我该如何在Windows 7上通过编程方式改变系统级扬声器平衡?
(我只会用Python和AHK编程。)
快捷方式(由@AndreMiras创建)-->使用Pycaw,可以在此处找到Pycaw的用法说明。
详细步骤 -- >首先安装python包Comtypes:
使用pip install comtypes
或者
从https://pypi.python.org/pypi/comtypes下载并解压缩下载文件夹。在提取的文件夹中找到setup.py文件。打开命令提示符,进入setup.py路径,然后运行命令python setup.py install。
现在只需运行code.py文件,您可以通过更改函数SetMasterVolumeLevel(-25, None)的第一个参数来调整音量,第一个参数必须在-65到0之间。 我已经在Windows 8中尝试了这段代码,希望它也能在Windows 7上工作。
请查看代码的最后一行,以找到volume.SetMasterVolumeLevel(-25, None)来调整电脑的音量。
Code.py
from comtypes import *
import comtypes.client
from ctypes import POINTER
from ctypes.wintypes import DWORD, BOOL
MMDeviceApiLib = \
GUID('{2FDAAFA3-7523-4F66-9957-9D5E7FE698F6}')
IID_IMMDevice = \
GUID('{D666063F-1587-4E43-81F1-B948E807363F}')
IID_IMMDeviceEnumerator = \
GUID('{A95664D2-9614-4F35-A746-DE8DB63617E6}')
CLSID_MMDeviceEnumerator = \
GUID('{BCDE0395-E52F-467C-8E3D-C4579291692E}')
IID_IMMDeviceCollection = \
GUID('{0BD7A1BE-7A1A-44DB-8397-CC5392387B5E}')
IID_IAudioEndpointVolume = \
GUID('{5CDF2C82-841E-4546-9722-0CF74078229A}')
class IMMDeviceCollection(IUnknown):
_iid_ = GUID('{0BD7A1BE-7A1A-44DB-8397-CC5392387B5E}')
pass
class IAudioEndpointVolume(IUnknown):
_iid_ = GUID('{5CDF2C82-841E-4546-9722-0CF74078229A}')
_methods_ = [
STDMETHOD(HRESULT, 'RegisterControlChangeNotify', []),
STDMETHOD(HRESULT, 'UnregisterControlChangeNotify', []),
STDMETHOD(HRESULT, 'GetChannelCount', []),
COMMETHOD([], HRESULT, 'SetMasterVolumeLevel',
(['in'], c_float, 'fLevelDB'),
(['in'], POINTER(GUID), 'pguidEventContext')
),
COMMETHOD([], HRESULT, 'SetMasterVolumeLevelScalar',
(['in'], c_float, 'fLevelDB'),
(['in'], POINTER(GUID), 'pguidEventContext')
),
COMMETHOD([], HRESULT, 'GetMasterVolumeLevel',
(['out','retval'], POINTER(c_float), 'pfLevelDB')
),
COMMETHOD([], HRESULT, 'GetMasterVolumeLevelScalar',
(['out','retval'], POINTER(c_float), 'pfLevelDB')
),
COMMETHOD([], HRESULT, 'SetChannelVolumeLevel',
(['in'], DWORD, 'nChannel'),
(['in'], c_float, 'fLevelDB'),
(['in'], POINTER(GUID), 'pguidEventContext')
),
COMMETHOD([], HRESULT, 'SetChannelVolumeLevelScalar',
(['in'], DWORD, 'nChannel'),
(['in'], c_float, 'fLevelDB'),
(['in'], POINTER(GUID), 'pguidEventContext')
),
COMMETHOD([], HRESULT, 'GetChannelVolumeLevel',
(['in'], DWORD, 'nChannel'),
(['out','retval'], POINTER(c_float), 'pfLevelDB')
),
COMMETHOD([], HRESULT, 'GetChannelVolumeLevelScalar',
(['in'], DWORD, 'nChannel'),
(['out','retval'], POINTER(c_float), 'pfLevelDB')
),
COMMETHOD([], HRESULT, 'SetMute',
(['in'], BOOL, 'bMute'),
(['in'], POINTER(GUID), 'pguidEventContext')
),
COMMETHOD([], HRESULT, 'GetMute',
(['out','retval'], POINTER(BOOL), 'pbMute')
),
COMMETHOD([], HRESULT, 'GetVolumeStepInfo',
(['out','retval'], POINTER(c_float), 'pnStep'),
(['out','retval'], POINTER(c_float), 'pnStepCount'),
),
COMMETHOD([], HRESULT, 'VolumeStepUp',
(['in'], POINTER(GUID), 'pguidEventContext')
),
COMMETHOD([], HRESULT, 'VolumeStepDown',
(['in'], POINTER(GUID), 'pguidEventContext')
),
COMMETHOD([], HRESULT, 'QueryHardwareSupport',
(['out','retval'], POINTER(DWORD), 'pdwHardwareSupportMask')
),
COMMETHOD([], HRESULT, 'GetVolumeRange',
(['out','retval'], POINTER(c_float), 'pfMin'),
(['out','retval'], POINTER(c_float), 'pfMax'),
(['out','retval'], POINTER(c_float), 'pfIncr')
),
]
class IMMDevice(IUnknown):
_iid_ = GUID('{D666063F-1587-4E43-81F1-B948E807363F}')
_methods_ = [
COMMETHOD([], HRESULT, 'Activate',
(['in'], POINTER(GUID), 'iid'),
(['in'], DWORD, 'dwClsCtx'),
(['in'], POINTER(DWORD), 'pActivationParans'),
(['out','retval'], POINTER(POINTER(IAudioEndpointVolume)), 'ppInterface')
),
STDMETHOD(HRESULT, 'OpenPropertyStore', []),
STDMETHOD(HRESULT, 'GetId', []),
STDMETHOD(HRESULT, 'GetState', [])
]
pass
class IMMDeviceEnumerator(comtypes.IUnknown):
_iid_ = GUID('{A95664D2-9614-4F35-A746-DE8DB63617E6}')
_methods_ = [
COMMETHOD([], HRESULT, 'EnumAudioEndpoints',
(['in'], DWORD, 'dataFlow'),
(['in'], DWORD, 'dwStateMask'),
(['out','retval'], POINTER(POINTER(IMMDeviceCollection)), 'ppDevices')
),
COMMETHOD([], HRESULT, 'GetDefaultAudioEndpoint',
(['in'], DWORD, 'dataFlow'),
(['in'], DWORD, 'role'),
(['out','retval'], POINTER(POINTER(IMMDevice)), 'ppDevices')
)
]
enumerator = comtypes.CoCreateInstance(
CLSID_MMDeviceEnumerator,
IMMDeviceEnumerator,
comtypes.CLSCTX_INPROC_SERVER
)
print enumerator
endpoint = enumerator.GetDefaultAudioEndpoint( 0, 1 )
print endpoint
volume = endpoint.Activate( IID_IAudioEndpointVolume, comtypes.CLSCTX_INPROC_SERVER, None )
print volume
print volume.GetMasterVolumeLevel()
print volume.GetVolumeRange()
#volume.SetMasterVolumeLevel(-65, None) uncomment for 0 volume
#volume.SetMasterVolumeLevel(-1, None) uncomment for full volume
volume.SetMasterVolumeLevel(-25, None) #Change the first argument for controlling the volume remember it should be -ve not less than -65