Mixing & Mastering Engineers, Producers & Songwriters who worked with Lipsealed
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My name is Juan Sierra and I'm a Recording and Mixing engineer from Bogotá, Colombia. I have a BA in Music with Audio Engineering emphasis from Xavierian University and an MA of Music, Science and Technology from Stanford University. I also do audio software Development so I build unique plugins for my own Mixes.
Riding waves, driving frequencies and ringing decibels. I am a professional who adapts to changes in the music industry, who understands its strengths and weaknesses, and constantly strives to create a better listening experience.
Electronic Music Composer/Founder of Planet27Music.com, which licenses exclusive instrumental hip-hop, electronic, chillout, trap, ambient, and downtempo tracks for film, television and multimedia outlets. Partners include WOA Records, Black Cloud Productions, Music Of The Sea, Music Dealers, Getty Images, Express In Music, Music Power Systems.
Grammy-nominated mastering engineer trusted by artists like Chris Brown, Zayn, Normani, FLO, and Ski Mask the Slump God. I bring clarity, punch, and depth while staying true to the mix. With a harmonic, analog-driven approach, I’ll make your music sound powerful, polished, and ready for release everywhere.
I have been mixing, mastering and producing for over 8 years. I started off mixing live sound and recording my band's music. I now make my living as a sound engineer I've worked with many different genres and spent countless hours discovering my unique sound in the studio. I focus on making the best record I can for each artist I work with.
I am a full time producer/engineer, I’ve worked for several artists in the industry such as Leandria Johnson, Offset, Wyclef Jean, Lil Baby, Raven Symone, and many others. I have a wide range of skill sets in the engineering field ranging from mixing, mastering, editing ADR, syncing audio with video, and podcasts.
Notable projects for Nick include Akon (Konvict Kulture Records), Sean Kingston (Epic Records), Chris Bosh (Daddy Jack Records), The Night Game (Interscope Records), Sam DeRosa (Monument Records) and Max Frost (Atlantic Records).
Professional yet comfortable environment to record.
Recent Successes
"Real talent here, and super pro, everything went right and perfectly."
"Simon is super pro and super efficient. he exactly caught the spirit of the track and gave a super tone to his bass that fit perfectly to the track. I recommend him and look forward to work again with him"
"Quick and immediately made me feel comfortable will all my requests and was delivered a great final product! Multiple changes later and he still wanted to make sure I was happy!"
"Again and again The Crushboys come up with killer vocals... Thank you for your amazing work..."
"Brandon is so quick with his work! He is also willing to get into the nitty-gritty of tedious re-writes to help complete a quality song for the customer. He has come through for me on projects like this several times ..."
"Exceeded High Expectations! Communicated and also sent great work to me faster then expected!!"
"Daramola is a total professional. Just finished my second project with him. Outstanding voice, and he is willing to give his best to the project. He sets the standard for what I will look for when I use other vocalists."
"Philip is amazing! He is extremely talented and is very easy to work with- a great communicator. He made my songs sound way better than I ever thought they could. He surpassed my expectations. He has an great ear ..."
"Working with Justin was great! Excellent singer and very professional made it easy to work with him."












