In a Professional Studio.
By an Award-Winning Mixing and Mastering Engineer.


mixing and mastering
online mixing and mastering
mixing and mastering services

Mixing and Mastering Services


Mixing in an Acoustically Perfect Studio.

Analog Mixing

Every song that we receive is mixed in our state-of-the-art online mixing and mastering studio in Los Angeles. We have almost every plugin ever made and the best analog gear on the planet!  Combining these two worlds will give you fantastic results!


Analog Hardware and Digital Precision.

Analog Mastering studio

Both stereo and stem mastering is available. Songs are mastered with Analog Compression, Analog EQ, and top-of-the-line precision plugins. All our mixing packages include analog mastering as well.

Courses and Presets

Learn how to Mix and Master from Matty

Mixing Engineer Matty Harris

Are you interested in learning how to mix and master yourself? Want to find a way to make your demo’s sound better? Check out Matty’s mixing and mastering presets as well as courses.

How Online Mixing and Mastering Works

Professional mixing and mastering doesn’t need to be hard. Our Award-Winning Chief Engineer Matty Harris is here to help you every step of the way.

Purchase & Upload

Once you purchase an online mixing and mastering package, you’ll receive a confirmation email with an upload link.  Upload your stems, and we’ll take care of the rest. Check out our FAQ for more info on the best way to export your files.

We Mix Your Song

As soon as we receive the audio files Matty books the session to begin mixing and mastering your song. Matty will mix and master every song in our world-class designed studio. Turn around time is 5-10 business days.

You Receive the Mix

Once the mixing and mastering is complete, we will send to you for approval. You get two to three revisions to make sure you are 100% satisfied!

From Our Clients

Don’t take our word for it. Listen to what some of our clients think of Matty’s online mixing and mastering services.

Finding someone like Matty in this industry is no easy feat. Not only does he consistently bring his experience, professionalism, skills, and originality to every mix he works on, but he also takes his clients' feedback to heart and provides revisions in no time flat. My music is something so personal to me and I've always felt that I could trust Matty with this truly vulnerable aspect of being an artist. Thank you Matty for sharing your unparalleled gift of taking a song to the next level with the rest of us artists!
Matty is the consummate professional. He works tirelessly with the artists to deliver great results--and helps them to realize their musical visions.

1. Customer Service - Matty's parents taught him well because he is extremely kind, courteous, respectful, and maintains excellent communication. Also, he is very punctual as well!

2. Focused on the ARTISTS vision - More often than not, many mixers lose sight of why their services were requested and instead, shape the mix to their taste and not what the artist had in mind/intended. This isn't to say you should always dismiss the mixers input; however, the mix process should be a collaborative effort and not one-sided. Matty understands collaboration and is receptive to the artists vision!

3. The SOUND! - Though the other two mentions are important, the overall SOUND is why most hire an individual to engineer their mix. Listen to any of Matty's mixes and I know without a doubt you'll be impressed! He knows how to clean up and enhance your sound so effortlessly!

4. The PRICE! - This is where my mind is blown. Typically, someone of Matty's caliber charges WAY MORE than he's asking. When you consider his education, years of experience, client portfolio, software/hardware used, and the speed at which he delivers mixes, it's clear Matty isn't doing this just for the money. He is truly passionate about audio production and delivering his very best to the artist.

