Editing > Audio > Adjusting EQ Settings on the EQ Desk >

# Using Parametric Mid Filters

The Notch and Presence Parametric Mid filters can be used to reduce or remove unwanted audio anywhere in the frequency spectrum.

To reduce or remove an unwanted frequency using Parametric Mid filters:

1. Ensure that each audio track that you want to work with is assigned to an AudioDesk input strip. See Assigning an Audio Track to an AudioDesk Input Strip.
2. Play the clip and listen for the unwanted portion of the audio signal.
3. Boost the gain for the Parametric Mid filter of the EQ strip that you are working with.
4. Play your audio clip again.
5. While the audio is playing, click and drag the Frequency knob for the Parametric Mid filter.

   The unwanted frequency will be very loud when you have selected the correct frequency.

6. Once you isolate the unwanted frequency, stop dragging the Frequency knob.
7. Do one of the following:
   - To reduce the frequency, select Presence from the Filter Type box and lower the gain knob for the Parametric Mid filter enough so that the unwanted frequency is attenuated without affecting the overall audio signal.
   - To remove the unwanted frequency completely, change the filter type to Notch.