Dorrough 40-A Specifications download pdf (Page 19)

During the Loudness capture, you may now toggle the capture between ‘Start’ and ‘Pause’. The

overall resulting loudness readings will express the summarized capture of all audio above -

70dBFS from the last Reset.

Hitting ‘Reset’ will re-initiate the Loudness Capture and measures.

Overall, the Start-Pause mode allows you to manually start and stop the capture during breaks

or audio that you do not wish to consider in the overall loudness readings.

Auto-Start Mode

The Auto-Start mode has controls and options similar to those of the Start-Pause Mode, with the

addition of an automatic start/reset facility triggered by the audio level.

More specifically, if the audio is higher than -70dBFS, the Loudness Capture is automatically

started, as well as being automatically stopped and Reset when the audio drops below -70dBFS

again for more than 2 seconds.

This mode is particularly handy when working with smaller bits of audio, and frees you from

having to manually reset the loudness capture every time you want a new reading.

Loudness Option

The Loudness option section allows you define what loudness parameter you wish displayed as the Loudness

Bargraph as well as setting up the Capture mode of your loudness measurements.

Capture

The Loudness capture functionality may be changed between three different modes; Start-

Pause, Auto-Start and Auto-LTC.

Loudness measurement or Capture is essentially always done over a timespan - hence, it is

necessary to define when the Loudness capture starts and stops.

As explained in the Loudness & Terminology section, several different Loudness measures are

relevant i.e. Momentary Loudness, Short-term Loudness, Integrated Loudness and Loudness

Range – all time dependent.

The Start-Pause Mode

Is in effect a manual mode that allows you to decide when the Loudness capture starts, pauses,

and restarts or is reset.

The button expresses the Loudness capture state the meter is in, e.g. ‘Start’ indicates that the

Loudness Captured has been started.

Loudness Capture is dependent on the incoming signal level being higher than -70dBFS.

Note: Enabling a Loudness Bargraph requires audio to be routed to the relevant bar graph position.

Note: As per the BS1770 standards, audio below -70dBFS is not included in the overall

loudness capture. This is to avoid that breaks or silence in the audio undermines the

loudness readings.

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Dorrough 40-A Specifications Page 19