top of page


Sound Design and Engineering 

Sound Editing, Mixing, Mastering

Technical Support and Services

Audio Optimization and Enhancement


Develop and finalize your project


Sound Production

Support Services


Merging technical means with creative

thinking I design, process, and develop your audio for outstanding sound quality.


To make your digital audio consistent I utilize engineering methods that improve your sound so it fits its purpose at each stage of your project.

Technical Support

and Services


I provide clients with in depth remote support for improving audio production by utilizing 20+ years dedicated to Technical Support and Creative Production.


Drawing on 30 years of insight into music production I implement Sound Design, Mixing, and Mastering so your music's

sound is tuned to your taste.

Audio Post Production

and Finalization



Have your projects audio finalized

with Advanced Editing,

Sound Mixing and Mastering.


Maximize your sound quality with Audio Optimization and Enhancement services to balance and fine tune your projects digital audio.

Sound services and Technical Support

SERVICE GUARANTEE  The no1. priority is assisting you with dedicated service so that you and your project are fully supported.  If you are ready to get started with professional assistance today contact me to discuss your project details and requirements so we can begin to find the best solutions for you.


50+ Locations World Wide Served Remotely Since 2017
Mack Sound Services

TOP RATED   Remote Services


99% 5/5 STARS on 70+ Reviews

WHAT CLIENTS SAY  Séin Mackay is consistently reliable and a forward thinking problem solver with excellent communication skills, a highly skilled digital media audio specialist who is always pleasure to work with.


Professional sound/audio editor:  Fine Tune Sounds to Loop - Bending Spoons S.p.A. Milan.

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

Audio manipulations:  Loop Point Calculation - Bending Spoons S.p.A. Milan.

5★ True professional!

Audio Editing and Mastering:  Mobile Application - Bending Spoons S.p.A. Milan.

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

Audio Enhancement and Mastering:  Live Music Clips for Music Group Promo - Dom Hakios, Musician and Performer.

5★ Séin 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!

Editing and Optimization:  Voice Over Cleanup - Dustin Johnson, YouTube Video Producer.

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

Video Sound Quality Editing:  Remove Buzzing from Live Music Performance Video - Private.

5★ This guy knows what he is doing when editing video and music files! Highly recommend.

AV Production and Technical Support:  Story Telling Videos Remote Production - Chris Sneyd, Entertainer and Content Creator.

5★ Séin Mackay is a godsend.  We have worked on many projects, both professional and personal.  We collaborate on C.A.N. PROJECTS and will continue to support each other in future.  He is always reliable and has a fantastic work ethic.

Edit audio - fast forward recording:  Audio Optimization and Enhancement - OSF Global Services.

5★ This freelancer will go above and beyond for your task! He responded to all of our changes and feedbacks, was very proactive to send multiple versions from which to choose and had the availability and willingness to make changes whenever and wherever we needed. Thank you so much!

Audio Editing, Dialogue Optimization, Mixing, Mastering:  Webinar - Optimize Media.

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

Mixing and Mastering:  Audio for Music Group Promotional Video - Dom Hakios, Musician and Performer.

5★ Once again, fantastic job. Meets high standards in a professional working environment.

Audio and Dialogue Restoration:  Video Blog - Ciarán Mac Aoidh, Content Creator.

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. 

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

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.

Restoration, Noise Reduction, Editing, Dialogue Optimization:  Audio For Video Seminar - Vedic Society.

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

Audio Cleaning and Enhancement:  Clean up 5 minute audio file - Private, filmmaker and cinematographer.

5★ As always, Séin delivered! He turned around a track of interview audio that needed to be cleaned up. Fast and receptive. I would hire again.

Audio Restoration and Enhancement:  Voice Over Archive Mastering - Ciarán Mac Aoidh, Content Creator.

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

Music Mastering: Vinyl Compilation 10 Year Anniversary - Andrew Sweeny, SCOOP Foundation Founder.

5★ Highly highly recommended, a total professional and a total gent.


Audio Producer, Sound Engineer and Technician.

Rock music group The Liberty Kings EP 2009.

Brian Kelly Music Producer, Sound Engineer, Musician:

"Séin did a fantastic job recording the Liberty Kings EP we did.  The songs were recorded by Séin using his own equipment.  From start to finish Séin was adverse in engineering, producing, mixing and mastering our EP up to and beyond the high standard we wanted to help us progress.


Our biggest fan of the EP especially the track "Take It Back" was legendary Irish Musician Christy Moore, whom not only enjoyed listening to the EP, but also took an active part in helping us gain recognition with Music Insiders & Record Executives.  Christy was very praising of the sound we were able to get with a modest budget, which is entirely down to Séin’s talent, gift and work ethic."


You can listen to some of the song "Take It Back" in the MUSIC section.

Vinyl Compilation Mastering Engineer.

The SCOOP Foundation 10 year anniversary double disc vinyl compilation album, 2019.

Andrew Sweeny, Founder and Project manager at The SCOOP Foundation:

Andrew's LinkedIn Recommendation:  "Séin mastered our 10 year anniversary double disc compilation album for vinyl and it sounds superb.  The first track by The Candidates is so smooth and funky you almost fall off your couch.  Séin was an absolute joy to work with too, professional in every way and very easy going but still got the job done, and on time. Would highly recommend taking Séin on!"

Broadcast Radio Audio Editor, Mastering Engineer and Technical Support Engineer.

"The Opperman Report", award winning US radio talk show and podcast, Nov 2017 - Apr 2020.

"Producers Choice Honors FAME Award 2019 - Outstanding Radio Talk Show".

Ed Opperman, Radio Talk Show Host:

Here is what Ed had to say about Séin's work in an advert featured on the show:  "My sound man Séin Mackay has his business called MACK SOUND SERVICES .com .  What he does for me is I send him my shows and he does audio enhancements and stuff like that.  He does miracles if you see some of the stuff I send to him and how it comes back.  So get a hold of Séin at MACK SOUND SERVICES .com ." 

More info and audio is available in the RADIO section.

Consistent sound is paramount for
an excellent sound experience
Séin Mackay
Liberty Kings
bottom of page