Bilanciamento degli altoparlanti a livello di sistema in modo programmatico su Windows 7

Question

Come è possibile modificare a livello di programmazione il bilanciamento dei diffusori a livello di sistema su Windows 7?

(posso solo programma in Python e AHK.)

Answer 1

Per prima cosa installare il pacchetto python Comtypes sia da

1. utilizzando pip installare comtypes

   o

2. scaricare da https://pypi.python.org/pypi/comtypes e quindi estrarre la cartella di download. Trova setup.py nella cartella estratta. cmd Aperte andare al percorso di setup.py e quindi eseguire il comando python setup.py install

Ora basta eseguire il file code.py e si può regolare il volume, cambiando il primo argomento della funzione SetMasterVolumeLevel (-25, None) il primo argomento deve essere tra -65 a 0. ho provato questo codice in Windows 8 si spera che funzionerà su Windows 7.

Vedi all'ultimo linee di codice per trovare il volume.SetMasterVolumeLevel (-25, None) e adusto il volume del 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