Jonas W. K.

Mastering Engineer

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89 Reviews (86 Verified)
Jonas W. K. on SoundBetter

Grammy Award-Winning, Multi-Platinum Selling (John Legend, Jhené Aiko, Tinashe, ZAYN, Blackbear, NVDES, FLETCHER. Sofi De La Torre etc.)

Hey there! I'm based in Los Angeles and ready to help you finishing up your project to a release-ready master!

I specialize in mastering. I have a unique, modern approach and a great ear for sonics that will assure each track stands out.

My studio is designed and built specifically from the ground up as a mastering studio.
With a hybrid setup based on high-end analog and digital gear, I'm able to get the best of both analog and digital worlds adding that little extra everyone's looking for.

Projects are negotiable, so feel free to reach out as much as you need to. It's key for me to help my clients to accomplish their vision and get a high quality product.

Apple Digital Masters (MFiT) Certified - The studio has been approved by Apple to provide hi-res audio files that meet its Mastered For iTunes specifications (MFiT).

I'd love to hear about your project. Click the 'Contact' button above to get in touch.

Send me a note through the contact button above.

89 Reviews - 15 Repeat Clients

Endorse Jonas W. K.
  1. Review by Doug L.
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    Super talented and easy to work with! I'll definitely be working with him again in the future! My masters sound better than I ever could've imagined.

  2. Review by Alfie C.
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    Beautiful

  3. Review by Jeremy Arnold
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    Great Mastering Engineer!

  4. Review by Mario Q.
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    I am very satisfied with the final mix that Jonas sent me. Also, he assisted me with a pre-mix report so I could refine my track prior to Jonas's work. And that gave me more confidence with the new adjustments (which were delivered very fast).

  5. Review by D-Sharp International
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    It was an amazing experience working with Jonas! He has an amazing ear. Most mastering engineers will simply master what you send them and just send it back but not Jonas. He pointed out something in my mix that needed to be fixed! So I’ll be doing much more work with him

  6. Review by daniel c.
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    Jonas was the nicest person ever. He was very patient made sure I was happy with my project.

  7. Review by Alfie C.
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    Fixed a messed up situation and made a gorgeous, smooth yet loud master for me.

  8. Review by Vincent J.
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    I’ve had the privilege of getting 2 songs mastered by Jonas. His work is amazing but it’s his humility and professionalism that really stood out!! I recommend him to anyone looking to elevate their music. And I’m definitely going to work with him again!!!

  9. Review by Wednesday
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    Omg I could cry, what Jonas did with my record is absolutely beautiful! Super professional and efficient, I think he returned the finished product in less then 12 hours.

  10. Review by Andrew
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    Jonas did great, detailed work on my master with very fast turnaround- glad I picked him!

  11. Review by URIEL F.
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    JONAS! The Man knows what he's doing! First I Really appreciate how humble this guy was and how he helped the mix of my song In which he provided a service to help my song reach the full potential and it did on the first try! He's Very knowledgeable with mixing. He then Mastered it beautifully! Really appreciate his time and quality of work! He also gave me very valuable information on Mastering which will help in the distribution process as well very much appreciated. I will be back

  12. Review by Joshua S.
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    Jonas was very professional from start to finish and super easy to work with. His mastering spoke even higher volumes and added that final touch that my tracks needed. No revisions needed. Amazing engineer!

  13. Review by JayM
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    so fast and perfect output. I hope work again with him later

  14. Review by Kelly B.
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    Great experience! Jonas was super easy to work with- the master came back quickly and with impeccable quality. Highly recommend!

  15. Review by Neil Sethi
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    Jonas immediately knew what I was looking for out of my master, and was able to work efficiently and effectively! Super solid working with him, highly recommend!

  16. Review by Clint P.
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    Jonas provided a beautiful master. I look forward to working with him again in the future. thank you!

  17. Review by Treymath
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    Jonas was extremely understanding, patient and professional throughout my entire time working with him. I spent a good amount of time looking through different engineers and decided to go with Jonas and I am amazed with how he was able to take my song to a different level. I will definitely be working with him again and advise anybody who happens to come across his profile to do yourself the favour and choose him to work on your next song!

  18. Review by Daniel M.
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    Working with Jonas was a dream - he was efficient, professional, and most importantly, delivered a freakin' amazing master. I'd recommend Jonas to anybody looking to take their song to the next level.

