★★★★★ 99.5% 5 STARS, 54 Reviews since 2018


Sound Editing, Mixing and Design

Audio Optimization and Enhancement

Production Development and Support

Mastering and Finalization

Here to help you with excellent final sound and guaranteed outstanding services I work from my professional sound studio where I Edit, Mix, Optimize and Master Audio for Public Release, Digital Media, Mobile Applications, Music, Video and Web.

As a dedicated fully seasoned expert and specialist in enhancement and mastering I can greatly improve, develop or finalize your audio for optimal playback so you have fantastic sound.

You and your audio are fully supported with committed service from me that is centered around your needs.

Get top rated services developed over 20+ years in sound and music production by sending me message with details and I will be completely ready to assist you

Sound Engineer and Service Provider Sein Mackay at his studio


Develop your project and finalize your audio with


🔵 AUDIO ENGINEER AND POST PRODUCTION EXPERT:  Editing, Mixing, Mastering, Finalization.

🔵 ENHANCEMENT SPECIALIST:  Optimize, Balance, Fine Tune, Repair, Improve Quality.

🔵 VOICE AUDIO EXPERT:  Improve Sound Quality on Speech, Dialogue and Vocals. 

🔵 STUDIO ENGINEER Highly proficient at recording sound and transforming audio at my high tech studio.  

🔵 SOUND DESIGNER:  I produce and develop sounds by merging technical means with creative thinking. I edit, transform and create processes that make existing audio better suit its final application.

🔵 CONSULTANT & SOUND TECHNICIAN In depth support for developing and improving audio production.

🔵 MUSIC PRODUCTION AND DEVELOPMENT SPECIALIST:  Mixing, Mastering, Tune ups, Composition.

🔵 MUSICIAN & COMPOSER:  Composer and musical multi-instrumentalist (20+ instruments) focusing on Keyboards, Synths, Samplers and Wind.  30+ years studying, performing and collaborating on music. 

🔵 MUSIC PRODUCER Original music for Film, Broadcast, Marketing and Art. Rock, Pop, Funk, Jazz, Electronic, Ambient, Folk, Indy, Acoustic, Vocal Group, Irish Traditional and World Music. 

If you are ready and need

excellent final audio contact

me now to get started with

professional assistance today

Sein Mackay Mack Sound Services.jpg


47 Locations World Wide Served Remotely Since 2017

TOP RATED Upwork Freelancer

100% Job Success

Editing and Optimization:  Voice Over Cleanup

5★ Sein is amazing! Always a pleasure to deal with, and went above and beyond.

Professional sound/audio editor:  Fine Tune Sounds to Loop

5★ Sein is so professional! Our forever first choice for audio editing tasks!

Audio manipulations:  Loop Point Calculation

5★ True professional!

Audio Enhancement and Mastering:  Live Music Clips for Music Group Promo

5★ Sein did an outstanding job with enhancing our livemusic-clips. He always was way before deadline, very constructive in the process and delivered more than expected. Will hire him again, no doubt!

Audio Editing and Mastering:  Mobile Application

5★ Sein is our ultimate sound engineering ranger, audio problem solver and simply #1, would give 6/5 stars if I could!

Noise Reduction, Editing, Enhancement, Dialogue Optimization:  Phone Interview

5★ It was a pleasure working with Sein. He delivered the work on time and kept me up to date about what he was doing during every step of the process.

Audio Editing, Dialogue Optimization, Mixing, Mastering:  Webinar

5★ It was a pleasure working with Sein! I would highly recommend him!

Mixing and Mastering:  Audio for Music Group Promotional Video

5★ Once again, fantastic job. Meets high standards in a professional working environment: very productive, constructive communication, ahead of time, willing to go the extra-mile and great quality. With his pro-active attitude Sein made the job (which had a very tight deadline!) a fun process - we even had time to check several variations to get the best possible results. Highly recommended!

Audio and Dialogue Restoration:  Video Blog

5★ Sein was a joy to work with and exceeded the expectations I had for the work on my project. The audio sounded great, he was helpful and easy to communicate with. He was delightfully polite, and professional. 

Audio Editing:  Voice Over Editing and Optimization

5★ Sein went out of his way to ensure his work was the best it could be, and then some. He did everything he could to help make my project successful.

Restoration, Noise Reduction, Editing, Dialogue Optimization:  Audio For Video Seminar

5★ High quality work and an absolute pleasure to work with Sein!

Dialogue clean up and restoration:  Voice Over Optimization and Mastering for Tutorials

5★ Amazing experience. Sein is a magician, I cannot believe the results I got from the Audio clean up and restoration he carried out on my laptop mic recordings.

Audio Restoration and Enhancement:  Voice Over Archive Mastering

5★ Fantastic work and great communication. My audio sounds better than I was hoping for.

People registered at the freelancing platform Upwork  can view Sein Mackay's professional profile, portfolio and read more reviews on previous work.


6th of July 2020

58 Reviews, 99.6% = 5 STARS ★★★★★

Consistent audio is paramount for an excellent sound experience and that's what I live to deliver!