Numbers (Windows Multimedia)
[The feature associated with this page, Audio Mixers, is a legacy feature. It has been superseded by Volume Controls. Volume Controls has been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use Volume Controls instead of Audio Mixers, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The number controls allow the user to enter numerical data associated with a line. The numerical data is expressed as signed integers, unsigned integers, or integer decibel values. These controls use the MIXERCONTROLDETAILS_SIGNED and MIXERCONTROLDETAILS_UNSIGNED structures to retrieve and set control properties. The following table describes the types of number controls.
| Control | Description |
|---|---|
| Signed | Allows integer values entered in the range of – 231 through (231 –1). |
| Unsigned | Allows integer values entered in the range of 0 through (232 –1). |
| Decibel | Allows integer decibel values to be entered, in tenths of decibels. The range of values for this control is –32,768 through 32,767. |
| Percent | Allows values to be entered as percentages. |
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