  19. Review by Prozack Turner
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    Very happy with the finished product. I highly recommend. I think I got my truck back in about 24 hours which was nice. Thanks again

  20. Review by Isaiah S.
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    DO YOURSELF A FAVOR AND BOOK WITH JONAS! Not only did his masters bring new life and loudness to my tracks than before, but he was also EXTREMELY accommodating, helpful, and patient! So happy I found him and looking forward to working with him again!

  21. Review by Saaid
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    Great quality , professional and highly knowledgeable regarding his craft/field. Recommended.

  22. Review by fgdsgdf
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    Really patient and professional!

  23. Review by Colin G.
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    This guy…omg. Jonas is incredible. He was so professional, understanding of my situation as a college student, and does really amazing freakin work. I would very highly recommend him to anyone and everyone.

  24. Review by Stoni G.
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    Jonas is amazing. He made my music sound so good. I feel more confident about releasing. It was delivered back quickly. I will most definitely be working with him again.

  25. Review by Jonathan B.
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    Excellent service and very professional. Jonas was very open minded and patient with me and delivered an excellent quality of work.

  26. Review by Oz G.
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    Never disappointed. Efficient, quick, and great to work with! Highly recommend.

  27. Review by Napxleon
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    Jonas absolutely killed the master for our first single. Super flexible, easy to work with, fast and great communication throughout. Instincts are dead on and really brought the song to life in a way we didn't think was possible. 1000% would recommend him and will be our go to for future releases.

  28. Review by Nasir A.
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    Super professional and excellent work. Got everything I asked for. Jonas’s mastering quality and talent are elite.

  29. Review by Tommy
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    Jonas is always helpful for whatever I need and he understands the whole music production from songwriting to mastering that is why I end up coming back to him every time!

  30. Review by Nicólas Soul
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    Jonas did a mind blowing job on the master. He was really quick as well as professional! Definitely would love to work more in the future!

  31. Review by Oz G.
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    Never disappointed with Jonas' work, the quality, and especially the mix feedback he provides. Enhances the track while simultaneously preserving all the elements!

  32. Review by Oz G.
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    My go-to mastering engineer. Great quality all-round.

  33. Review by Emma S.
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    Jonas is always great to work with-
    very quick and professional work, thank you!

  34. Review by Brian L.
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    Jonas did an incredible job at mastering my track exactly how I wanted it. I couldn't be more appreciative of his quick turnaround time and receptiveness to my vision for the song. Would definitely be working with him again in the future!

  35. Review by Aaron W.
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    Always a pleasure working with the one and only Jonas W.K! One of the best to ever do it!

  36. Review by Chan P.
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    Found my mastering engineer for the future!! Jonas is so experienced and knows what he’s doing.

  37. Review by Lo Digz
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    Jonas has become my go to provider when it comes to mastering songs. His communication, quality, and professionalism is exceptional and he repeats this each and every time. I look forward to working with him on future releases and I can't recommend his services enough!

  38. Review by Pablo G.
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    First time working with Jonas and I’m blown away. Very professional making sure I was involved in every step. I’m looking forward to working with him again very soon!

  39. Review by Aaron W.
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    Awesome experience once again!!! Very professional, great communicator with outstanding results!! Definitely earned my loyalty.

  40. Review by Collin D.
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    Jonas gave my track so much fullness and volume without compromising the feel of the track. Not to mention the quick turn around and immediate responses. Choosing Jonas is a no-brainer! Will hopefully work with him again in the future.

  41. Review by Aaron W.
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    This is my second time working with Jonas! Definitely has an ear for music and was able to bring my vision to life! Consider me a lifetime consumer.

  42. Review by tommy m.
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    jonas is a true professional. responsive and considerate. i needed a project done a small window of time and he was able to deliver.

  43. Review by Vintagemodern
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    A pleasure to work with. True professional and fantastic engineer. Love collaborating with Jonas!

  44. Review by Aaron W.
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    Great communication, quick replies, and professional quality! Jonas exceeded my expectations in every way, he even provided me with some pointers to ensure my project sounded it’s best! I’ll definitely use Jonas on future projects.

  45. Review by Moments
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    Super !!

  46. Review by Helene
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    by Helene
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    Was a pleasure working with Jonas W. K.

    Was quick to communicate and get the masters back sooner than expected, very professional and not to mention very happy with the result!

  47. Review by Ben C.
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    Very receptive to feedback and quick to respond, always available to discuss the tracks. will be back

  48. Review by Agnes O'Hara
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    Can not wait to work with Jonas again. He did the best with what he was given and completely surpassed by expectation. Great to work with, super professional and creative.

