Audio engineer celebrating with raised arms in a studio with mixing console, monitors, and headphones
For mix & mastering engineers

Better Feedback. Happier Clients.

M 2:14 Can you please turn up the vocals here?

The professional way to share mixes and collect precise, timestamped feedback. Your clients will love working with you.

Trusted by engineers for Erykah Badu, Hania Rani, Seal, They Might Be Giants, and more
What your clients experience

Your work, presented like it deserves to be

Professional listening

A clean, dedicated page for every project

No expired Dropbox links. No hunting through email for the right file. Your clients open one link, press play, and hear exactly the version they're supposed to hear.

Precision feedback

Every note pinned to the exact moment

Your clients leave timestamped comments directly on the waveform. No more "around the 2 minute mark, I think?" over WhatsApp. You know precisely what they're hearing.

Stacktune waveform with client comments pinned to exact timestamps
Confident comparisons

"Is it better?" not "is it louder?"

Send a new revision and your clients compare versions with matched loudness and auto-aligned playback. No awkward gaps, no loudness bias clouding the call.

Two mix versions compared side by side with matched loudness and auto-aligned playback
Mike Rogers
Stacktune has been a game changer for my workflow with clients.
Mike Rogers Deee-Lite / Erasure / Sinéad O'Connor / Graham Nash / They Might Be Giants
What that means for you

Less back-and-forth, more finished work

Nothing forgotten

Every comment becomes a to-do

Mark them done as you work through revisions. No more printing WhatsApp screenshots or digging through email threads to find that one note about the vocal at 2:47.

Client comments as a to-do list with completed items checked off
Full control

You set the rules of the room

Set permissions per client. Hide comments between collaborators. Gate downloads until the invoice is paid. Share a single song with a link, no account required for your client.

Ship faster

From rough mix to final master in fewer rounds

Clear feedback means you get it right faster. Less back-and-forth, fewer revision cycles. Projects move from first listen to sign-off with the rounds you'd actually want.

Project overview listing songs with versions, due dates and comment counts
Foll Recording & Production
Stacktune is a revelation. It pretty much is the only thing on the market that's anywhere near as comprehensive.
Foll Recording & Production James Leonard Hewsitson / The Woven Project / Para Alta
How it works

A clear loop, no detective work

You
Share a mix
Upload and send one link, no accounts for your client.
Client
Listen & comment
Timestamped notes pinned right on the waveform.
You
Revise & tick off
Every comment is a to-do. Upload the new version.
Client
Compare & approve
Loudness-matched A/B, then sign off or send it back.
Gijs van Klooster
Managing feedback with Stacktune has saved me so much time.
Gijs van Klooster Hania Rani / Erykah Badu / Joep Beving / Michele Bravi / Tom Trago

Finish your audio projects faster
with happier clients

Free access for 30 days. No credit card required.