Contact COS Mastering Today!

Contact COS Mastering in Atlanta, GA to schedule a free music mastering review session. Artists can submit their final mix, ask questions, and receive feedback, usually within 24 hours. COS Mastering is located in Snellville/Atlanta and can be reached at 404-524-7757.

Upload your mix file to one of the following transfer services for a free review to larry@cosmastering.com:

WeTransfer Box

COS Mastering

Snellville, GA
Atlanta, GA
Phone: 404-524-7757
Email: larry@cosmastering.com

Our Business Hours:

Monday:
Tuesday:
Wednesday:
Thursday:
Friday:
Saturday:
Sunday:

11am to 7pm
11am to 7pm
11am to 7pm
11am to 7pm
11am to 7pm
By Appt. Only
Closed