Studio-grade EQ and compression for every sound on your Windows PC.
Atout APO integrates into Windows' audio pipeline as an Audio Processing Object (APO), giving you real-time control over everything you hear — EQ, Dynamic EQ, Compressor, Global Bypass, plus WAVEFORM, Recording, and Voice Boost. Optimized for USB and onboard (Realtek) audio devices, the setup most Windows PCs actually use.
Windows 10 / 11 · No account required · One-time purchase
Bluetooth headphones/speakers and professional audio interfaces are not supported in v1 — see requirements.
No account, no launcher
Install and go. Atout APO doesn't require sign-in, an internet account, or a heavyweight companion launcher to use.
Your audio stays local
All audio processing happens on your device — sound data is never sent anywhere. A 7-day trial and later license checks use a hashed hardware ID only; see our Privacy Policy for details.
Pro-grade DSP
Dynamic EQ that ducks automatically when it's needed, plus a precision Compressor with full Threshold/Ratio/Attack/Release control — the kind of tools mix engineers use, tuned for everyday listening.
Built for anyone who takes sound seriously
From music and film to podcasts and gaming — built to work great for anyone who takes sound seriously.
Music & audio enthusiasts
Shape tone with studio-grade EQ and compression across everything you listen to — streaming, local files, or anything else playing through Windows.
Film & video
Bring out dialogue and detail in movies and shows with precise EQ shaping and dynamic control.
Gaming
Hear directional cues and quieter details more clearly with precise EQ shaping and dynamic control — optimized for the USB and onboard (Realtek) audio most Windows PCs actually use.
Podcasts & voice
Clean up and balance spoken-word audio for podcasts, streams, or calls.
A real signal chain, not a gimmick
Dynamic EQ
Dedicated Sub and Air bands duck automatically based on your program material, taming low-end rumble or harsh highs only when they cross your threshold.
See it while you shape it
A real-time spectrum overlay sits directly on the EQ graph, so you can see exactly what's happening in your audio as you adjust every band.
Compressor
Shape dynamics with Threshold, Ratio, Attack, and Release, backed by Thresh/GR/Out metering so you always see how much gain reduction is happening.
WAVEFORM
See Wet after Atout processing against Dry before processing, as a live strip above the bottom panels.
Recording
Capture up to 10 minutes on your PC, then play, loop, and compare Dry / Wet. Unsaved clips are removed when the app closes. Saved clips appear in the Clips list.
Voice Boost
Pick your Discord or other voice-chat audio in SOURCE. When the game gets loud, Atout lifts that voice so callouts aren't buried — then eases back to normal when it's quiet.
One license, $14.99
Every feature included — 8-band EQ with real-time spectrum, Dynamic EQ, Compressor, Master with Global Bypass, Stereo Field, WAVEFORM, Recording, and Voice Boost. Tooltips in 9 languages; on-screen labels stay English. No subscription, no tiers.
View pricingReady to hear the difference?
Precision EQ and compression for every sound on your Windows PC — one-time purchase, no subscription.
Windows 10 / 11 only