Mixing & Mastering Engineers, Producers & Songwriters who worked with Guest Policy
Producer, mixing and mastering engineer, composer, live sound technician, multi-instrumentalist, and songwriter with 7 years of professional experience.
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With over 750 million streams, worked on Grammy Nominated Projects, Omah Lay's Engineer and Vocal Producer, Genre-versatile engineer and producer Damjan Blažun cherishes creativity and uniqueness. Worked in almost every field of audio and a lot of genres brings his unique style to your records.
Format-aware mixing & mastering for streaming, CD and vinyl. I deliver professional mixes and masters that translate reliably across platforms and playback systems. As an active recording artist (The Happiness & Derek Clegg), my releases are played worldwide on streaming platforms and radio.
I'm a session Guitarist, loving my acoustic Guitar, but also playing electric and western. I'm teaching guitar and are free for all projects. I'm classicaly trained, but playing everything between classic, folk and hard rock, recording at home studio.
Mixing and mastering
Songwriter, Topliner and Recording Artist specialized in Reggaeton, R&B, Trap and Afrobeat.
Professional Bass Guitarist | Metal, Rock & Heavy Styles | Fast Turnaround
Your project deserves great audio — from music and podcasts to audiobooks and voiceovers, we produce polished, professional sound at every stage. Clean edits, strong mixes, and a smooth, guided process from start to finish.
You need bass that feels right, locks perfectly, and shows up ready for the mix. I’m Carlos Mena, a NYC-based session bassist delivering electric and upright bass for film, TV, video games, and recording projects—on time, in tune, and production-ready.
Recent Successes
"Natalie Major delivered recorded vocals, as promised, within the time frame that she said she would. Fantastic voice, excellent recording quality, and an extremely reasonable price. I'm looking forward to working with..."
"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..."
"I am very demanding of myself, I like a very well done, it takes a lot of discipline against me but also against people with whom I work. Working with Mike was a great experience. One of the things that I enjoyed a ..."
"if you ask for a very professional, quick, with great ear and great quality, this guy fit for you"
"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..."
"Alex Mixed & Mastered my debut E.P throughout the month of June. He was a pleasure to work with. Even when explaining my notes with sudo muso terms, you know 'a little more crunch here' type of thing, he understood. W..."
"Absolutely amazing singer, total pro, vocals recorded perfectly and quickly. Total gent too!"
"Robert is an amazing mixer. He pays attention to details and listens to suggestions. He was extremely patient and dealt with the project in a professional manner. It was a pleasure working with him and I hope our path..."
"Reliable and "all in time making" person. Strongly recommend - Mix Master Mike."
"Francois is a great musician, guitarist and bass performer, very creative who put his soul, his top notch technique and experience to my rock song. He also remixed and mastered the song and the result is perfect. Besi..."
"I have no complaints with what I received from Diamond Groove Services. "
"I was very satisfied with Paul. He is very trustworthy. I will work with him again!"












