Professional Online Mastering Service

Crunch Studio is a recording studio in Shinagawa, Tokyo.
We accept online mastering projects from a single song, delivering a polished, release-ready sound.
We also offer CD/DDP production, track spacing for EPs and albums, stem mastering, and mix feedback.

Fully Online Workflow

Available from one song
From data transfer to delivery
Everything can be done online

Handled by an Experienced Engineer

An experienced mastering engineer
carefully understands the character of your music
and finishes each song with precision

Digital Release, CD & DDP Support

From streaming masters
to CD-ready DDP creation
In-person final adjustments available

Mastering Services Available

Mastering for
digital release

Mastering for
CD release

DDP creation

Stem
mastering

Mix
feedback

What Mastering Can Adjust

Optimized
loudness

Frequency
balance

Sound
quality

Consistency across
the full release

Spacing between
songs

Production Environment Supporting the Sound

High-End Analog Gear

We use a wide range of high-end analog equipment, including compressors, equalizers, and a summing mixer.

Clean Power Environment

All equipment runs on a stable dedicated 200V single-phase power supply.

High-Grade Monitoring

Every sound-related component, from the master clock to the monitor controller, is selected for quality.

Final Adjustment for Each Delivery Format

We support everything from digital releases on platforms such as Spotify and Apple Music to DDP creation for CD pressing, as well as spacing adjustment for EPs and albums.
We deliver masters in the most suitable format for your purpose, whether for streaming, CD, or both.

