Sound Trigger

Use input level threshold crossings to request app actions

Sound Trigger listens to a selected audio input and requests an app action when the input level rises above the threshold you set. For example, a loud tap, clap, tone, or other sound can request an action such as Shoot.

Sound Trigger is an amplitude trigger. It does not recognize words, phrases, pitch, or sound type. It only watches how loud the selected input is.

Before you start

  • Make sure Windows can use your microphone or audio input device.
  • Allow the app to access the microphone in Windows privacy settings.
  • Choose the input device you want Sound Trigger to monitor.
  • Start with Actions disabled while tuning the threshold.
  • Use a cooldown value that prevents repeated accidental actions.

For packaged installs, Windows may require microphone permission before the input can be opened. For unpackaged desktop runs, Windows desktop-app microphone privacy settings still apply.

Page controls

  • Start begins listening to the selected input device.
  • Stop ends listening and releases the input device.
  • The input device list selects which microphone or audio input to monitor.
  • The refresh button beside the input device list checks Windows for newly connected input devices.
  • The threshold slider sets the input level needed to request the action.
  • The level bar below the threshold slider shows the current input level while Sound Trigger is listening.
  • The action list selects the action to request when the threshold is crossed.
  • The cooldown value sets how long Sound Trigger waits after sending an action before it can send another one.
  • Actions enabled allows threshold crossings to run the selected action.
  • Actions disabled lets you tune levels without running actions.
  • The event history shows listener state, requested actions, disabled-action feedback, and blocked repeat triggers.

Quick setup

  1. Open Sound Trigger from Triggers, Sound.
  2. Select the input device.
  3. Select the action.
  4. Set a cooldown value.
  5. Leave Actions disabled.
  6. Press Start.
  7. Make the sound you want to use as the trigger.
  8. Watch the level bar and adjust the threshold slider until normal background noise stays below the threshold.
  9. Turn Actions enabled on when the level behavior is reliable.

Start with a higher threshold and lower it only after you see that normal room noise does not cross it.

Threshold

Threshold is the input level that must be reached before Sound Trigger requests the selected action.

Raise Threshold when:

  • Background noise triggers actions.
  • The level bar often rises near the threshold when nothing intentional happened.
  • One sound produces several near-threshold peaks.

Lower Threshold when:

  • The intended sound is visible on the level bar but does not trigger.
  • The input device is quiet even with Windows input volume set correctly.

Use the level bar while tuning. The best threshold sits above normal room noise and below the sound you intentionally make.

Cooldown

Cooldown is applied after Sound Trigger sends an action request. While cooldown is active, additional threshold crossings are ignored.

Use cooldown to prevent one sound from firing the same action many times. For camera capture actions, start with a cooldown of at least one or two seconds. Increase it if the same sound or echo can cross the threshold repeatedly.

The event history shows cooling down feedback while repeat triggers are being suppressed.

Actions enabled

Keep Actions disabled while setting up. In this mode, Sound Trigger can listen and show the input level, but threshold crossings do not run the selected action.

Turn Actions enabled on only after the threshold and cooldown are tuned. This is especially important for actions that can affect camera state, capture images, or interrupt your workflow.

Profile startup

Sound Trigger remembers whether it was listening when the profile was saved or when the app closed. If Sound Trigger was listening, it starts automatically the next time the selected profile is applied.

Stop Sound Trigger before saving the profile or closing the app when you want it to remain off the next time the profile is applied. This keeps microphone device scanning and shutdown cleanup out of normal startup when Sound Trigger is not in use.

Action

Choose the action that should run when the input level crosses the threshold. For camera capture workflows, Shoot is the usual choice.

Input devices

The input list comes from Windows audio input devices. If an expected microphone is missing:

  • Check that Windows sees the device.
  • Confirm the device is enabled in Windows sound settings.
  • Reconnect USB audio devices.
  • Use the refresh button beside the input list after connecting or enabling a device.
  • Close other apps that may be using the device exclusively.
  • Restart the app only if Windows still does not report the device after refreshing.

If the wrong device is selected, Sound Trigger may show little or no level movement even though another microphone is active.

In-app window

Sound Trigger can be shown in its own in-app window from Settings > Windows. Use a separate window when you want to keep the level bar and event history visible while working on another app page.

When Sound Trigger is already open in a separate window, selecting its normal navigation item locates the separate window instead of showing a second copy in the main frame.

Troubleshooting

If Start is disabled:

  • Select an input device.
  • Stop any previous listener state before changing devices.
  • Check that the app can see at least one Windows audio input device.

If the level bar does not move:

  • Make sure the selected input device is the one you are using.
  • Check Windows microphone privacy settings.
  • Check Windows input volume.
  • Test the microphone in Windows sound settings or another recording app.
  • Close other apps that may be holding the input device.

If actions do not run:

  • Turn Actions enabled on.
  • Confirm the selected action is the one you intended.
  • Lower Threshold only after confirming the level bar crosses it.
  • Check the event history for disabled-action or cooldown feedback.

If actions run too often:

  • Raise Threshold.
  • Increase Cooldown.
  • Move the microphone away from the sound source.
  • Reduce Windows input gain.
  • Turn Actions disabled until the trigger is tuned.

If actions trigger from background noise:

  • Raise Threshold above the normal room noise level.
  • Use a more directional microphone.
  • Move the microphone away from fans, speakers, keyboards, and other noise.
  • Increase Cooldown so short bursts do not fire repeatedly.

Related setup

Use Voice Trigger when you want spoken phrases to request actions. Use Hotkeys when you want keyboard-triggered actions. Use Scanner when barcode input should fill fields or trigger an action.

Sound Trigger, Voice Trigger, Hotkeys, and Scanner can all request app actions, so you can choose the trigger style that fits the workflow.