Hi men :)
A week ago I asked for some help in MasterDrive.it community on how I could set volume level of WAV sounds before that my application played them using the PlaySound API function. In that thread, I didn't found anything helpful, so I decided to post here.
Looking for a solution, I found this example on Microsoft's web site:
and it seems that it's what I was looking for, that is a way to change volume level only for the sounds played by my program, without changing the Master Mixer's settings.
Trying to run the code above, VB returns me an error saying that it's impossibile to find the MMSYSTEM.dll So I looked into my System32 folder to see if I really miss this dll, but I discovered I have that file.
So why VB can't access to that functions?
Moreover, because that error doesn't let me try the code, I don't know if it works or not.
So my question is: do you know a way to change volume level of a sound that is going to be played by PlaySound function called by a SINGLE application (mine), without modifing Master Volume settings?
I tryed using DirectX and DirectSound, but they don't meet my needs.
If only I could try the code above...Do you know how to fix the error that appears?
Thank you very very much,
bye :wave:
A week ago I asked for some help in MasterDrive.it community on how I could set volume level of WAV sounds before that my application played them using the PlaySound API function. In that thread, I didn't found anything helpful, so I decided to post here.
Looking for a solution, I found this example on Microsoft's web site:
Code:
Option Explicit
Private Declare Function sndPlaySound Lib "MMSYSTEM.DLL" (ByVal lpszSoundName As String, ByVal wFlags As Integer) As Integer
Private Declare Function waveoutSetVolume Lib "MMSYSTEM.DLL" (ByVal wDeviceID As Integer, ByVal dwVolumeRight As Integer, ByVal dwVolumeLeft As Integer) As Integer
Private Declare Function waveOutGetVolume Lib "MMSYSTEM.DLL" (ByVal wDeviceID As Integer, lpdwvolume As Long) As Integer
Const SND_ASYNC = &H1
Const SND_NODEFAULT = &H2
Dim CurrentVolLeft As Long
Dim CurrentVolRight As Long
Sub Form_Load()
Dim x As Integer
Dim BothVolumes As Long
' Note that the waveid is 0 indicating the first wave output device.
' If you were to play multiple wavefiles on multiple wave output devices
' you would use 1 for the second wave output device, 2 for the third and
' so on.
' This code will retrieve the current volume setting
x = waveOutGetVolume(0, BothVolumes)
' This code isolates the low-order word.
' Note that the value &HFFFF& is a Long Integer, which is the same
' as 0000FFFF, but because Visual Basic would automatically
' truncate this to FFFF, you must force the logical operation to use
' a four-byte Long Integer (0000FFFF) rather than a two-byte Integer
' (FFFF). This is accomplished by using the type casting
' character (&).
CurrentVolLeft = BothVolumes And &HFFFF&
' This code isolates the high-order word.
' Enter the following two lines as one, single line:
CurrentVolRight = ((BothVolumes And &HFFFF0000) / &H10000) And &HFFFF&
LeftVol.Caption = Hex$(CurrentVolLeft) ' Update the label with the
RightVol.Caption = Hex$(CurrentVolRight) ' current volume settings.
End Sub
Sub PlaySound_Click()
Dim x As Integer
Dim wFlags As Integer
Dim SoundName As String
SoundName = "C:\WINDOWS\MSREMIND.WAV" ' Pick any wave file.
wFlags = SND_ASYNC Or SND_NODEFAULT
x = sndPlaySound(SoundName$, wFlags%) ' Play the wave file.
End Sub
Sub LeftUp_Click()
' Increase the left sound channel setting:
Dim x As Integer
CurrentVolLeft = CurrentVolLeft + &H1000&
' Prevent the channel setting from exceeding the maximum limit:
If CurrentVolLeft > &HFFFF& Then CurrentVolLeft = &HFFFF&
LeftVol.Caption = Format$(Hex$(CurrentVolLeft))
' Enter the following two lines as one, single line:
x = waveoutSetVolume(0, CInt("&H" + Hex$(CurrentVolRight)), CInt("&H" + Hex$(CurrentVolLeft)))
End Sub
Sub LeftDown_Click()
' Decrease the left sound channel setting:
Dim x As Integer
CurrentVolLeft = CurrentVolLeft - &H1000&
' Prevent the channel setting from dropping below the minimum limit:
If CurrentVolLeft < &H0& Then CurrentVolLeft = &H0&
LeftVol.Caption = Hex$(CurrentVolLeft)
' Enter the following two lines as one, single line:
x = waveoutSetVolume(0, CInt("&H" + Hex$(CurrentVolRight)), CInt("&H" + Hex$(CurrentVolLeft)))
End Sub
Sub RightUp_Click()
' Increase the right sound channel setting:
Dim x As Integer
CurrentVolRight = CurrentVolRight + &H1000&
' Prevent the channel setting from exceeding the maximum limit.
If CurrentVolRight > &HFFFF& Then CurrentVolRight = &HFFFF&
RightVol.Caption = Hex$(CurrentVolRight)
' Enter the following two lines as one, single line:
x = waveoutSetVolume(0, CInt("&H" + Hex$(CurrentVolRight)), CInt("&H" + Hex$(CurrentVolLeft)))
End Sub
Sub RightDown_Click()
' Decrease the right sound channel setting:
Dim x As Integer
CurrentVolRight = CurrentVolRight - &H1000&
' Prevent the channel setting from dropping below the minimum limit:
If CurrentVolRight < 0 Then CurrentVolRight = 0
RightVol.Caption = Hex$(CurrentVolRight)
' Enter the following two lines as one, single line:
x = waveoutSetVolume(0, CInt("&H" + Hex$(CurrentVolRight)), CInt("&H" + Hex$(CurrentVolLeft)))
End SubTrying to run the code above, VB returns me an error saying that it's impossibile to find the MMSYSTEM.dll So I looked into my System32 folder to see if I really miss this dll, but I discovered I have that file.
So why VB can't access to that functions?
Moreover, because that error doesn't let me try the code, I don't know if it works or not.
So my question is: do you know a way to change volume level of a sound that is going to be played by PlaySound function called by a SINGLE application (mine), without modifing Master Volume settings?
I tryed using DirectX and DirectSound, but they don't meet my needs.
If only I could try the code above...Do you know how to fix the error that appears?
Thank you very very much,
bye :wave: