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Online Mixing & Mastering Service

Mission

At Liberty Hills Studio, we provide professional mixing and mastering to ensure your music resonates deeply with listeners. We blend analog warmth with modern clarity to bring out emotional depth that AI can't replicate.

Portfolio

Liberty Hills Studio is led by Eric Zay of Pure Records / Commercial Arts Co., Ltd. We specialize in genres such as Pop, Rock, Alternative, Shoegaze, Dream Pop, Hiphop, Trip Hop, Techno, and Ambient. Explore our sound through the links below.

Testimonials

Masuda Rikiji

Masuda Rikiji

Alternative Rock / Grunge / Hardcore / Dream Pop

Eric always works in a way that contributes to growth, and it definitely shows in the sound.
When he works, art is born—because he is a true artist.
Daichi Diez

Daichi Diez
Seattle, USA / Tokyo, Japan

Hip Hop / Trip Hop / Alternative Rock

I've worked with Eric many times, and his approach to sound always impresses me.
He doesn't just passively follow instructions—he senses the artist’s concept and theme and reflects that in the music.
With his long band experience, his detailed sense as a performer shows in the edits. When I send him a track, it comes back evolved.
In short, he's a genius with sound. A versatile guy who can handle Pop, Rock, Hip Hop, Electronic—anything.
Travis Hardman

Travis Hardman
Arizona, USA / Tokyo, Japan

Hip Hop / Chill Hop / Indie Pop / Alternative Rock

Over the years, I’ve worked with many talented musicians and producers. Eric Zay is both.
He performs, mixes, and masters with ease. His talent brings songs to their full potential.
I'm grateful for all the amazing tracks he’s produced and his expert-level mixing and mastering.
I recommend Eric at the highest level.
So (Tetsuo)

So (TETSUO)

Alternative Rock / Grunge / Techno Pop

We used to do our own mixes, but Eric's results convinced us otherwise—we now always rely on him.
His mixes add depth and space we couldn’t achieve ourselves. He reads the flow of the song and adjusts dynamics brilliantly.
It's like seeing a flat illustration come to life in 3D. Especially with '90s–'00s alternative music, his precision is amazing.
hanaemi (TETSUO)

hanaemi (TETSUO)

Alternative Rock / Grunge / Techno Pop

I’m Hanaemi from TETSUO. For our song “Our World for Two,” Eric not only mixed it but also arranged it.
He added his signature magic to the track. I trust and respect him deeply—he always delivers exactly the sound I’m aiming for.
Peter Hay (Moostone/UberTonik)

Peter Hay (Moostone/UberTonik)
Montreal, Canada / Los Angeles, USA

Alternative Rock / Electronica / Trip Hop / Techno / Spoken Words

Eric mixes like an artist, not a technician. He takes time to understand the track.
Most mixers follow a formula—Eric invests time, and that’s the difference.
It's rare to find someone with a feel for mixing. I hope he doesn’t get too busy!
His mixes are out there working for me worldwide, and people engage with the sound.
Yasu (VisualGate)

Yasu (VisualGate)

Alternative Rock / Indie Pop / Electro Rock

We asked Eric to produce two songs for VisualGate—both exceeded expectations.
He carefully listened to our abstract ideas and turned them into sound.
One of them is now our Spotify release and the opener for our video content.
His consistent handling from mix to master created a perfect audio-visual match. A trusted musical partner.

Our Story

Eric Zay at liberty hills studio

Liberty Hills Studio — Sound that resonates with hearts.

Liberty Hills Studio began with a casual conversation at a live venue.
One day, a musician listened to Eric Zay’s music and said:

“The mixing and mastering are amazing. Can I ask you to do it for me?”

That one line became the starting point of this studio.

Eric Zay himself once struggled with sound production and couldn’t reach his ideal sound. That’s why he can deeply empathize with artists who are unsure about how to polish their sound.

Mastering Samples

Hold 9 - VisualGate performed by Immortal Theory

Before (No mastered)

After (Mastered)

IMOCD - Annunaki

Before (No mastered)

After (Mastered)

UberTonik - Bien Soutenu

Before (No mastered)

After (Mastered)

Services

Mixing

Mastering

We work closely with you to match your ideal sound, including detailed revisions as needed.

Production

Who This Service Is For

Equipment

Analog Tape Machine

Tape simulation & drum bus workflow

Abbey Road TG12345 Plugin

Abbey Road Studios TG12345 tone shaping

Shadow Hills Mastering Compressor

Shadow Hills Mastering Compressor

Outboard Gear:
DANGEROUS D-BOX, APOLLO 8p x2, UNIVERSAL AUDIO 6176, Thermionic Culture Vulture, Mutronics Mutator, DBX 166A

DAW:
ProTools 12

Plugins:
Universal Audio, Fabfilter, Waves, Plugin Alliance, Eventide, Celemony and more.

How to Order

Requirements

Please prepare the following:
1. 16bit/44.1kHz or 24bit/48kHz consolidated audio files
2. BPM
3. Stereo demo or rough mix (MP3 or WAV)

Pricing

Let us hear your musical vision so we can bring it to life.

Contact

Feel free to reach out for consultations or estimates.
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