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Online Mixing Service · Warsaw / Worldwide

Mixing & Mastering

When every instrument finally finds its place

Send your stems, rough mix or old studio recording. I return a polished, release-ready track with clarity, depth and a solid low end. Based in Warsaw, working remotely with artists worldwide.

Hear a processed 30–60 second section before you decide whether to book the full mix. No card and no obligation.

300+Tracks Mixed & Mastered
10+Years Behind the Board
3–5 DaysTypical Turnaround
Serhii Lazariev, mixing and mastering engineer at SL Studio in Warsaw
Before & After

Hear the Difference

Real sessions — before and after professional mixing and mastering.

Rock

Raw Recording
Playing raw

Rap Mix

Raw Recording
Playing raw

Acoustic Pop

Raw Recording
Playing raw

Modern Country

Raw Recording
Playing raw
Services & Pricing

What's included

No preset chain and no handoff to another engineer. I work on the track personally, from the first listen to the final files.

Starting prices

Mastering only

from $39

$39 = express master through my proven chain of settings. Fully manual masters for complex tracks are priced higher.

Mixing & mastering

Up to 10 stems$89
Up to 25 stems$139
More than 25 stemsfrom $189

The exact price within each tier depends on recording quality and the amount of editing required. You receive it before the full job begins — and up to three revision rounds are included at every price.

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  • Editing and cleanup where the recording needs it
  • Balance, EQ, compression and low-end control
  • Vocal treatment, de-essing and tuning when needed
  • Automation, saturation, reverb and delay
  • Stereo mastering for streaming and digital release
  • Final WAV and MP3 files
  • Up to three revision rounds
The Process

From rough mix to final master

01

Send your track

Stems are ideal, but a rough mix, rehearsal take or old recording is enough to start.

02

Hear a free preview

I process a 30–60 second section so you can hear the direction before booking the full job.

03

The full mix begins

Once we agree on the direction and exact price, I complete the mix and mastering.

04

Review and delivery

You receive the finished track and up to three revision rounds if anything needs adjustment.

How I Approach a Mix

I spend the first ten minutes just listening. I do not touch anything. I listen for where the track feels crowded, where the low end loses control, and where the vocal wants to come forward but cannot.

It is like walking into a room where everyone is talking at once. My job is not to make someone shut up — it is to make sure everyone is heard.

I usually start with bass and drums. They are the foundation, and if the foundation shakes, no amount of decoration on top will save the track.

Once the low end settles into place, the other instruments start finding their positions naturally. It is not magic, although sometimes it looks suspiciously similar.

Pro Tip

Send stems whenever possible. No stems? Send what you have — I will tell you honestly how far the material can be taken.

Guitars, Vocals & Translation

I am a guitarist myself, so I hear quickly when a guitar was recorded well but sits badly in the mix. Sometimes it takes over the whole room. Sometimes it hides when it should be singing.

Vocals need a different kind of care. Too much processing turns them plastic; too little leaves them disconnected. I look for the point where the voice stays alive but feels as if it always belonged inside the track.

Mastering is the final translation check. I test the finished track on studio monitors, regular headphones and a phone speaker before delivery.

Pro Tip

Send two or three reference tracks. They explain the tone, space and energy you want faster than a paragraph of technical language.

FAQ

Frequently Asked Questions

Direct answers about the process, revisions and delivery.

Ideally, send separate tracks or stems for each instrument. If you only have a rough stereo mix or even a single recording, that works too. Send what you have and I will tell you what is realistically possible.

A single track usually takes 3–5 business days. Albums, EPs and projects that need extensive editing are quoted individually.

Up to three revision rounds are included. One or two is usually enough because we agree on the direction before the full mix begins.

Yes. Fresh mixing and modern mastering can improve the balance, clarity and impact of an older recording without changing the original performance.

I check every track on studio monitors, regular headphones and a phone speaker. The goal is a mix that translates reliably instead of sounding good on only one system.

Before the full mix begins, I send a free processed preview so you can hear the direction. If we continue and something still needs adjustment, up to three revision rounds are included.

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Yes. I regularly work with rehearsal takes, phone recordings, old sessions and imperfect stems. I will be honest about what can be improved and what cannot be fully repaired.

You work directly with one engineer. There is no agency, no handoff to junior staff and no large commercial studio overhead. The process stays lean without turning the work into a shortcut.

Hear what your track could become

Send your track and receive a free 30–60 second processed preview, an honest assessment and an exact price for the full job.

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