Pirate Audio equalizer?

Is there an equalizer available in the Pirate Audio line out or headphone amp for raspberry pi?
Many thanks!

I’m no expert on this but I think that would need to be some type of alsa plugin or something?

Thanks alphanumeric,
If someone have tested this I would like to know.
With an old personal projet I enconter issue with equalizer and a PiFi DAC (Raspberry Pi modèle B Rev. 2 with Raspfi )