WAVEOUTCAPS Structure

Type WAVEOUTCAPS
  wMid As Integer
  wPid As Integer
  vDriverVersion As Long
  szPname As String * 32
  dwFormats As Long
  wChannels As Integer
  dwSupport As Long
End Type

WAVEOUTCAPS-type variables store information about a waveform output device's capabilities as well as other information about it. The various members of the structure identify the abilities of the device.

wMid

The manufacturer identifier of the maker of the device.

wPid

The product identifier of the device.

vDriverVersion

The major and minor version numbers of the device. The high-order half of the value contains the major version number; the low-order half contains the minor version number.

szPname

A null-terminated string specifying the name of the device.

dwFormats

Zero or more of the following flags specifying the various audio output formats the device supports:

WAVE_FORMAT_1M08 = &H1: Supports 11.025 kHz, 8-bit, mono playback.
WAVE_FORMAT_1M16 = &H4: Supports 11.025 kHz, 16-bit, mono playback.
WAVE_FORMAT_1S08 = &H2: Supports 11.025 kHz, 8-bit, stereo playback.
WAVE_FORMAT_1S16 = &H8: Supports 11.025 kHz, 16-bit, stereo playback.
WAVE_FORMAT_2M08 = &H10: Supports 22.05 kHz, 8-bit, mono playback.
WAVE_FORMAT_2M16 = &H40: Supports 22.05 kHz, 16-bit, mono playback.
WAVE_FORMAT_2S08 = &H20: Supports 22.05 kHz, 8-bit, stereo playback.
WAVE_FORMAT_2S16 = &H80: Supports 22.05 kHz, 16-bit, stereo playback.
WAVE_FORMAT_4M08 = &H100: Supports 44.1 kHz, 8-bit, mono playback.
WAVE_FORMAT_4M16 = &H400: Supports 44.1 kHz, 16-bit, mono playback.
WAVE_FORMAT_4S08 = &H200: Supports 44.1 kHz, 8-bit, stereo playback.
WAVE_FORMAT_4S16 = &H800: Supports 44.1 kHz, 16-bit, stereo playback.

wChannels

The number of audio channels on the device. 1 means a mono device; 2 means a stereo device.

dwSupport

Zero or more of the following flags specifying which features the device supports:

WAVECAPS_LRVOLUME = &H8: Supports separate left and right channel volumes.
WAVECAPS_PITCH = &H1: Supports pitch control.
WAVECAPS_PLAYBACKRATE = &H2: Supports playback rate control.
WAVECAPS_SAMPLEACCURATE = &H20: Supports returning of sample-accurate position information.
WAVECAPS_SYNC = &H10: Supports synchronous playback -- i.e., it will block while playing buffered audio.
WAVECAPS_VOLUME = &H4: Supports volume control.

Used by: waveOutGetDevCaps

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