The sound EQ is a filter that every sound in the patient's library plays through. Setting it from the dashboard is how you shape the sound therapy for one patient rather than leaving the choice to them.

There are two parts, and they are independent. A notch removes a narrow band of sound around a centre frequency you choose. A boost lifts a narrow band instead, by an amount you choose. You can set a notch, a boost, both, or neither.

There is one EQ, and the patient can always reach it. What you save is the setting in their app; what they change afterwards is the setting in their app. The card always shows the one that is in force.

Open the patient and go to the Sound Therapy tab. The Sound therapy settings card is at the top. Changing it needs the Manage Patients permission; colleagues without it see the current setting and who set it, but no controls.

The card is only available for patients recorded in the United States, matching where the EQ is offered in the app. A patient recorded elsewhere sees a note saying so.

The card opens on the patient's current EQ, whoever set it. Switch on Notch, Boost, or both, and each part you switch on opens its own controls.

A notch takes a centre frequency. A boost takes a centre frequency and a gain. Frequency runs from 500 Hz to 16 kHz on each part, and boost gain runs from 1 to 12 dB. Use the slider to sweep the range, or type an exact figure in the box beside it if you have pitch matched in clinic.

Above the controls is a preview of the frequency response, drawn the same way the patient sees it in their app. It updates as you move the sliders, so you can see the shape of the filter before you commit to it.

Save setting is the only action. Their app picks the setting up the next time it syncs and applies it to every library sound. Switching both parts off and saving is a setting in its own right: it turns the EQ off.

A save is the whole EQ rather than an addition to it. If the patient had a notch and a boost and you now save a notch alone, the boost is removed. What you see on the card when you save is what the patient gets.

Their EQ screen says the setting was made by their clinician. The controls stay live: this is not a lock.

The first time they change anything, their app warns them once. It quotes your setting so they can note it down, tells them that changing it replaces yours, and asks whether to carry on. If they cancel, nothing changes. If they carry on, their change is applied and the setting becomes theirs, so the note about you disappears and they are not asked again.

There is no restore button. If a patient has moved away from your setting and wants it back, either they noted it from the warning, or you set it again from the card.

One line under Save says where the setting standing on the card came from. It reads Set by your name with the date while the EQ is the one you saved, and Adjusted by the patient with the date once they have changed it themselves.

Saving again always makes your setting the one in use, and the line goes back to your name.