Mixing & Mastering Engineers, Producers & Songwriters who worked with JohnnyMarr
Hello. I hold sound engineering for more than 14 years. I have worked with many artists
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I am a producer, engineer and songwriter (music and/or lyrics) with over 30 years experience in various roles within the music industry. I produced, mixed and co-wrote the 2009 Mercury Prize-winning album. I can make your tracks stand out from all the noise!
Recording studio and audio production company specializing in the creation of soundtracks: original music, music production, editing, sound design, and audio post-production for animated series, films, advertising, and digital media.
Colombian composer and keyboardist with more than 20 years of experience, more than 15 albums, Arranger for Symphony Orchestras like the Soundtrack Orchestra of the National University of Colombia and the Orchestra from the Tolima Conservatory. Has worked onstage and on productions of international artists such us Germán Villacorta, Timo Tolkki.
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Twelve Years of professionally mixing hip hop, rap, and R&B for commercial release.
Music Manager in Frameshift Music. Partner with EMW, Amadea & Pandora. In-House Composer in Argo Games Studio. Video game Composer.
I specialise in mixing and mastering for rock and alternative projects, but I have a good sense of other genres as well. I also make my own music under the name "SpectraViV"!
Multi-instrumentalist with over 1.2 million Spotify streams and a 2025 International Songwriting Competition finalist. I specialise in indie pop and alternative rock, recording expressive guitar parts, bass, synths and release-ready mixes that serve the song.
Recent Successes
"Thank You JVH Productions for the great sound and quality on my song your mix gave the music lots of justice. Keep it Blazing"
"Eric was an absolute pleasure to work with! I had a quickly approaching deadline and he delivered faster than I ever could have imagined. I'm 100% happy with the work he did mastering my song, and will be returning to..."
"Good team, good job."
"I was very fortunate to work with Andrew. We did a mixing shootout with many engineers, and his mix was one of the best among all the other mixes. He has a great sense of intuition and aesthetics, great feeling for so..."
"Music has to be mixed and mastered by a professional engineer. Sefi Carmel should be your engineer of choice, no matter what your genre is. He took extra good care of my song "When A Man Loves Another" Listen for y..."
"I worked with Leo once. I admit the first task I gave him wasn't a small one. Especially with my budget. He did the job wonderfully. I went back to him for my album and the man did it again. He is persistent, pat..."
"A great musician!! %100 recommended!! :D"
"I have no complaints with what I received from Diamond Groove Services. "
"I've worked with several mix engineers but Sefi really stands out from the crowd and... will make your music better too!"
"It was a pleasure to work with Mike. He took my song to another level! Thank you!"
"Very impressed with the level of professionalism and the priority on turning out great results that guarantee client satisfaction. Very pleasant to work with, friendly and attentive! Would certainly work with Alex Mor..."
"I was very satisfied with Paul. He is very trustworthy. I will work with him again!"









