Sound Level Meter Response Time

Controls: Options >> Sound Level Meter >> Fast, Slow, etc.
Macro: SPLresp

This button shows the name of the time response characteristic. The default names are Fast, Slow, Quasi-Pk, PPM, and Custom. Clicking on the button opens the SPL Response TCs dialog to allow a different response to be selected from among those already define, or to define a new response and name as desired.

The response time is analogous to the damping of a conventional mechanical meter movement. It is usually desireable to slow the response of the display in order to obtain an average value when the signal is rapidly changing.

There are separate controls for Attack and Decay damping. However, if the Decay value is set to zero, it is disabled and the display uses a simple single damping value set via the Attack control.

Usually when both Attack and Decay are used, Attack is set much shorter in order to respond to sudden changes. But since the human ear is less sensitive to very brief sounds, Attack is typically set to a non-zero value to deliberately reduce the response to such sounds. (Daqarta uses an Attack value of zero to disable the Response function, so the meter responds Meter responds immediately to all changes.)

• Select
  • Fast
  • Slow
  • Quasi-Pk
  • PPM
  • Custom
• Name Edit
• Attack
• Decay

Macro Notes:

SPLresp=1 opens the SPL Response TCs dialog, SPLresp=0 closes it, and SPLresp=x toggles between open and closed.

Note that you do not need to open the dialog to change its controls directly via macro commands.