For Mastering Engineers
Show Clients the Difference You Make
Stop sending zip files and hoping clients hear the improvement. Upload your before and after, share a single link, and let them toggle between mix and master in real time — lossless, instant, on any device.
✨ Toggle between mix and master above
Clients Can't Hear What They Can't Compare
You spend hours getting a master right, then send a zip file and hope the client listens in the right order, on decent speakers, at matched levels. Half the time they reply 'sounds great' without really hearing the difference.
SoundToggle fixes this. One link, one player, instant A/B toggle — your client hears exactly what changed, in lossless quality, on any device.
Built for Mastering Workflows
Everything you need to share, showcase, and sell your mastering services
Lossless A/B Comparison
Let clients toggle instantly between your master and the original mix — full WAV/FLAC fidelity, zero compression artifacts.
Fast Streaming
Large masters start playing instantly via a lightweight proxy stream. Full lossless quality loads behind the scenes and swaps in seamlessly.
Portfolio & Lead Capture
Build a branded portfolio page at soundtoggle.io/u/you with a built-in contact form — so potential clients can find and hire you directly.
Share & Embed
Send a single link or embed the player on your website. Clients hear the difference without downloading files or installing anything.
Listener Analytics
Track plays, toggle counts, listener locations, devices, and referral sources — know exactly who's engaging with your work.
Professional Presentation
Share your masters via branded, embeddable players. Clients hear full-quality audio without needing file transfers or downloads.
From Upload to Client Approval in Minutes
Four steps to a better client experience
Upload Before & After
Upload your original mix and your master. Clients toggle instantly between versions to hear exactly what your mastering brings to the table.
Customize & Brand
Set your colors, labels, player layout, and crossfade. Add custom version labels like 'Mix' and 'Master.'
Share with Clients
Send a link or embed the player. Clients hear the difference immediately — on any device, any browser.
Win More Work
Your portfolio and contact form turn listeners into leads. Analytics show you who's engaging.
How Mastering Engineers Use SoundToggle
"Mastering engineers are leaving money on the table every time they send a WeTransfer link or upload to SoundCloud. Your clients can't hear the difference when the delivery format hides your work. One SoundToggle link changes everything — lossless, instant A/B, professional."
— The kind of feedback we hear every week from mastering engineers
For Mastering Engineers
Ready to Let Your Masters Speak for Themselves?
Stop sending zip files. Start sending SoundToggle links. Free plan available — no credit card required.
Get Started Free