  49. Review by Vintagemodern
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    Top notch. Always a pleasure working with Jonas.

  50. Review by ZS
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    Jonas was absolutely great to work with. Fast and professional work! Thank you!

  51. Review by Nasir A.
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    Jonas is an amazing mastering engineer. Hands down the best mastering engineer I've worked with. His quality of work is excellent, super professional, and he delivered everything very fast. Highly recommend & I will be working with him for all my mastering needs moving forward!

  52. Review by Ty J.
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    by Ty J.
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    Amazing to work with. Professional & quick. Exceptional service. Will work with again.

  53. Review by _whoooo_
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    Great work

  54. Review by Joerg H.
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    Fast, Responsive, Flexible! This is my third time working with Jonas. Outstanding work ethic. I have enjoyed this relationship! Thank you again.

  55. Review by Like I.
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    JONAS IS AMAZING!!! Jonas perfected everything from the levels, to the clarity and did so while maintaining the original mix vision for the song. The song sounds SO much better now! I feel so much more confident about releasing it into the world.
    Jonas was communicative, clear and even taught me something along the way!
    I HIGHLY RECOMMEND JONAS! Thank you Jonas!

  56. Review by Vintagemodern
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    Another awesome experience with Jonas. True professional!

  57. Review by Steph Kit
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    Incredible response time, very professional work, kind and friendly. Would absolutely recommend to anyone!

  58. Review by Joerg H.
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    Top mastering quality! It sounds deep, warm and powerful. And well-balanced. I will work with him again in the future. By the way, he is a good guy!

  59. Review by Vintagemodern
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    Another awesome experience with Jonas! True professional and fantastic engineer!

  60. Review by Michelle L.
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    I am very impressed Jonas work, top quality! 100% will be back with my upcoming projects!

  61. Review by Lucky W.
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    Another great master from Jonas. He really has a remarkable ear for delivering a sonically pleasing and dynamic finished product.

  62. Review by Vintagemodern
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    Outstanding. A true pleasure to work with. Hope to work again in the future.

  63. Review by ReVeil Music
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    First time working with Jonas and it certainly was a pleasure. A genuine, professional who's turnaround was lightning speed. We will be using Jonas regularly for our masters. Highly recommend him!

  64. Review by jonathan x.
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    Super Good!! Very patient engineer.

  65. Review by Oz G.
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    Jonas is my go-to. Very professional and always knows how to give the track that boost while preserving dynamics.

  66. Review by Vintagemodern
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    Jonas W.K. is an amazing professional, communicator and engineer!

    Highly recommended!

  67. Review by Lucky W.
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    Jonas is picky and that’s a good thing. A lot of guys on here told me my song was ready for mastering, not Jonas. He challenged me to make my mix better and though it was more work, the end result was stellar. Jonas really cares about ensuring the product is quality but most importantly what you want! We did multiple revises and when I asked him to tweak something he was more than happy to. I’m am so psyched about the finished product and I will definitely work with Jonas again. He helped me

  68. Review by Emma S.
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    Jonas came back to me super quickly and the turn around is super fast- he mastered an instrumental for me as well as the main version free of charge which I really appreciated!! Everything was high quality and sounded great.

  69. Review by Kronstudios
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    Dope

  70. Review by Eric Lorenzo Rios
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    Great Sound and great guy! Very accommodating!

  71. Review by Vinsi
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    Jonas was very friendly and professional, helping me to get the level of quality I wanted.

    I will definitely work with him again.

  72. Review by Oz G.
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    Always delivers an awesome master. Highly recommend!!

  73. Review by Lo Digz
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    Jonas did an incredible job on the master of my new song! He gave detailed information on my original mix which optimized the dynamic range and clarity of the finished song. He responded quickly, was professional, and I couldn't be more pleased with the quality of his work. I will definitely be working with him again in the future!

  74. Review by Felicity A.
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    Jonas was very responsive, professional and helped me get the tone I wanted from my master. Would definitely work with him again.

  75. Review by Oz G.
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    by Oz G.
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    Love what Jonas does with my mixes and always great to work with.

  76. Review by Oz G.
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    2nd time working with Jonas. And once again, I'm more than pleased with the result and mix feedback. His attention to detail is awesome!

