As a PC user with a high end speaker system attached, i'm very frustrated at being completely unable to adjust audio settings to enhance my output. Spotify for PC/Desktop should include a full graphic equalizer, tone control and DSP suite for the many of us that use good quality audio hardware. This is a basic feature of most media players, even free ones, and I can't for the life of me understand why this effort hasn't been made for the desktop version when there are at least some settings in the mobile apps. . Maybe look at the developers of the stalled Winamp project for an idea?