• Mana Diagram
  “Desire”
  Heavy Metal

• Natsumi
  “Nagisa”
  Singer-songwriter / Pop

• .BPM
  “Watashi, Nante, Ii Onna”
  EDM / Idol

• Mayuri Tani
  “Icing Cookie”
  Pop / Idol

• .BPM
  “Dancin' Chicken”
  EDM / Idol

• Amai Dantoudai
  “Memoire Rouge”
  Melodic / Classical-style Metal

• SAKI
  “BRIGHTNESS”
  Melodic Metal

• Gotsu Totsu Kotsu
  “Fumetsu no Tamashii - Anima Immortalis”
  Extreme Metal

• UNCHAINED
  “Illusion Or Truth”
  Hard Rock / Heavy Metal

• Mana Diagram
  “Make it Reach you”
  Heavy Metal

• Amai Dantoudai
  “Bloody Dress”
  Melodic / Classical-style Metal

• UNCHAINED
  “Deeper and Higher”
  Hard Rock / Heavy Metal

• UNCHAINED
  “ROCK THE NATION”
  Hard Rock / Heavy Metal

• Amai Dantoudai
  “Fumetsu no Hana”
  Melodic Metal

• Amai Dantoudai
  “exe♡cute”
  Melodic Metal

• Shiver of Frontier
  “Eroica”
  Melodic Metal

• Shiver of Frontier
  “Spirits Rising”
  Melodic Metal

• Shiver of Frontier
  “Faint Hope to the Reality”
  Melodic Metal

• NAKED MACHINE
  “MONOCHROME HEART”
  Heavy Metal

• NAKED MACHINE
  “VANITY OF THE WORLD”
  Heavy Metal

• Mana Diagram
  “MOONLIGHT DESIRE”
  Heavy Metal

• PUNISH
  “NO REGRETS”
  Hard Rock / Heavy Metal

• PUNISH
  “TIDE OF THE TIMES”
  Hard Rock / Heavy Metal

• PUNISH
  “THE PAIN OF ELECTRICITY”
  Hard Rock / Heavy Metal

• EXCELSIA
  “JUDGEMENT DAY”
  Melodic Metal

• GUNGIRE
  “Summer Lover”
  Heavy Rock / Loud Metal

• GUNGIRE
  “Imperfection”
  Heavy Rock / Loud Metal

• GUNGIRE
  “Trigger”
  Heavy Rock / Loud Metal

• THEO NOVA
  “nightmare”
  Heavy Rock / Loud Metal

• DEAD EYED SPIDER
  “Thrill of the City”
  Hard Rock / Heavy Metal

• Ayasa
  “GUNSHOT～memory of loved”
  Melodic Metal

• Papilio Effectus
  “Metamorphosis”
  Progressive Metal

• Papilio Effectus
  “Siren”
  Progressive Metal

• AREA51
  “Judge the JOKER”
  Melodic Metal

• THE BARRELS
  “LAST GUNS BLAZING” (MV)
  Extreme Metal

• THE BARRELS
  “LAST GUNS BLAZING” (Teaser)
  Extreme Metal

• SUPERBLOOD
  “RESISTANCE”
  Hard Rock / Heavy Metal

• .BPM
  “WONDER GIRL”
  EDM / Idol

• .BPM
  “Barrier”
  EDM / Idol

• .BPM
  “Bon ODORI”
  EDM / Idol

• .BPM
  “Boom Boom Bee”
  EDM / Idol

• .BPM
  “Dorobou Neko”
  EDM / Idol

• .BPM
  “P-KAN!!”
  EDM / Idol

• .BPM
  “Popcorn!!”
  EDM / Idol

• .BPM
  “Jealousy”
  EDM / Idol

• .BPM
  “Dancin' Chicken” (Dance Ver.)
  EDM / Idol

• .BPM
  “Bakuretsuken”
  EDM / Idol

• .BPM
  “Stalker Girl”
  EDM / Idol

• .BPM
  “Bungee Jump”
  EDM / Idol

• .BPM
  “SPiDER!!”
  EDM / Idol

• Akari Higashida
  “Goodbye Shoujo”
  Rock / Pop

• Akari Higashida
  “Yappari”
  Rock / Pop

• KISS THE WoRLD
  “RainbowLoop”
  Rock / Pop

• Kujira Ongakubu feat. Risa Risaki
  “Boku no Shinkaron”
  Pop / Idol

• Maidreamin
  “Dreamin☆Maidreamin”
  Pop / Idol

• Sunny Kubota and The Old Lucky Boys
  “Kinben de Doryokuka to Fuchou suru Petenshi”
  Rock / Pop

• Sunny Kubota and The Old Lucky Boys
  “CANDY BOX”
  Rock / Pop

• CANDY GO!GO!
  “One Chance☆Summer”
  Rock / Pop / Idol

• SHORTINO
  “Rising Sun”
  Hard Rock / Heavy Metal

• BACKDAV
  “Velonic”
  Rock

• Shinjitsu Kaigi
  “Parallel Emotion / GROLY”
  Rock

Stem mastering is a mastering process that uses separate stem files for each part or instrument group.
It allows more detailed adjustments than conventional mastering, making it possible to shape the sound more flexibly.
This is an effective option when you want to take the overall quality one step further.

Detailed Adjustment by Part

Drums, bass, guitars, vocals, and other parts can be adjusted individually with EQ and balance processing before the final master is shaped.

More Flexible Than 2-Mix Mastering

Processing that would affect the entire stereo mix can instead be focused on specific instruments when working with stems.

To get the most out of mastering, the condition of the mix is also important.
Mix Feedback is an optional service where we point out issues and areas for improvement before mastering begins.
It is recommended for anyone who wants to move into mastering with a better mix, feels unsure about their own mix, or wants an objective professional opinion.

Checked by Professional Ears

The mastering engineer objectively checks vocal and instrument balance, frequency treatment, dynamics processing, and other key elements.

Clear Improvement Suggestions

We provide a report explaining what to improve and how. This can be used for mix revisions or future productions.

Send audio data

Discuss
your requests

Payment

First master
delivery

Revision
communication

Final revisions
and delivery

The entire process can be completed online.
Unless the requests are excessive, revisions are handled without a strict limit.

What is the turnaround time?

The first master is usually delivered within 2 to 5 days. If you are in a hurry, please contact us and we will do our best to accommodate you.

Is same-day or next-day rush delivery available?

Yes. We will do our best to accommodate rush requests. Please contact us first.

How many revisions are included?

There is no strict limit unless the requests are excessive. In most cases, the process is completed within 0 to 2 rounds.

How do revision requests work?

Revision requests are usually handled by email or LINE. If you prefer to communicate by phone, please let us know.

Can I attend the final adjustment in person?

Yes. In-person final adjustments are available. Please note that separate studio charges will apply.

What is the online workflow from request to delivery?

The workflow is: data transfer, discussion of your requests, payment, first master delivery, revisions, and final delivery. The entire process can be completed online.

What are the benefits of outsourcing mastering?

With objective ears and a high-quality equipment environment, we can optimize the sound in line with your intent. It also helps ensure better compatibility with streaming platforms and loudness requirements.

Can I request mastering even if I am unsure about my mix?

Yes. Mastering works best when the mix is already in good shape. If you are unsure about your mix, Mix Feedback or Stem Mastering may help improve the final result. Please feel free to ask us.

Do you support mastering for digital releases?

Yes. We can master your music with streaming platforms such as Spotify and Apple Music in mind.

Can you create DDP files for CD pressing?

Yes. For album and EP mastering, we can create DDP files for CD pressing. We can also handle PQ editing and spacing adjustment for CD production.

Can I request mastering for just one song?

Yes. You can request mastering from one song, which is also useful if you want to check the final quality before committing to a larger project.