The EAX Reverb has a more advanced parameter set than EfxEffectType.Reverb, but is only natively supported on devices that support the EAX 3.0 or above.
Syntax
Requirements
Namespace: OpenTK.Audio.OpenAL
Assembly: OpenTK-1.0 (in OpenTK-1.0.dll)
Assembly Versions: 0.0.0.0