Audio review for musicians

Where focused listening meets precise feedback.

Upload lossless audio, share it privately, and collect timestamped feedback from producers, mixing engineers, and clients -- without the email chain.

Start free See features
Currently in beta
Late Night Sessions
v3 mix 04:32
1
2
3
00:00 01:47 04:32
SM
Sarah M. 01:14 vocals
The vocals in this section feel buried -- let's try boosting the mid-range around 2-3 kHz. The sibilance is clean otherwise.
JK
James K. 02:08 – 02:22 bass
Kick and bass are fighting here. Try a sidechain or duck 60 Hz on the bass.
…
Hold F to audition another version - instantly
Features

Everything the modern ear needs to review a mix.

Share, review, and refine -- keeping every note and revision in one place, without losing track of which version someone heard.

Timestamped feedback, pinned to the waveform.

Click any moment to drop a comment. Drag across a region to scope a note to a phrase. Tag instruments, mention collaborators, or reference shared glossary terms so "more air" never gets misread again.

1
2
3
SM 01:14Vocals feel buried. Boost mids around 2-3 kHz?
JK 02:08Kick/bass clash -- sidechain the low end.
RP 03:02Love the breakdown. Ship it.

Team access, right-sized.

Invite admins and clients with separate roles and separate tokens. Share a link, control who can listen, comment, or upload. Mentions route notifications to the right person.

owner → admin → client

Interactive waveform player.

Full waveform with zoom, minimap, and region markers. Click any comment to jump to that moment.

Version history that tells a story.

Upload revisions and never lose a good take to a client changing their mind. Hold F to flip to another version in real time - hear the difference without lifting a finger off the keyboard.

v3Final mixApr 22
v2Vocal retakeApr 18
v1Rough mixApr 09

Timestamps that match your DAW.

When your exported audio doesn't start at bar one, set a per-version offset so every comment timestamp lines up exactly with your DAW session. No more mental arithmetic when jumping from a client note to your project timeline.

DAW sessionstarts at bar 1 → offset + 0:04
audio filestarts at 0:00
comment 1:14 in app = 1:14 in DAW
Workflow

From rough bounce to final print, in three moves.

No installs, no plugins -- just share a link and collect precise, versioned feedback.

01 / UPLOAD

Drop the bounce.

Upload the audio files for your project. That's it.

→rough-mix-v2.wav84 MB
72%
uploaded✓
02 / REVIEW

Collect precise notes.

Clients pin timestamped comments. Tag by instrument, priority, or listening device.

@sarahairpods
01:14boost vocal mids
02:08sidechain bass
03 / ITERATE

Revise, compare, repeat.

Upload a new version for your client to review. They compare it against the previous one, leave notes on what still needs work, and you go again - until everyone signs off.

v1rough mix4 notes
v2vocal retake2 notes
v3final mix✓
Shortcuts

Designed like a DAW, not a web form.

Every interaction that matters has a keystroke. Keep your hands where your hands already are.

Shift+Space
Toggle play/pause without leaving the comment field
Shift+← /→
Seek ±2 s — for pinpointing transients
Hold F
Flip to version B — click-free crossfade
Hold B
EQ solo sweep — bandpass across 20 Hz – 20 kHz with mouse X
⌘+Enter
Post comment from anywhere in the form
@
Mention a collaborator, instrument, or listening device
Comparison

Built different, on purpose.

Most audio review tools stop at timestamped comments. TrackBack goes further -- because a note without context is just noise.

Filepass Notetracks Samply GDrive + Email Audome TrackBack
Timestamped comments ✓ ✓ ✓ ✗ ✓ ✓
Range comments ✓ ✓ ✗ ✗ ✓ ✓
Version history ~ ✗ ✓ ~ ✓ ✓
A/B compare ✗ ✗ ✗ ✗ ✓ ✓
DAW offset support ✗ ✗ ✗ ✗ ✗ ✓
Listening device tagging ✗ ✗ ✗ ✗ ✗ ✓
Instrument tagging ✗ ✗ ✗ ✗ ✗ ✓
DAW-style keyboard shortcuts ✗ ✗ ✗ ✗ ✗ ✓
Shared audio glossary ✗ ✗ ✗ ✗ ✗ ✓

~ = limited or partial support · Based on publicly available information

Pricing

Simple pricing, no surprises.

Start free. Upgrade when you're ready. Cancel any time.

Free

Get started with a couple of projects.

$0

free forever

Get started
  • ✓ 3 projects
  • ✓ 1 GB storage
  • ✓ Unlimited client invites
  • ✓ Timestamped comments
  • ✓ A/B comparison
  • × Admin invites
Coming soon

Pro

For active audio professionals.

$8/mo

or $7.50/mo annual

  • ✓ Unlimited projects
  • ✓ 100 GB storage
  • ✓ Unlimited tracks & versions
  • ✓ Unlimited client invites
  • ✓ Timestamped comments
  • ✓ A/B comparison
  • × Admin invites
Coming soon

Studio

For studios and teams.

$18/mo

or $17/mo annual

  • ✓ Unlimited projects
  • ✓ 500 GB storage
  • ✓ Unlimited tracks & versions
  • ✓ Admin invites
  • ✓ Custom branding
  • ✓ All Pro features
Coming soon

Enterprise

Custom storage, SLA, and priority support.

Custom

 

  • ✓ Custom storage
  • ✓ All Studio features
  • ✓ Priority support
  • ✓ Custom SLA

All prices in USD · EU & Swiss VAT handled by our payment processor