Meters - Win32 Multimedia Programmer's Reference

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Meters

The meter controls measure data passing through an audio line. These controls use the MIXERCONTROLDETAILS_BOOLEAN, MIXERCONTROLDETAILS_SIGNED, and MIXERCONTROLDETAILS_UNSIGNED 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.

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