# Frequency Resolution

On this page, you select the Frequency Resolution that you want to train on.

![The Frequency Resolution set-up window](https://3465913129-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F35ssi0AM5G2ho2oSgGf3%2Fuploads%2FOSI5Gde9F8FmD2vlj4Af%2FScreen%20Shot%202022-05-29%20at%2012.10.36%20pm.png?alt=media\&token=340c427c-cd3d-4c39-a39e-c4aac08b76f2)

The Frequency Resolution sets the number of possible frequencies that are randomly\* selected and is directly related to difficulty.

**2-Octave Bands** randomly\* selects from 5 frequencies (Easy):

* 63, 250, 500, 1k, 4k, or 16k Hz.

**Octave Bands** randomly\* selects from 10 frequencies (Medium):

* 31.5, 63, 125, 250, 500, 1k, 2k, 4k, 8k, or 16k Hz.

**1/3-Octave Bands** randomly\* selects from 28 frequencies (Hard):

* 31.5, 40, 50, 63, 80, 100, 125, 160, 200, 250, 315, 400, 500, 630, 800, 1k, 1.25k, 1.6k, 2k, 2.5k, 3.15k, 4k, 5k, 6.3k, 8k, 10k, 12.5k, or 16k Hz.

If Frequency was not chosen as a Training Parameter in the previous step, the selected Frequency Resolution will only be used if the Frequency parameter is set to '[Variable](https://frequia.gitbook.io/frequia/advanced-training/fixed-vs-variable-parameters)'.

{% hint style="info" %}
\*Dependent on whether [Adaptive Training](https://frequia.gitbook.io/frequia/advanced-training/adaptive-training) is enabled.
{% endhint %}