First-time clients

Your first song with me, with unlimited revisions.

Three revision rounds come as standard. On your first song I take the cap off entirely, so we keep going until you would actually release it. Drop your email below and I will send you the code.

What the code does

Unlimited revisions, free, on your first record.

  • Works on any package, mixing or mastering
  • No per-revision fee, and no round limit
  • Revisions come back in 24 to 48 hours
  • Nothing expires. Use it whenever the song is ready

I am the only person who touches your record. Never an assistant, never an offshore team.

Matty Harris at the console in his Los Angeles mixing and mastering studio

Matty HarrisMixing and mastering engineer

1,000+ five-star reviews Ranked Top 1% globally for mixing & mastering Apple Digital Masters certified

Hear the difference

Before and after, in your genre.

Every track here was recorded by a real independent artist and mixed and mastered in my Los Angeles studio. Hit play, then switch between Before and After. It stays in the same spot, so you are hearing the same bar twice.

Pop — before and after Before. Rough mix, straight out of the box

Credits

490 records, and the names on them.

Muso.ai verifies credits against commercial releases, so the number is checkable rather than a claim. It ranks me in the top 1% of mixing and mastering engineers worldwide, in both disciplines, not just one. The wider total is 3,020+ songs delivered for artists in 56 countries, most of them independent records without a formal credit attached.

Cuco — Sitting In The Corner. Mixed and mastered by Matty Harris.CucoMixing / Mastering
ericdoa — fantasize. Mixed and mastered by Matty Harris.ericdoaMixing / Mastering
2Rare — Q-Pid (feat. Lil Durk). Mastered by Matty Harris.2RareMastering
Cousin Stizz — Butterfly. Mixed and mastered by Matty Harris.Cousin StizzMixing / Mastering
Carly Rae Jepsen — Bends. Mixed by Matty Harris.Carly Rae JepsenMixing
Huddy — IDC. Mixed by Matty Harris.HuddyMixing
Wrabel — wish you well. Mixed by Matty Harris.WrabelMixing
Daffy — OSH. Mastered by Matty Harris.DaffyMastering
Amaya Gloor — Can't Get Over Me. Mixed by Matty Harris.Amaya GloorMixing
Elsked — 1000 Hænder. Mixed and mastered by Matty Harris.ElskedMixing / Mastering
Leadley — Howling at the Moon. Mixed and mastered by Matty Harris.LeadleyMixing / Mastering
Jack & Jack — Losing You. Mixed and mastered by Matty Harris.Jack & JackMixing / Mastering
Still Woozy — Pool. Mastered by Matty Harris.Still WoozyMastering
Flipperachi — FA9LA. Mastered by Matty Harris.FlipperachiMastering
Sammy Adams — Driving Me Crazy. Mixed and mastered by Matty Harris.Sammy AdamsMixing / Mastering
Leikeli47 — Heard Em Say. Mixed by Matty Harris.Leikeli47Mixing
Joey Fatts — Choppa (feat. A$AP Rocky & Danny Brown). Mixed and mastered by Matty Harris.Joey FattsMixing / Mastering
Lionware — Tú y Yo. Mixed and mastered by Matty Harris.LionwareMixing / Mastering
Diana Smith — Salt Water. Mixed by Matty Harris.Diana SmithMixing
Whookilledkenny — Rich Rich. Mixed and mastered by Matty Harris.WhookilledkennyMixing / Mastering

All verified on Muso.ai.

What clients say

Rated 5.00 out of 5, by the people who paid.

Every review below is from a verified purchase. Nothing here is solicited, edited for tone, or written by anyone who did not send me a song.

Caleb K.

“Spent years working with other mixing and mastering engineers, just settling for the results. Working with Matty, I finally get that sound, on each and every track, that’s even better than what I could have envisioned myself.”
Mixing and Mastering Pro

Hunter B.

“I was a little intimidated sending my songs off for mix and master for the first time and Matty could not have made the process easier. As a returning customer, I highly recommend Matty for your next project.”
Mixing and Mastering Pro

John

“Great sounding mixes and easy, fast to work with. I’ve used a few comparable (and pricier) online mixers but keep coming back to Matty because the end result is superior.”
Mixing and Mastering Pro

Christian R.

“I’ve struggled to elevate my mixes in the mastering stage without emptying my bank account, but that’s changed since going to Matty. He not only delivers 10x over from a quality perspective, he is reliable and easy to communicate with.”
Stereo Mastering

More at Reviews.io, where the rating is 5.00 from 18 reviews.

Pricing

What it costs, before you give me anything.

No quiz, no quote, no “contact for pricing”. These are the prices. Your code makes the revisions unlimited on whichever one you pick.

Most popular

$349Pro, per song

  • Full mix and analog mastering, vocal tuning with Auto-Tune
  • Mastered master, unmastered mix, instrumental and acapella
  • Apple Digital Masters delivered by default
  • Unlimited revisions on your first song with your code
Buy now — $349

More hands-on

$449Elite, per song

  • Everything in Pro, plus deeper vocal work
  • Vocal tuning with Auto-Tune and Melodyne
  • Every deliverable: mixed stems, show mix and clean mix
  • Unlimited revisions on your first song with your code
Buy now — $449

Already mixed? Mastering only is $70 stereo or $110 stem. See mastering →

Common questions

Before you send anything.

How long does it take?

Three to five business days for a mix and master. Revisions come back in 24 to 48 hours. There is a 48-hour rush option at checkout if a release date will not move.

Does the code expire?

No. Grab it now and use it whenever the song is actually ready. That is the whole point of sending it to your inbox.

What do I send you?

Stems or a DAW session. For mastering only, a stereo WAV or AIFF at the session’s own bit depth and sample rate, peaks around -3 to -6 dBFS. Bus glue compression is fine and can stay. If you had a limiter on the master bus, send one version with it and one without, plus a screenshot of the settings.

Who actually mixes it?

Me. Every song, start to finish, in my studio in Los Angeles. It never goes to an assistant or a junior engineer. That is why I cap how many I take at once.

What if it still is not right?

Then we keep going. That is what unlimited means. Tell me in plain English, “vocal up, less reverb” is enough, and I will move it.

Get your code, then take your time.

It lands in your inbox in a minute or two and it does not expire. Send the song whenever you are ready.

Send me the code