Advanced Equalizer / AutoEQ


  • Your device must embed the proper system libraries (Most do, but some exotic brands may embed broken ones).
  • The equalizer is only applied when playing locally and not when casting to Chromecast or UPnP devices.
  • The equalizer offers an expert mode that gives controls over all the bands and more settings, see the end of this article.
  • On some device it might be necessary to reduce the equalizer block size if you have stuttering sounds. See [Wiki] Settings - Advanced (Advanced settings).

Settings can be accessed from Playback settings or the now playing 3 dots menu.


  • Each steps of the equalizer can be enabled or disabled by toggling the switch: image
  • You can easily reset each step by clicking the corresponding reset button: image
  • You can set precise values for each slider by pressing the value in the left column to open the configuration dialog:



Symfonium support unlimited profiles that contains all the equalizer setting. The profiles can be automatically loaded when the active sound output change. (Headphone connected, USB heaphones, specific Bluetooth headphone, speaker, …)

Press the headphone button to select what device to link to the profile.
(Do not forget to save the profile after selection, or more generally after any change).
Note: If you want the active profile to also revert when unplugging your headphone, you need to create a profile applied to the Phone device.


An audio virtualizer is a general name for an effect to spatialize audio channels. The exact behavior of this effect is dependent on the number of audio input channels and the types and number of audio output channels of the device. For example, in the case of a stereo input and stereo headphone output, a stereo widening effect is used when this effect is turned on.

The effect support 2 modes depending on your output.
Binaural for headphones and Transaural for speakers. Press the toggle button to alternate between the modes.


The equalizer embed a classic pre amp, that allows to increase or decrease the “volume”, it can be useful if you want to push some bands in the equalizer and avoid sound clipping. (The compressor and limiter can also be used for that purpose)


Symfonium embed the AutoEQ database ( & GitHub - jaakkopasanen/AutoEq: Automatic headphone equalization from frequency responses) that contains advanced 127 bands profiles tailored for your headphones.

AutoEQ is a project for equalizing headphone frequency responses automatically and it achieves this by parsing frequency response measurements and producing equalization settings which correct the headphone to a neutral sound.

See also: Use a custom AutoEQ profile


  • The embedded database ensure that there’s no possible clipping with the applied values, this often result in lower level sounds. You can apply positive preamp to compensate.
  • The engine can also import custom GraphicEQ.txt files generated by that tool.
  • This is an external project I can not add support for your headphones directly. See their website.



Classic equalizer with 5,10,15 or 31 bands in normal mode. (Any number of custom bands in expert mode)


You can read for some documentation on compressor.


You can read for some documentation on limiter.

Volume boost

Volume boost is an audio effect for increasing audio loudness. The processing is parametrized by a target gain value, which determines the maximum amount by which an audio signal will be amplified; signals amplified outside of the sample range supported by the platform are compressed.

This effect is simple but you can always achieve better results by using the pre amp and eventually the limiter settings!

Bass boost

Bass boost is an audio effect to boost or amplify low frequencies of the sound. It is comparable to a simple equalizer but limited to one band amplification in the low frequency range.

This effect is simple but you can always achieve better results by using the advanced equalizer and fine tuning the bands.

Expert mode

In advanced settings you can enable the expert mode for the equalizer. ([Wiki] Settings - Advanced)
This enables full control over the equalizer bands and open more options for the compressor and the limiter.

You can add as many bands as necessary by pressing again the Add button. (Duplicated bands are automatically ignored)

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