Audio Trigger

The feature Audio Trigger enables you to trigger a single shot or to start a Timer or HDR sequence upon a change in ambient noise level, sensed by the internal or an external microphone. You can specify whether an increase or a decrease of the noise level should be the trigger signal. In the first case a bang or a clap, for example, might trigger the camera. The second use case is probably rather rare, but can, for example, be used to trigger the camera at the "end" of a noise event.

Please note that with this kind of audio trigger no high speed photography will be possible. The delay between the occurrence of the trigger signal and the time of the actual shot will not fall below a certain limit. Every part of the sequence microphone-operating system-app-audio signal-camera electronics-mirror will take its time, which will add up in the end to said lower limit.

To set up and activate an audio trigger, push the menu button in one of the frames Remote, Timer or HDR and choose the option Audio Trigger. A dialog is shown to set up the audio trigger. Caution: If the Current Value stays 0 all the time after inserting the IR dongle / cable into the audio output, your smartphone/tablet most probably switches off the internal microphone when a jack is plugged to the audio socket. This is a hardware issue and nothing can be done about or to prevent that from the software side (i.e. DSLR Remote). If you still want to use the audio trigger, you have to extend your hardware a little.

Parameters

Current Value

Intended as a guide only, showing the current sensed volume (If this is permanently "0", see the comment above) .

Trigger Level

The level at which the trigger should act can be set here, together with the required direction of change in volume. If you select above the audio trigger acts on an increase of volume (e.g. clap), if you select below it acts on an decrease.

Delay

This setting is only available in Remote mode and provides the possibility of a finer delay than the one second step width of the timer. Any value between 0 and 9999 millisceconds can be set.

Once / Repeated

Here you can choose whether the audio trigger should be activated again (with the previous parameters) immediately after a triggered shot or timer / HDR sequence is completed.

Start

By pressing the start button the audio trigger is activated and waits for the luminosity to exceed / fall below the set limit.