Meters

The meter controls measure data passing through an audio line. These controls use the MIXERCONTROLDETAILS_BOOLEANSS9VH5, MIXERCONTROLDETAILS_SIGNEDXMLR0U, and MIXERCONTROLDETAILS_UNSIGNED1BGSAYP structures to retrieve and set control properties. The following table describes the types of meters.

Control

Description

 

 

 

Boolean

Measures whether an integer value is FALSE/OFF (zero) or TRUE/ON (nonzero).

 

Peak

Measures the deflection from 0 in both the positive and negative directions. The range of integer values for the peak meter is - 32,768 through 32,767.

 

Signed

Measures integer values in the range of - 231 through (231 -  1). The mixer driver defines the limits of this meter.

 

Unsigned

Measures integer values in the range of 0 through (232 -  1). The mixer driver defines the limits of this meter.