Cavern QuickEQ export guide to Equalizer APO


Before making any measurements with QuickEQ, disable or remove all filters you have in Equalizer APO unless you really know what you're doing. Your config file should look something like one of the following screenshots:


Complete a measurement. If you need help with it, read the setup guide. After measurement, choose your preferred export method from the Export/import menu.

The relevant export options are:

  • Export to Equalizer APO - The preferred option, which exports a full Equalizer APO configuration, including gain, delay, EQ, and phase correction for each channel, if the related features are enabled.
  • Export as convolution EQ - The result will be the same as using Equalizer APO, but instead of EQ and gain, the impulse response that results in those settings will be exported. This can be used for other applications which can do convolution but can't import any format other than peaking EQs (peaking EQs should be avoided unless you have absolutely no other choice). The exported convolution filters' sample rate is 48 kHz. Their use requires the system sample rate to be set to the same value.
    • Use zero-delay convolution - Sacrifice perfect phase for no delay at all for convolution EQ. This is recommended, as the phase impact is very minimal. If this checkbox is not ticked, the exact delay is half the convolution length.
    • Convolution length - The length of the convolution filters in samples. Longer filters have better resolution, but practically there is no reason to go beyond 32768.
  • Export as peaking EQ - Tries to match the target EQ with peaking filters. The detail and resulting audio quality will be greatly reduced, but so is the system requirement for the EQ. This export can also be ported to most low quality equalizers that only support peaking EQs by simply copying the filter settings.
  • Export room simulation - This is not a correction, but an export of each channel's impulse response. This can be used for simulations and developer experiments, like HRTF creation.
    • Export after EQ - Corrects the frequency response of the room simulation, just like if it was measured after Cavern's correction. If disabled, the true room simulation will be exported.

Importing the QuickEQ configuration file

Add a Control/Include filter, this can load Cavern's export.

Click on this button, and search for the file you've exported.

This is how a successful import looks like:

If your result looks like the last screenshot, and the EQ appears on the analysis panel like the following, you have successfully applied the EQ on your system:

Common mistakes

  • Equalizer APO does not work with ASIO. Disable it, as its only valid use case is reducing delay in studio environments. It has absolutely no impact on sound quality.
  • Equalizer APO does not work with most commercial object-based formats or any kind of bitstreaming. You should disable bitstreaming and only use PCM output, as decoders of common media players are newer and more advanced than the ones found in AVRs anyway.
  • Include the Cavern result to the config.cfg found in Equalizer APO's folder. That is the only file it will ever use, doesn't matter what you have open.
  • If unrelated audio devices (sometimes even microphones) start misbehaving, check if Equalizer APO is limited to the output device you want to configure (use a Device filter before the configuration).
  • If the EQ is correctly applied, appears on the Analysis panel, but the system still sounds the same, open Equalizer APO's Configurator, and set up the device as SFX/EFX. This requires a restart.
    The exact option is found here: