BetaNow open to everyone — free to try

Hear it together.

Drop your stems. Click anywhere on the waveform. Leave feedback pinned to the exact moment — and watch your collaborators reply in real time.

Midnight Drive — v3
4 stems · 3 collaborators live
MJAK
0:003:48
M
Maya· 0:36
kick's a touch loud here
J
Jordan· 1:36
love this transition 🔥
A
Ali· 2:31
vocal needs +2dB from here
K
Kai· 3:16
tighten the snare

Feedback on music was stuck in group chats and voice notes. So we pinned it to the sound.

See it in action.

A quick look at dropping a stem and leaving feedback right on the waveform.

Timestamped feedback

Comment exactly where it matters.

Click anywhere on the waveform and drop a note pinned to that millisecond. No more “around the 2-minute mark” — your collaborators land on the exact moment you mean.

Real-time sessions

Everyone in the room, wherever they are.

See who's listening, watch notes appear live, and reply as the ideas land. STEMR keeps the whole session in sync — like you're all at the same desk.

Built for real projects

Drop stems the size of your session.

Up to 2GB per stem, streamed straight to the cloud — no waiting, no compression, no “can you re-send that WAV.” Your full-quality files, ready to play in seconds.

Versions that make sense

Every revision, in order.

Group stems into projects and revisions so the latest bounce is always obvious. Feedback stays attached to the take it was about — nothing gets lost between v3 and v4.

Three steps to a finished track.

01

Drop your stems

Upload a mix, a bounce, or the full stem set. It's playable the moment it lands.

02

Click the waveform

Leave a timestamped note exactly where the moment happens.

03

Finish it together

Collaborators reply in real time until the track is done.

0GB
per stem, full quality
0%
of your feedback, timestamped
0ms
of “which part again?”
0
place your whole session lives

Ready to hear it together?

Start a project, drop your first stem, and invite the people whose ears you trust.