Core Audio APIs in Windows Vista: http://windowssdk.msdn.microsoft.com/en-us/library/ms678710.aspx This posting is provided "as is" with no warranties, and confers no rights -----Original Message----- From: wdmaudiodev-bounce@xxxxxxxxxxxxx [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of stephen turner Sent: Monday, July 17, 2006 7:09 PM To: wdmaudiodev@xxxxxxxxxxxxx Subject: [wdmaudiodev] Re: sample rate control on Vista > Is this API documented anywhere yet? Thanks Jeff. This was going to be my next question. All I can find is: http://blogs.msdn.com/larryosterman/archive/2005/12/07/501306.aspx -steve ---------------------- Stephen Turner AudioScience, Inc. www.audioscience.com -------- Original Message -------- > From: "Jeff Pages" <jeff@xxxxxxxxxxxxxxxx> > Sent: Monday, July 17, 2006 6:26 PM > To: wdmaudiodev@xxxxxxxxxxxxx > Subject: [wdmaudiodev] Re: sample rate control on Vista > > Is this API documented anywhere yet? > > Jeff > > ----- Original Message ----- > From: "Hakon Strande" <hakons@xxxxxxxxxxxxxxxxxxxxx> > To: <wdmaudiodev@xxxxxxxxxxxxx> > Sent: Tuesday, July 18, 2006 9:51 AM > Subject: [wdmaudiodev] Re: sample rate control on Vista > > > > Windows Audio Session API > > > > The Vista low level audio APIs > > > > HakonS > > > > -----Original Message----- > > From: wdmaudiodev-bounce@xxxxxxxxxxxxx > > [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Stephen Turner > > Sent: Monday, July 17, 2006 4:47 PM > > To: wdmaudiodev@xxxxxxxxxxxxx > > Subject: [wdmaudiodev] Re: sample rate control on Vista > > > >>>3. However, if an app uses the new WASAPI API in exclusive mode > > What the heck is WASAPI?. > > ------------------------ > > Stephen Turner > > AudioScience, Inc. > > www.audioscience.com > > > > ----- Original Message ----- > > From: "Dugan Porter" <duganp@xxxxxxxxxxxxxxxxxxxxx> > > To: <wdmaudiodev@xxxxxxxxxxxxx> > > Sent: Monday, July 17, 2006 4:40 PM > > Subject: [wdmaudiodev] Re: sample rate control on Vista > > > > > > Hi Nikolay. Here's a multi-part answer for you: > > > > 1. There is no programmatic way for an app to set the mmsys.cpl capture > > rate, because the Vista philosophy is that no audio app can make > > configuration changes that affect any other apps. The setting in > > mmsys.cpl > > is only meant to be changed by the user. > > > > 2. If an app uses the legacy APIs (waveIn and DirectSoundCapture) to > > capture > > audio at a rate other than mmsys.cpl's, the system will convert from the > > mmsys.cpl rate to the app's requested rate using a sample rate > > converter. > > > > 3. However, if an app uses the new WASAPI API in exclusive mode (by > > using > > the AUDCLNT_SHAREMODE_EXCLUSIVE flag), it can open the device in any > > format > > supported by the driver, and no SRC will be used. The downside is that > > no > > other app will be able capture audio. > > > > 4. If you need to use a legacy API, you can at least *discover* the > > system > > capture rate setting using the new Vista APIs, and then capture at that > > rate, to avoid the SRC; however this doesn't let you *control* the rate. > > > > Hope that helps - > > Dugan Porter - Game Audio Team - Microsoft > > This posting is provided "as is" with no warranties, and confers no > > rights > > > > > > -----Original Message----- > > From: wdmaudiodev-bounce@xxxxxxxxxxxxx > > [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Nikolay V. > > Pyatkov > > Sent: Sunday, July 16, 2006 3:22 PM > > To: wdmaudiodev@xxxxxxxxxxxxx > > Subject: [wdmaudiodev] sample rate control on Vista > > > > Hi, > > > > We have an input only WDM portcls audio driver on Vista 5456. The driver > > can > > support 48,000 and 44,100 sample rate. The application needs to open > > this > > driver at 48,000. Here is the code: > > > > WAVEFORMATEX wf; > > wf.wFormatTag = WAVE_FORMAT_PCM; > > wf.nChannels = 2; > > wf.nSamplesPerSec = 48000; > > wf.nAvgBytesPerSec = 192000; > > wf.nBlockAlign = nBlockAlign; > > wf.wBitsPerSample = UCODEC_BIT_PER_SAMPLE_PCM; > > wf.cbSize = 0; > > > > mmResult = waveInOpen( > > &m_hWaveIn, > > nInputDeviceId, > > &m_WaveFormat, > > (DWORD_PTR)m_hWaveInEvent, > > 0, > > CALLBACK_EVENT); > > > > mmResult is 0. > > > > But the trace in the driver shows: > > > > 00000431 9.63108540 ValidatePcm : > > 00000432 9.63109016 ---- cbSize = 22 > > 00000433 9.63109398 ---- nChannels = 2 > > 00000434 9.63109875 ---- nSamplesPerSec = 44100 > > 00000435 9.63110352 ---- wBitsPerSample = 16 > > > > The Vista audio subsystem took the parameters from "Audio > > Devices->Recording->My Device->Properties->Options" .If I manually > > modify > > value in the Options panel Vista will use the value to open my device. > > > > I tried to check/uncheck "exclusive control" box. Does not help. How do > > I > > get > > control over the bit rate back to the application? > > > > Thanks, > > Nikolay > > > > > > > > > > > > > > > > > > ****************** > > > > WDMAUDIODEV addresses: > > Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx > > Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe > > Unsubscribe: > > mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe > > Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx > > > > URL to WDMAUDIODEV page: > > http://www.wdmaudiodev.com/ > > > > > > ****************** > > > > WDMAUDIODEV addresses: > > Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx > > Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe > > Unsubscribe: > > mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe > > Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx > > > > URL to WDMAUDIODEV page: > > http://www.wdmaudiodev.com/ > > > > > > > > ****************** > > > > WDMAUDIODEV addresses: > > Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx > > Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe > > Unsubscribe: > > mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe > > Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx > > > > URL to WDMAUDIODEV page: > > http://www.wdmaudiodev.com/ > > > > > > ****************** > > > > WDMAUDIODEV addresses: > > Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx > > Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe > > Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe > > Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx > > > > URL to WDMAUDIODEV page: > > http://www.wdmaudiodev.com/ > > > > > > ****************** > > WDMAUDIODEV addresses: > Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx > Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe > Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe > Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx > > URL to WDMAUDIODEV page: > http://www.wdmaudiodev.com/ ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx URL to WDMAUDIODEV page: http://www.wdmaudiodev.com/ ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx URL to WDMAUDIODEV page: http://www.wdmaudiodev.com/