André Castro Mastering – Professional Music Mastering

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Mastering is the final step before your music is released out into the world - so you need to be sure that your songs sound their absolute best. With my finely tuned ears, an acoustically optimized room, top-tier reference speakers, and a carefully curated selection of high-end analog and digital gear, I’ll bring out the clarity, definition, and impact that your music deserves. My goal is to make sure your tracks not only sound incredible but translate flawlessly across all systems and listening environments. Your music. Sounding just like you imagined it.

Streaming

Your music deserves to sound its best on every platform, and I’ll make sure it does. Your masters will be optimized to meet the requirements of all major streaming services—Spotify, Apple Music, Tidal, YouTube, and more. No matter where your audience listens, your music will playback as expected.

CD

If you're releasing your music on CD, I’ve got you covered. I’ll handle everything—from sequencing, fades, and spacing to embedding CD-Text, EAN/ISRC codes. You’ll receive a fully verified, high-quality DDP master file, ready for professional CD manufacturing. Every detail will be taken care of to ensure your final product sounds polished, professional, and exactly as you envisioned.

Vinyl

Mastering for vinyl requires special attention, and I’ll make sure your music is perfectly prepared for the best possible cut. From optimizing dynamics to ensuring smooth translation to wax, I’ll fine-tune your tracks so they end up sounding great on vinyl delivering an incredible listening experience on every turntable.

About Me

André Castro

Mastering Engineer

I have over 30 years of experience working with digital and analog audio — and now running over a decade of full-time dedication to professional music mastering. During this period, I’ve had the privilege of working with incredibly talented artists from all around the world, successfully helping them bring their music to life.

I bring a deep passion for sound and a meticulous approach to every project. My commitment is to work with you towards delivering the best possible presentation of your music.

Your music will be mastered in a way that is respectful to both the artistic vision and the mixers intent. I am not interested in doing a rushed and careless job. I take my time, team up with you, and together we will fine-tune every detail to achieve a final product that truly represents your sound. Let’s work together to make your music shine!

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Studio

Your music will be mastered in a carefully designed acoustic environment, paired with an outstanding full-range reference monitoring system. The studio provides a revealing and neutral experience, allowing me to listen deep into the fine details of your music. I work with a carefully selected blend of high-end analog and digital processors, giving me the flexibility to choose the best tools for each song.

Interfaces & Conversion

Merging Technologies Anubis

Monitoring

Trident Acoustics M3 Speakers

PSI Audio AVAA C20

Audeze LCD-5

Routing

TK Audio The Blender

Analogue Processing

WesAudio ngTube EQ

TK Audio TK-Lizer Mastering EQ

Bettermaker Mastering EQ

Carnaby Audio HE-2 EQ

Bettermaker Mastering Compressor

Foote Control Systems P3S ME

Compressor

Gyraf G22 Vari-Mu Tube Compressor

Gyraf G21 Magneto-Dynamic

Infundibulum

Digital Processing

UAD, PA, DMG, Nugen, Tokyo Dawn,

Tone Projects, etc

Digital Audio Workstations

Reaper 7

Wavelab Pro 12

Izotope RX 11

Ableton 12

Computers

Apple MacBookPro M1 Pro

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THE ARTISTS

I'm blessed to be able to work with some amazing talent

Aaron Parks - Miguel Angelo - Cabra - Buppy - Eleanor Kingston - Mia Martina - Diego Miranda - MC Cabelinho - Mansa - Stretch Panic - William Hooker Lamb - Artsupli - Cedriss - TINK! - M.D.A. - Darrel Hughes & The Rowdy Crowd - Kjetil Alisøy - Jenee Fleenor - Michel Rostaing - Peter Friedrich - Johan Kyle - Blaq Dogg - Obsolet - Cam James - RCB Cook & Juggernaut - Abi Natesh - Christopher Green - Neon Soho - The Carry Ons - Slope 114 - Pearl - Nichole Wagner - NOZ - Girls Like You - MPO - R.O. Shapiro - Gingi & Tom T - Jesse Javan - GeoVoc - Melilotus Music - Lakshya Bhatnagar - Vasco Ribeiro e os Clandestinos - Matthew T. Ross - Madalena Palmeirim - American Folklore - Rawlands - Ben Vogel - Kokab - Joe Drennan - Jeff Hortillosa - Youth Portal - Yaboy JDub - Sahil Peris - 8/8 Records - Izreal - ADRM - Kamano - Mexit - Analog Vinu - Samaha - Tandy Brand - Chess Brown - Davidly - MPO - Rui Maia - Da Chick - Isaac Ace - Miguel Torga - 2jack4u - Stones & Bones - Aftermidnite - Stanley Earle Ratliff - Emily Rosner - Nosson Zand - The Dream Collision - 5th Sequence - Glenjamin - Inseparable - Latz - KaySoul - Tenor Steppa - Deep Montage - Juscalava - On1 - Radikal Guru - TimeWheel Records - Femina-X - D-Ego - Sepia - 2 Stray Monkeys - MC Blenda - Earstrip - Espectro Lobo - Amore Bey - Ben C. Smith - E Dot - Jus Do - Live Bradshaw - L Pro - Maan - Korkmaz - CW Franz - Damdam - Fomanshi - Shawn Diggy - Dan Padrino - Joedan - Pippo Miller - Boostman Family - Eegun - Manveer Singh - Fibonacci - Southwick - Sean Doane - FOMP Recordings - Ben C Smith - Yung Blaza - Nevilton - Soul Quest - Stolen Cargo - Tiago Morgado - TK Stacy - Clef Nite - Madloch - Keranshar - Roots Agenda - Khwezi - Rod Williams Project - Ben Dial - Coasting Clovers - Dutchie - Chick Prix - Paths - Diatonic Family - Antireal - Snakes & Ladders - Mark Stent - Muhr - Cranefield - Francesco Altobelli - Sonny Elliot - Trem Bala - plus many more...