Mixing & Mastering Engineers, Producers & Songwriters who worked with Jeff Williams
I am a metal bass player and graduate of Berklee College of Music. In addition to my skills with the metal genre, I am trained in upright bass performance and possess a diverse skillset. I have toured & performed extensively for years. I am a master session musician.
After living in LA and working at the American Music Awards and the GRAMMYs, I moved to London in late 2011 and back to Lisbon in 2018. Since then I have worked as a freelance engineer and producer with artists on both sides of the Atlantic and India, recording, mixing, remixing, programming, arranging, orchestrating.
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Gray Spark Audio is a state of the art recording facility which houses 4 studios with a huge live room capable of recording up to 30 musicians. We have worked with various local as well as international artists. Gray Spark Audio and our engineers have won the prestigious IRAA award for independent recording two years in a row.
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With 10+ years of experience in reggaeton, lo-fi, trap, rap, and more, I specialize in transforming ideas into professional productions. My progressive mixing system ensures flawless results, with creative feedback and a personalized approach to help you stand out. Let’s take your music to the next level—contact me today! 🚀
17 years of experience in live and recording guitar. I play electric, acoustic, and classic guitar.
I am passionate about helping artists make their music sound the best that it can be. Recording your songs is the most powerful too you'll ever have as an artist.
I have 20 year of experience as a recording artist, songwriter and a producer. Most of my work is soulful, gritty and organic roots-based music, with songs featured in films, trailers and TV shows and an Emmy nomination for my vocals.
As a touring and session guitarist, I have accumulated insurmountable experience that can add uncharted depths to your creative project.
COSMIC MUSIC FOR PSYCHONAUTS My music is a sort of inception between Jamiroquai, dark and gentle Aphex Twin songs and many more disco-soul or trap-house influences.
Recent Successes
"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..."
"Matt is phenomenal. How a drummer this pristine with performances so exquisite can be so humble and easy to work... now that is a mystery for the ages. Eric Greedy said it above. Matt is simply as good as it gets. ..."
"A great musician!! %100 recommended!! :D"
"Totally satisfied working with Alexander...very profesional creative individual...."
"Eric is awesome guy. He change my song to be great. I really appreciate to him. Thank you Eric. I want to work with you again!!!!"
"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! "
"Great guy, great producer, eager to get the job done and make his clients happy."
"Paul is very professional, prompt, and is very easy to work with. He took the time to ask specific questions about what we needed, and made it work. Above all, the quality of his musicianship was excellent, and adde..."
"Excellent - did as asked. Recommended"
"Thanks Edo! Working with you this 1st time is sure professional quality. I appreciate you for the Oomph to my tick. Im glad I can rely on your quality."
"It was amazing working with Kamber. Her vocals and piano playing captured exactly what I was looking for. She sings and plays with so much emotion and passion it brought tears to my eyes. Her musical skills are one o..."
"Mixedbymike was extremely professional, worked quickly, and gave me great results. I had a rather short deadline but he was able to work quick enough to let me reach it. After he gave back the first mix, it only too..."













