Mixing & Mastering Engineers, Producers & Songwriters who worked with Black Koi
• Modern and Punchy is the motto over here •
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Alfredo Marz | Award-Winning Music Producer & Mixing Engineer Hi, I’m Alfredo Marz, a producer and mixing engineer with 6+ years of experience from Buenos Aires, Argentina. My work has surpassed 100M streams, earned a Premio Gardel (2024), and includes Platinum-certified productions.
I record several bagpipes, accordion, and other folk instruments for Metal bands as well as folk, cinematic, and contemporary music projects. Alongside touring worldwide with Skiltron and Boisson Divine, I’m also a music teacher with a strong background in Celtic and Occitan traditional music.
90s-rooted, wall-of-sound guitar production for the Deftones / Smashing Pumpkins / My Bloody Valentine crowd — written, tracked, and mixed under one roof. Detuned heaviness, melodic hooks buried in noise, guitars layered thick enough to feel physical. I write, produce, and mix everything myself, from first riff to final bounce, in my own studio.
I specialize in Trap, Psychedelic Mixing Effects, Hip-Hop/Rap, Vocal Comping, and RnB. Looking to work with experimental artists on a budget.
I am a singer, songwriter, producer, sound engineer, and artist. I play guitar and piano and have over 6 years of experience creating my own music. I was first self taught but now study Recorded Music at NYU.
Steezy Label Ent
I'm a producer and songwriter based in Naarm. Happy to work on demos or final mixes, touch ups, remixes.
Recent Successes
"Ben was great to work with. Great communication and finished the job in a short amount of time. His kit sounds great and I definitely plan to work with him again in the future!"
"Total pro in all areas. He plays like one and also collaborates like one in order to get the tracks you need in order to make your music better. I plan on telling every musician I know what he can provide to any styl..."
"Good person! I love him!"
"Excellent and quick work. Love working with Larry."
"I found Darrel very easy to work with and he did as he said and worked quick. I failed to tell him exactly what I was looking for before he recored the first take After the delivered, I told him that it wasn't what ..."
"It was an amazing experience working with Austin. The soundtrack sounded just like I wanted. Would love to work again in the future."
"Zach was great to work with ! Would work with him again in a heartbeat. He is very talented .. "
"Giuliano is easy to work with and a true professional, love his work and the orchestral arrangement he has provided really livened my song"
"Very quick turn around, great communication and she blessed me with some dope vibes. Thanks Lex!"
"Always a great pleasure in working with Stefano. "









