Mixing & Mastering Engineers, Producers & Songwriters who worked with Martorn
Full-time metalachi style violinist
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I am a film composer, music producer, and keyboardist and have worked in projects for theater, dance, film, animation, and music. I am also experienced in sound design, mixing, arranging, and live sound. Above all, I am a sound artist, and pride myself on creating a high quality and emotive soundscape for each project I'm on.
Do you need to find that sound? You really need somebody who listens. To your Project and to what you want to say as an artist. I'll listen closely to make sure your audio sounds just right.
Big artist recordings as a Guitarist sessions and mixing. Recordings for Lukas Bloom, Pescao Vivo and others. Very open and various genres.
Need your tracks mixed, or mastered, or need video editing? send me what you've got.
I specialize in mixing and mastering rock, pop, and alternative music with depth and energy. With a keen ear for detail and a passion for powerful, polished sound, I’ll take your tracks to the next level.
Expressive acoustic & electric violin to elevate your track.I specialize in both acoustic and electric violin—let’s bring your vision to life!
Music for the rest of the world cause I remember when I didn't have a me.
Need a producer who can take your idea and turn it into a finished, release-ready track? I build hard-hitting, polished productions with strong songwriting instincts, tight arrangements, big energy, and clean modern mixes. Bring me a reference or a rough demo and I’ll elevate it into something that sounds current, competitive, and undeniable.
Recent Successes
"I've worked with several mix engineers but Sefi really stands out from the crowd and... will make your music better too!"
"Easy to work with, polite, and caught the vision of my record. This is the second engineer that I could say, knows what he is doing. God willing I will be sending him more records to mix and master for future projects."
"I worked with François Michaud at Wild Horse Studio and i liked a lot. I needed a woman singer for one song. He attended me fast, arranged the professional and recorded with high quality. I recommend! "
"Absolutely amazing singer, total pro, vocals recorded perfectly and quickly. Total gent too!"
"After Eric I won't look for another engineer. His mixes are beautiful and flawless. Not only are his skills exceptional but he is professional, polite, and prompt. Eric is also very willing to offer suggestions and..."
"His price was low and his mixing was good. It is easy to tell that Irving knows what he's doing. Thanks!"
"Mike is one of the kindest and greatest guys I've been ever worked with. Perhaps it is not only worth mentioning his amazing musical skills, but also he had the disposition for giving advise on other topics. I had ..."
"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..."
"I was very satisfied with Paul. He is very trustworthy. I will work with him again!"
"Just great! Great vocals, great communication, great timing, great understanding of all requests, great turnaround timing, great knowledge. Nothing else needed. Just perfect. Thank you so much, you made my track much ..."
"Alex did a great job and delivered the project on time. It sounds great! I finally got the sound I was looking for such a long time. Work with him and you won't be sorry!"
"Online Guitar Tracks, i.e. Lars, is a great guy to work with. Fast turnaround, dedicated, involved, very flexible, uncomplicated. Nice, clean, melodic guitar work. Not to mention that his price is a steal. Just booked..."









