A licensor is the grantor of rights under an agreement.
Electronic music became popular as a result of advances in technology (particularly the development of Musical Instrument Digital Interface, or MIDI), and has since blossomed into a bewildering variety of genres including house, techno, trance, breakbeat, hardcore, and ambient.
If you’re in the music biz, then you need good mastering before you launch your records. But, what should you look for in a good mastering engineer?