IBasicAudio::put_Volume

  • 项目

This method sets the volume (amplitude) of the audio signal.

HRESULT put_Volume(
  long lVolume
);

Parameters

  • lVolume
    [in] Value to which to set the Volume property. The allowable input range is –10,000 to 0.

Return Values

Returns an HRESULT value. E_INVALIDARG is returned for values outside the allowable input range and E_FAIL is returned if the underlying device returns an error.

Remarks

Full volume is 0, and –10,000 is silence; the scale is logarithmic. Multiply the desired decibel level by 100 (for example –10,000 = –100 dB).

Requirements

DirectShow applications and DirectShow filters have different include file and link library requirements. See Setting Up the Build Environment for more information.

OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.
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Last updated on Wednesday, April 13, 2005

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