Spectra equalizer, the Windows program
Search results for “spectra equalizer” often show hardware units and other apps. This page is the Spectra EQ download for a PC. Spectra Equalizer by Stackdrop is spectrum equalizer software: you see the sound and you shape it.
- Free equalizer for Windows 10 and Windows 11. Download SpectraEQ.exe. No account.
- System-wide equalizer. After Equalizer APO is installed, Spectra EQ changes speakers and headphones for YouTube, Spotify, games, and other playback.
- 10-band graphic equalizer. Bands run from 20 Hz to 10 kHz, with bass boost, treble, vocal, rock, and the other presets.
- Live spectrum. The window draws what is playing while you move the EQ.
- PC bass booster and headphone EQ. The same knobs work for desktop speakers and headphones once that output is selected in Equalizer APO.
This is not the Spectra Sound hardware graphic EQ, not the Spectra 1964 studio equalizer, and not a Mac equalizer. If you want a Windows equalizer you can download and run, use Spectra EQ.
What Spectra EQ does
Spectra EQ is Stackdrop’s desktop equalizer. The top of the window is a live spectrum of what is playing. The bottom is a 10-band EQ from 20 Hz through 10 kHz, plus preamp and master. Each band has a knob and a slider. Hover any control for a tooltip. Scroll for 1 dB. Right-click a band to set it back to 0.
- Presets for Flat, Bass Boost, Treble, V-Shape, Vocal, Electronic, Rock, Classical, Podcast, Cinema, Night, and Loudness
- System-wide EQ after you install Equalizer APO once and reboot
- Runs locally. No account. No ads.
Make it change all sound
- Download Spectra EQ and Equalizer APO. Open Spectra. The spectrum should move when music plays.
- Install Equalizer APO, tick your Speakers, and reboot. Windows has to install it separately. It does not come inside Spectra EQ.
- Open Spectra EQ again, press EQ ON, and move a slider. YouTube, games, and other playback follow the curve.
- Press EQ OFF to return the sound to flat.
Equalizer APO is the Windows audio effect. Download Equalizer APO (official 1.4.2, 64-bit), install it, tick Speakers, and reboot. The driver cannot be hidden inside Spectra itself.
Build it yourself
The source download includes Eq.py and build_exe.bat. On Windows, put them in the same folder and run build_exe.bat. The window title should say 2.6.19-size. Replace SpectraEQ.exe in the equalizer folder so the download button serves the new build. Equalizer APO stays a separate download.