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'thanks to Rick Ratayczak of Future Works Media (rickr@execpc.com) 'save file and rename them to [name].BAS Attribute VB_Name = "MIXER" '**************************************************************************** '* This constant holds the value of the Highest Custom volume setting. The * '* lowest value will always be zero. * '**************************************************************************** Public Const HIGHEST_VOLUME_SETTING = 12 'Put these into a module ' device ID for aux device mapper Public Const AUX_MAPPER = -1& Public Const MAXPNAMELEN = 32 Type AUXCAPS wMid As Integer wPid As Integer vDriverVersion As Long szPname As String * MAXPNAMELEN wTechnology As Integer dwSupport As Long End Type ' flags for wTechnology field in AUXCAPS structure Public Const AUXCAPS_CDAUDIO = 1 ' audio from internal CD-ROM drive Public Const AUXCAPS_AUXIN = 2 ' audio from auxiliary input jacks ' flags for dwSupport field in AUXCAPS structure Public Const AUXCAPS_VOLUME = &H1 ' supports volume control Public Const AUXCAPS_LRVOLUME = &H2 ' separate left-right volume control Declare Function auxGetNumDevs Lib "winmm.dll" () As Long Declare Function auxGetDevCaps Lib "winmm.dll" Alias "auxGetDevCapsA" (ByVal uDeviceID As Long, lpCaps As AUXCAPS, ByVal uSize As Long) As Long Declare Function auxSetVolume Lib "winmm.dll" (ByVal uDeviceID As Long, ByVal dwVolume As Long) As Long Declare Function auxGetVolume Lib "winmm.dll" (ByVal uDeviceID As Long, ByRef lpdwVolume As Long) As Long Declare Function auxOutMessage Lib "winmm.dll" (ByVal uDeviceID As Long, ByVal msg As Long, ByVal dw1 As Long, ByVal dw2 As Long) As Long '**************************************************************************** '* Possible Return values from auxGetVolume, auxSetVolume * '**************************************************************************** Public Const MMSYSERR_NOERROR = 0 Public Const MMSYSERR_BASE = 0 Public Const MMSYSERR_BADDEVICEID = (MMSYSERR_BASE + 2) '**************************************************************************** '* Use the CopyMemory function from the Windows API * '**************************************************************************** Public Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (hpvDest As Any, hpvSource As Any, ByVal cbCopy As Long) '**************************************************************************** '* Use this structure to break the Long into two Integers * '**************************************************************************** Public Type VolumeSetting LeftVol As Integer RightVol As Integer End Type Sub lCrossFader() 'Vol1 = 100 - Slider1.Value ' Left 'Vol2 = 100 - Slider5.Value ' Right 'E = CrossFader.Value 'F = 100 - E 'If Check4.Value = 1 Then ' Half Fader Check ' LVol = (F * Val(Vol1) / 100) * 2 ' RVol = (E * Val(Vol2) / 100) * 2 ' If LVol > (50 * Val(Vol1) / 100) * 2 Then ' LVol = (50 * Val(Vol1) / 100) * 2 ' End If ' If RVol > (50 * Val(Vol2) / 100) * 2 Then ' RVol = (50 * Val(Vol2) / 100) * 2 ' End If 'Else ' LVol = (F * Val(Vol1) / 100) ' RVol = (E * Val(Vol2) / 100) 'End If 'Label1.Caption = "Fader: " + LTrim$(Str$(LVol)) + " x " + LTrim$(Str$(RVol)) ' End Sub Public Function lSetVolume(ByRef lLeftVol As Long, ByRef lRightVol As Long, lDeviceID As Long) As Long '**************************************************************************** '* This function sets the current Windows volume settings to the specified * '* device using two Custom numbers from 0 to HIGHEST_VOLUME_SETTING for the * '* right and left volume settings. * '* * '* The return value of this function is the Return value of the auxGetVolume* '* Windows API call. * '**************************************************************************** Dim bReturnValue As Boolean ' Return Value from Function Dim Volume As VolumeSetting ' Type structure used to convert a long to/from ' two Integers. Dim lAPIReturnVal As Long ' Return value from API Call Dim lBothVolumes As Long ' The API passed value of the Combined Volumes '**************************************************************************** '* Calculate the Integers * '**************************************************************************** Volume.LeftVol = nSigned(lLeftVol * 65535 / HIGHEST_VOLUME_SETTING) Volume.RightVol = nSigned(lRightVol * 65535 / HIGHEST_VOLUME_SETTING) '**************************************************************************** '* Combine the Integers into a Long to be Passed to the API * '**************************************************************************** lDataLen = Len(Volume) CopyMemory lBothVolumes, Volume.LeftVol, lDataLen '**************************************************************************** '* Set the Value to the API * '**************************************************************************** lAPIReturnVal = auxSetVolume(lDeviceID, lBothVolumes) lSetVolume = lAPIReturnVal End Function Public Function lGetVolume(ByRef lLeftVol As Long, ByRef lRightVol As Long, lDeviceID As Long) As Long '**************************************************************************** '* This function reads the current Windows volume settings from the * '* specified device, and returns two numbers from 0 to * '* HIGHEST_VOLUME_SETTING for the right and left volume settings. * '* * '* The return value of this function is the Return value of the auxGetVolume* '* Windows API call. * '**************************************************************************** Dim bReturnValue As Boolean ' Return Value from Function Dim Volume As VolumeSetting ' Type structure used to convert a long to/from ' two Integers. Dim lAPIReturnVal As Long ' Return value from API Call Dim lBothVolumes As Long ' The API Return of the Combined Volumes '**************************************************************************** '* Get the Value from the API * '**************************************************************************** lAPIReturnVal = auxGetVolume(lDeviceID, lBothVolumes) '**************************************************************************** '* Split the Long value returned from the API into to Integers * '**************************************************************************** lDataLen = Len(Volume) CopyMemory Volume.LeftVol, lBothVolumes, lDataLen '**************************************************************************** '* Calculate the Return Values. * '**************************************************************************** lLeftVol = HIGHEST_VOLUME_SETTING * lUnsigned(Volume.LeftVol) / 65535 lRightVol = HIGHEST_VOLUME_SETTING * lUnsigned(Volume.RightVol) / 65535 lGetVolume = lAPIReturnVal End Function Public Function nSigned(ByVal lUnsignedInt As Long) As Integer Dim nReturnVal As Integer ' Return value from Function If lUnsignedInt > 65535 Or lUnsignedInt < 0 Then MsgBox "Error in conversion from Unsigned to nSigned Integer" nSignedInt = 0 Exit Function End If If lUnsignedInt > 32767 Then nReturnVal = lUnsignedInt - 65536 Else nReturnVal = lUnsignedInt End If nSigned = nReturnVal End Function Public Function lUnsigned(ByVal nSignedInt As Integer) As Long Dim lReturnVal As Long ' Return value from Function If nSignedInt < 0 Then lReturnVal = nSignedInt + 65536 Else lReturnVal = nSignedInt End If If lReturnVal > 65535 Or lReturnVal < 0 Then MsgBox "Error in conversion from nSigned to Unsigned Integer" lReturnVal = 0 End If lUnsigned = lReturnVal End Function | 