Mixing & Mastering Engineers, Producers & Songwriters who worked with Costel Biju

Radio-ready mixing & mastering, with soul and precision. We turn great songs into unforgettable records — tailored sound, punchy dynamics, and clean detail. Unlimited revisions, flexible pricing, and real human ears behind every move. Whether you’re chasing chart hits or heartfelt indie gems, we’ll treat your track like a single. Let’s make it!

I'm going to arrange and mix your Playback. Just send me a demo and you'll get the professional instrumental.

My name is Brandon and I am a freelance Engineer based out of Toronto Canada. I specialize in Post Production for Films and TV, but my passion is music. Im a classically trained percussionist with a passion for everything from Classical to Country. Would love the opportunity to work and learn with anyone and everyone.

I'm Willie, and I'm a mixing engineer in a recording studio in Rancho Mirage.

ANALOG MASTERING Blackbird Mastering stands for Analog Mastering, experience, a keen sense of good Music and the ability to make dreams come true. The feeling of real life, freedom and maybe even breaks the rules. ...The best algorithm in the world does not make a good Master.

SUPRANO OH YEA IT LOOKS LIKE I HAVE BEEN HERE BEFORE,,,YES YES YES I HAVE BEEN HERE

Established music producer, DJ, songwriter multi-instrumentalist. Singer/rapper and beat maker.

I’m a multidisciplinary songwriter and poet whose work moves fluidly across poetry, spoken word, New Age, hip-hop, and R&B, guided by a spiritually rooted, visionary approach to sound and story.