Shortcut(created by @AndreMiras) --> use Pycaw , usage of Pycaw can be find here
Detailed way -- > First install python package Comtypes either by
using pip install comtypes
or
download from https://pypi.python.org/pypi/comtypes and then extract the download folder. Find setup.py in extracted folder . Open cmd go to the path of setup.py and then run the command python setup.py install
Now just run the code.py file and you can adjust the volume by changing the first argument of function SetMasterVolumeLevel(-25, None) the first argument must be in between -65 to 0.
I have tried this code in windows 8 hopefully it will work on windows 7.
See at the last lines of code to find the volume.SetMasterVolumeLevel(-25, None) and to adust the volume of PC
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