Equalizer APO is a parametric equalizer for Windows. It is implemented
as an Audio Processing Object (APO) for the system effect infrastructure
introduced with Windows Vista.
- virtually unlimited number of filters
- works on any number of channels
- very low latency, which makes it suited for interactive applications
- low CPU usage
- Windows Vista or later (currently only Windows 7, 8 and 8.1 have been tested)
- Sound card driver must support APOs (this includes most onboard sound drivers)
- The application must not bypass the system effect infrastructure
(possible by using special APIs like ASIO)
Equalizer APO is best used in conjunction with Room EQ Wizard (http://www.hometheatershack.com/roomeq/), because it can read its filter text file format.
Please have a look at the Wiki (http://sourceforge.net/p/equalizerapo/wiki/) for instructions on installation and configuration.
I created an account just to review this amazing piece of software. A quick note, I had to uninstall the realtek drivers and use the default windows 8 drivers. My previous PC relied on equalization via an old SB Audigy + KxAudio driver. The setup worked fine, but the drivers never did sit quite right with Win 7 64 bit. It was problematic to Install, had many bugs including the inability to resume from hibernate or sleep. In addition it was a nightmare to apply numerous individual peak filters to a channel. When I built a new PC I decided to live with onboard audio and limited equalization to avoid the headache of running a 13 year old soundcard with Win8. Little did I know I would stumble across this software which does everything I need in a MUCH more streamlined way. I wish I found it sooner! I removed several resonances at my listening position in a few minutes with the help of RoomEQWizard and a UMM-6 microphone. Great stuff.
Made an account just to say thanks for the software. Exactly what I needed to have more customization with my USB headset. Thank you!!!
Top notch! Using Equalizer APO (32 bit) with Peace GUI. Exactly what I was looking for. Thumbs up and thanks to the developer of both these excellent projects!
Fantastic work! I use it for an active pc crossover including room correction, works beautifully. I am looking into a way to implement Linkwitz-Riley crossover filters,should be possible with IIR.
AMAZING... I use this with the Peace GUI: sourceforge.net/projects/peace-equalizer-apo-extension/ I have the Shure SE215 Earphones, I use Viper4Android on my phone for listening to music, and when I plug my earphones into my new MSI gaming laptop, I almost cried...until I found this! Here are my settings: Channel: all Preamp: -8 dB Filter 1: ON PK Fc 10 Hz Gain 14 dB Q 1.41 Filter 2: ON PK Fc 21 Hz Gain 14 dB Q 1.41 Filter 3: ON PK Fc 42 Hz Gain 10 dB Q 1.41 Filter 4: ON PK Fc 83 Hz Gain 5.5 dB Q 1.41 Filter 5: ON PK Fc 166 Hz Gain 3 dB Q 1.41 Filter 6: ON PK Fc 333 Hz Gain 1.5 dB Q 1.41 Filter 7: ON PK Fc 577 Hz Gain 2 dB Q 1.41 Filter 8: ON PK Fc 1000 Hz Gain 1 dB Q 1.41 Filter 9: ON PK Fc 2000 Hz Gain 2 dB Q 1.41 Filter 10: ON PK Fc 4000 Hz Gain 2.5 dB Q 1.41 Filter 11: ON PK Fc 8000 Hz Gain 4 dB Q 1.41 Filter 12: ON PK Fc 16000 Hz Gain 6 dB Q 1.41 Filter 13: ON PK Fc 20000 Hz Gain 6.5 dB Q 1.41 Hope that helps! So AMAZING. NOTE: Don't turn the Gains up too high or the sound will fade in and out. These settings give you incredible bass while retaining clear mids and crisp highs. Peace.