Thank you again Matty. You already know I'll be hitting you back with another track in the coming weeks! If anyone has any questions, please do not hesitate to message me! I am more than willing to answer any questions about my experience with Matty!
I had a pop song 80's matty immediately understood he made an incredible mix / master it's warm, wide, shiny. The communication was very good it's a great professional ! I recommend Matty if you want to change floors !!
Matty delivers ... he listened to everything I wanted and made it my song come to life! Great communication I will continue to work with Mix & Master my song! Make sure you tap in it he will take your music to the next level!
Matty has a deep understanding of the craft and will get exactly the sound you're looking for. Plus he's got an ear for things that will work in your mix along with going above and beyond to make it sound awesome!
Matty is an amazing sound engineer! He treats every song like his own and makes sure that you walk away proud of the product. He also has some voodoo witchcraft going on in his studio, you could never tell that my songs were made on a laptop in my dorm room. He turns a $10 recording into a million dollar studio session. He also always replies very quickly to your emails and cares a lot for his client's wishes. I wouldn't recommend anyone else.
Great sound! I am so happy to work with Matty.
This is by far my favorite person to go to get my songs mix and mastered!
Matty is so professional and patient! I recommend him if you want great quality for a great price!
Great mixer. Very high quality work at every step of the mixing and mastering process. Do yourself a favour and work with Matty, you won't regret it. Matty always gets you what you need, and takes your expectations beyond what you wanted. Top notch sound engineer.
I have never had anyone mix or master my music, so I was VERY nervous letting someone do this to songs that are important to me, but Matty and his team exceeded all of my expectations and made everything sound 1,000% better than it ever has. They were EXTREMELY kind and went above and beyond to make sure we loved how our track sounded. I HIGHLY RECOMMEND MIX AND MASTER MY SONG!!!!!
One of the best to ever do it! Mix and Master My Song is where it's at! Awesome team!!
Matty's extensive experience in the industry shows in his work. Mix and Master My Song bridges the gap between bedroom artists and major names.
Matty’s an artist’s engineer, he understands the direction of the song and brings out all of right parts while maintaining the integrity of the mix. He’s definitely my go to guy for mastering.
Deciding to work with Matty is without a doubt one of the best decisions I've made since the start of music career. Great guy, incredible production and super quick turnaround. Love this dude!
I have never before worked with a more professional studio engineer than Matty! Matty is a perfectionist that delivers his mixes at the highest quality level. Even though he has worked with some of the most successful artists in the world, he treats every client the same way. He treated us very nice and respectful from the get-go and we could tell that he wasn’t going to be satisfied until we were. We have booked Matty several times and he delivers the same high level every time. And that he is using high quality equipment is a big plus. We would highly recommend Matty Harris as your studio engineer anytime.
Matty is fantastic. We've been working together for years and he's professional, timely, and talented. His mixes always sound crisp and I've gotten positive feedback from plenty of unbiased sources. Also his pricing is very fair. My standards are high but I would 100% recommend him to others.
Incredible service and the quality is superb! The best at making your sound even better than you could hope for!
Definitely 5 stars.
I'm Portuguese so my album was composed and written in Portuguese. I was expecting some issues regarding that. But Matty dealt with it like if he was working with English written material. Amazing sound! The orchestration was complex but I can hear every single detail on each song. Amazing mixing, better mastering! And Matty is a fantastic guy with a lot of patient to endure all my requests!!! I can't recommend enough!!!

Who is the Mixing and Masterng Engineer?

Matty Harris

Matty Harris

Chief Engineer

Hi, I’m Matty, a professional mixing and mastering engineer in Los Angeles with over 15 years of experience. I’ve had the pleasure of working with artists such as Kelly ClarksonSammy AdamsLil YachtyA$AP RockyCousin StizzCam Meekins, and many more. I started this online mixing and mastering service to help artists get the same high-quality online mixing and mastering services that major label artists do. My mission is to make every client 100% happy with their song once it’s finished. Please read my client reviews and listen to my mixes below. If you have any questions, click on the chat!

Our Latest Work

Listen to some of the songs Matty Has Mixed and Mastered.

  1. Cousin Stizz Brain Freeze 1:13
  1. Kehlani Honey (Geoffro Remix) 3:33
  1. No Me Lo Dlgas por Whatsapp Nara 0:58
  1. Cam Meekins Big Joints 1:13
  1. Moonwalkin Nessly, Trilly Sammy & Iso Froyo 0:56
  1. Lil Yachty & Just Juice Bands 3:47
  1. Ya No Soy Daniela Galeano 0:57
  1. A$AP Rocky, Danny Brown & Joey Fatts Choppa 1:28
  1. Sammy Adams Helluva 1:36
  1. Decline Cloudy Nueve 0:43
  1. Zack Stiltner Good Vibes 1:35
  1. Philip Baites Georgia 1:11

Frequently Asked Questions

Why Should You Choose an Online Mixing and Mastering Services?

It is easier than ever to record, mix, and master your song in your bedroom these days. Even easier to release the song for the world to hear. However, with so many people on the same playing field now, you must find ways to separate yourself from the pack. 

Having your song professionally mixed and mastered gives you three huge advantages over the competition. 

  1. Your songs will sound more precise, louder, warmer, and have the ability to compete with other songs from major artists that were professionally mixed and mastered. 
  2. Music is supposed to be a collaborative effort. Having a trained mixing and mastering engineer work on your song can add new creative and sonic differences that you might not have thought of. These changes could be what makes or breaks your song. 
  3. The technical knowledge that is needed to deliver a professionally mastered song for distribution can take years to learn and understand. Sometimes it’s best to hand your song over to someone who knows all the details so you can spend more time on being creative. 
What is the difference between Mixing and Mastering?

Mixing is when you take all your individual tracks and blend them together using compression, EQ, reverb, delay, and a host of other effects to make it sound like one cohesive piece. This is also the time you would pitch correct and line up vocals.

Mastering is the final stage of the song making process. This is where you add the final sparkle to the mix and make sure it will stand up comparably in quality and loudness to commercially released music.

Watch the video below for a more indepth explination.

Is this the best online mixing and mastering service?

We think so. 🙂

Matty’s been mixing and mastering for over 15 years and working in recording studios across the world with some of the most talented artists in the music business. Plus with the confidence of knowing your song is getting mixed and mastered in a professional studio instead of someone’s bedroom. We feel that set’s us apart from the competition.