Mastering is the final step of audio post-production. The purpose of mastering is to balance sonic elements of a stereo mix and optimize playback across all systems and media formats. Traditionally, mastering is done using tools like equalization, compression, limiting and stereo enhancement.

3 revisions included in the price
Each next 3 revisions for $25
2-3 business days turnaround per song, or 1-day Rush Service per song ONLY after files confirmation
Five minutes song duration limit

Ensure that the mix down is not clipping, and avoid using normalization, compressor, EQ, or limiter on the master bus (master fader).
Make sure the peaks are not louder than -6db.
Export stereo wav 44.1-48 kHz 24 bit file from your DAW.
Submit your demo mix and put reference track for your song, if possible.