTunes sells an album for $11.99, $1.99 will be paid directly to the PRO (or direct to the publisher USA / Latin America only). This $1.99 will be split and distributed by the PRO (or the publisher USA / Latin America only) to the songwriters that have written tracks on this album.
Master royalties are the royalties an artist / songwriter receives from digital and physical sales of an album, EP or single sold on iTunes, eMusic or in a physical store. These royalties are directly distributed to the artist / songwriter, label or distributor. There is never a performance rights organization (PRO) involved in the distribution of Master royalties.
A sync license gives a user the right to use a song and sync it with a visual (TV shows, movies or some other kind of media output). Synchronization rights are funds a songwriter receives when someone licenses his song. Typically, a sync license is obtained from the music publisher.
Performing rights are royalties paid to songwriters whenever one of their songs is performed (played) in public. Performing rights are paid when a song is broadcasted on radio / television, in clubs, in restaurants, in bars - anywhere music is played in public. The royalties are also collected whenever anyone does a cover version of a song.
Other Right types are: Master use fees, prints. Master use fees are fees that will be paid for any other use of the master than: synchronization, performance rights, mechanical rights, master royalties and prints. Prints is when the music or lyrics are published as score or in words, on any kind of print (digital and physical).