  77. Review by Vincent S.
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    Very understanding and tech-savvy

  78. Review by Rowen Reecks
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    Jonas was really fast and the end result was what we hoped for! Will def work again with Jonas

  79. Review by Oz G.
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    The master sounded awesome, and the feedback I got from my mix was very helpful and improved the mix a lot! Very good to work with, will be coming back. :)

  80. Review by Moments
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    It was great to work with Jonas, he's a very good listener, he's a very competent person that I recommend. I really enjoyed working with him, he made my project great! Thanks again

  81. Review by Kieran C.
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    Jonas brings out the very best elements of your track. He has a great combination of talent, skillset and creativity when it comes to production and mixing. Looking forward to working with him again, and would highly recommend him for anyone who wants to create or bring out the best of their craft.

  82. Review by Hadi R.
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    I couldn’t be happier with the end result! Just amazing!
    Thank you so much!

  83. Review by Robby H.
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    Jonas is the absolute best. Jonas took a track I had been touring with for a little while, and he completely re-imagined the mix to a whole other level. He's patient, professional, and insanely talented! He is truly the best and I highly recommend!!!!

  84. Review by cameron neilson
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    Jonas is my only choice ! My project was completed on time and with the upmost detail and precision. His creative input also helped me to push my project further than I ever imagined. His skill set and ability across many genres are priceless. Adding to his talent as a producer with further skills of the best mix and mastering l have found. I will only use Jonas moving forward for all my music needs.

  85. Review by Tommy
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    Jonas has also mastered "Look At Who I Am (BLKZEN Remix)" for me. Check out the song if you wanted to hear his work and quality!

  86. Review by Tommy
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    Jonas is the most skilled/talented/humble/hardest working/nicest guy I have ever met. He has mixed/mastered my original song "Look At Who I Am (Feat. Lu Alex) and I am going to ask him to be a part of my team and mix/master all my future songs for me. I do NOT want many people to know him because I want to keep him on my side.. lol Not going to lie he is absolutely 100 stars!

  87. Review by Holden D.
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    Jonas was super professional, amazingly helpful, and responded to all my questions with my project patiently and thoughtfully! I've worked with other mastering engineers in the past and Jonas is by far the best in every aspect. He had my project back in no time, but with no sacrifice to quality as my song sounded incredible after his mastering! Looking forward to continued success with Jonas!

  88. Review by Charlot
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    Jonas, the most kindest and unbelievable talented producer/songwriter! Jonas has written and produced songs to a pop artist that I manage. His unique, distinctive style really makes the records he creates stand out. His skills in mixing are outstanding, not to mention vocal editing! Always such a pleasure to work with him. A true gem :)

  89. Review by Bettina B.
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    Jonas has mixed many songs for me. He's a a top notch engineer who has the highest quality gear, a great ear, and a true musical sensibility which gives him a unique vantage point when mixing. He consistently delivers the highest quality and freshest sound on every record!

Interview with Jonas W. K.

  1. Q: Tell us about your studio setup.

  2. A: Amphion Two18, BaseTwo25, Hegel H30 Power Amps, Prism Sound Dream AD-2, Bricasti Design MC1, Lynx Aurora (n) 16+16, Chord Electronics Hugo TT2, iFi Pro iDSD, SPL Passeq, Chandler Curve Bender, HendyAmps Michelangelo, Maselec MDS-2, SSL The Bus+. With a hybrid setup based on high-end analog and digital gear, I'm able to get the best of both analog and digital worlds

  3. Q: How would you describe your style?

  4. A: Modern

  5. Q: Describe the most common type of work you do for your clients.

  6. A: Mastering

  7. Q: What do you like most about your job?

  8. A: I get to meet amazing new people everyday.

  9. Q: Can you share one music production tip?

  10. A: Less is more.

  11. Q: What other musicians or music production professionals inspire you?

  12. A: Everyone inspires me in some way.

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Sofi De La Torre - Flex Your Way Out Feat. Blackbear

I was the Producer, Songwriter, Mixing Engineer in this production

GenresSounds Like
  • ZAYN
  • Rihanna
  • John Legend
Gear Highlights
  • Amphion Two18
  • BaseTwo25
  • Hegel H30 Power Amps
  • Prism Sound Dream AD-2
  • Bricasti Design MC1
  • Lynx Aurora (n) 16+16
  • Chord Electronics Hugo TT2
  • iFi Pro iDSD
  • SPL Passeq
  • Chandler Curve Bender
  • HendyAmps Michelangelo
  • Maselec MDS-2
  • SSL The Bus+
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SoundBetter Deal

Discounts for batch or album mastering