用Windows API进行声道控制
方法一:
WAVEOUTCAPS pwoc;
UINT uDeviceID=waveOutGetNumDevs();//Can not use
waveOutGetDevCaps(0,&pwoc,sizeof(WAVEOUTCAPS));
waveOutSetVolume(NULL,0xFFFFFFFF);//the max sound
oxFFFFFFFF每两个字节代表一个声道
方法二:
关闭音箱:
lReturn=mciSendString("set left off",sReturn,32,0);
lReturn=mciSendString("set right off",sReturn,32,0);
lReturn=mciSendString("setaudio left off",sReturn,32,0);
lReturn=mciSendString("setaudio right off",sReturn,32,0);
关闭声道:
lReturn=mciSendString("setaudio source to left",sReturn,32,0);
lReturn=mciSendString("setaudio source to right",sReturn,32,0);
lReturn=mciSendString("setaudio source to average",sReturn,32,0);
lReturn=mciSendString("setaudio source to stereo",sReturn,32,0);
方法三:
waveOutGetVolume(//获取指定并输出设备的音量值
HWAVEOUT hwo,LPDWORD lpdwVolume);
midiOutGetVolume(//获取指定内部MIDI合成器设备音量值
HWAVEOUT hwo,LPDWORD lpdwVolume);
waveOutSetVolume(//设置指定波形输出设备的音量值
HWAVEOUT hwo,LPDWORD lpdwVolume);
midiOutGetVolume(//设置指定内部MIDI合成器设备音量值
HWAVEOUT hwo,LPDWORD lpdwVolume);
用TrackBar实现:
void __fastcall TForm1::FormShow(TObject *Sender)
{
DWORD Volume1,Volume2;
waveOutGetVolume(0,&Volume1);
TrackBar1->Position=Volume1;
midiOutGetVolume(0,&Volume2);
TrackBar2->Position=Volume2;
}
void __fastcall TForm1::TrackBar2Change(TObject *Sender)
{
midiOutSetVolume(0,TrackBar2->Position);
}
void __fastcall TForm1::TrackBar1Change(TObject *Sender)
{
waveOutSetVolume(0,TrackBar1->Position);
}
方法四:
ShellExecute(NULL,NULL,"sndvol32.exe",NULL,NULL,SW_SHOW); 试了下,还是不行啊,能不能在我的代码上改一改看???多谢了!! 我再顶,顶,顶,顶,高手都到哪去了啊????:face (36): :face (18):高手还在潜水?? 本帖最后由 My2009 于 2009-9-16 08:06 编辑
实现不了,还是咋了?这么久都没人解啊?顶顶顶:face (3):我再顶顶顶顶 借花献佛:#include <GUIConstantsEx.au3>
#include <ButtonConstants.au3>
#include <GUIConstants.au3>
#include <WindowsConstants.au3>
#include <Sound.au3>
Local $musicf, $_audio, $btn1, $btn2, $btn3, $btn4, $sound
#Region ### STARTGUI section ###
$musicf = "e:\smrf.mp3"
$_audio = GUICreate("左右声道测试V1.0 By:Tom_Zhou", 400, 100)
$btn1 = GUICtrlCreateButton("双声道", 20, 30, 60, 25, $BS_DEFPUSHBUTTON)
$btn2 = GUICtrlCreateButton("左声道", 90, 30, 60, 25)
$btn3 = GUICtrlCreateButton("右声道", 160, 30, 60, 25)
$btn4 = GUICtrlCreateButton("退 出", 230, 30, 60, 25)
GUISetState()
#EndRegion ### endGUI section ###
While 1
Switch GUIGetMsg()
Case $GUI_EVENT_CLOSE
Exit
Case $btn1
_LR()
Case $btn2
DllCall('winmm.dll', 'none', 'waveOutSetVolume', 'hwnd', 0, 'dword', 0xFFFF0000)
Case $btn3
DllCall('winmm.dll', 'none', 'waveOutSetVolume', 'hwnd', 0, 'dword', 0x0000FFFF)
Case $btn4
_SoundClose($sound)
ExitLoop
EndSwitch
WEnd
Func _LR()
$sound = _SoundOpen($musicf, "Startup")
If @error = 2 Then
MsgBox(0, "Error", "The file does not exist")
Exit
ElseIf @error = 3 Then
MsgBox(0, "Error", "The alias was invalid")
Exit
ElseIf @extended <> 0 Then
$extended = @extended
$stText = DllStructCreate("char")
$errorstring = DllCall("winmm.dll", "short", "mciGetErrorStringA", "str", $extended, "ptr", DllStructGetPtr($stText), "int", 128)
MsgBox(0, "Error", "The open failed." & @CRLF & "Error Number: " & $extended & @CRLF & "Error Description: " & DllStructGetData($stText, 1) & @CRLF & "Please Note: The sound may still play correctly.")
Else
EndIf
_SoundPlay($sound)
;DllCall('winmm.dll', 'none', 'waveOutSetVolume', 'hwnd', 0, 'dword', 0x0000FFFF)
EndFunc 不错,学习一下。。 本帖最后由 My2009 于 2009-11-4 08:49 编辑
非常感谢,太好了,呵呵!!!!:face (29): 谢谢~~~~~~~~ 谢谢~~~~~~~~ 留个记号关注一下。 不错,学习了。
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