Scars To Your Beautiful



Bad and Boujee feat. Lil Uzi Vert









Tired feat. Gavin James


Colin Leonard is an American mastering engineer.  His credits include: Alessia Cara, Justin Bieber, Jay-Z, Bryson Tiller, Echosmith, Leona Lewis, Migos, Icona Pop, Mastodon, Kimbra, Indigo Girls and Gucci Mane to name a few. Sales of albums and singles sold in the US with Colin Leonard listed in the credits as a mastering engineer total over 100 million.



When Colin first introduced me to SING Technology™, I immediately sent him one of my mixes. What I got back was just outstanding. I try to send everything I work on his way now.

Phil TanMix Engineer / Rihanna, Justin Bieber, Mariah Carey, Snoop Dogg, Usher

The song went to #1 in Argentina, Spain, Mexico and USA's Latin charts. SING Technology™ is a fresh new sound, a new mastering process that made the "Me Gustas Tanto" single from Paulina Rubio stick out on the radio for it's aggressive yet warm control over the whole range of frequencies, intensity and high levels.

Andres RecioExecutive producer and A&R for Paulina Rubio & Nelly Furtado

With Colin's SING Technology™ the dynamics are all still there, just as they were in the un-mastered mix. But at the same time, the overall volume is competitive with other songs that are "squashed" by conventional mastering techniques. I'm thrilled with the warmth and dimension Colin brings to my mixes.

Blake EisemanMixing Engineer - The Pussycat Dolls, MIMS, TLC, Beyonce

I will not go back to traditional mastering. The master maintains all of the positive mix elements including the dynamics while creating a depth and stereo image that is far superior to anything I have had mastered in the past. The vocals shine through the master with an element that I have not heard before.

Jeff TomeiProducer, Mixing Engineer - Smashing Pumpkins, Matchbox Twenty, Jackyl

Put the final sheen of "amazing" on the already-great mastering job he did on 'The Dreaded Marco' album!

Mike FroedgeDrummer, Producer, Mixing Engineer - Black Label Society, The Dreaded Marco