Hi,
I have a virtual audio device driver based on MSVAD Simple. It works
pretty well, but I start experiencing the problem on Windows 10. I don't
know if this was the issue before the Anniversary Update as all of my
Windows 10 machines got updated already, but it is definitely works
another way in Windows 7.
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[wdmaudiodev] Unexpected default sound device on Windows 10
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[wdmaudiodev] Re: Windows 7 wave cyclic driver
OnTue,2017-02-28at17:19-0800,TimRobertswrote:
notsupportDMAandusesaFIFOforcaptureandplayback.Inthe
IDmaChannel::CopyFrommethod,thedataisreadfromtheFIFOaddress
(storedinmCodecBase)intotheDestinationbufferbutIjustget
garbageinthewavefilesavedbytheapplication.
Areyouabsolutelysurethatyou'redeliveringtherightformat?Howdo
youknow?Doyounegotiateaformat,ordidyoufixittojustone?
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[wdmaudiodev] Re: Windows 7 wave cyclic driver
Haveyoutriedusingaknownpatternlikeasinetableinsteadofdatafrom
yourhardware'sfifo?Providedyougeneratethethetableintheproperformat
andgetsomerecognizableaudio,thatwilltellyouifeverythingaboveis
workingasyouexpect.Ifnot,adjusttheendianess/byteordering/
generationofyourtestdatauntilyougetsomethingyourecognizeout.
SentfrommyiPhone
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[wdmaudiodev] Re: Unexpected default sound device on Windows 10
Youcansetthispropertyinyour.inftomakeyouraudiodeviceineligibleto
bedefault.
PKEY_AudioDevice_NeverSetAsDefaultEndpoint
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[wdmaudiodev] Re: Windows 7 wave cyclic driver
Yes,Itriedusing0xdeadbeefbutitwasnotfoundinthefilesavedby
theaudioclient.
OnWed,2017-03-01at07:51-0800,WadeDawsonwrote:
yourhardware'sfifo?Providedyougeneratethethetableintheproper
formatandgetsomerecognizableaudio,thatwilltellyouifeverything
aboveisworkingasyouexpect.Ifnot,adjusttheendianess/byteordering
/generationofyourtestdatauntilyougetsomethingyourecognizeout.
...
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[wdmaudiodev] Re: Windows 7 wave cyclic driver
FarrahAvanesovwrote:
Areyouabsolutelysurethatyou'redeliveringtherightformat?Howdo
youknow?Doyounegotiateaformat,ordidyoufixittojustone?
applicationhasthecorrectwaveformat.
WhatImeanisthattheAudioEnginewillnegotiateaformatwithyour
driver.ThedefaultMSVADdriverofferstosupporteitherPCM8or
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[wdmaudiodev] Re: Windows 7 wave cyclic driver
OnWed,2017-03-01at10:10-0800,TimRobertswrote:
reallywant,thenitshouldbeOK.
Yes,I'vemodifiedmsvadtouse48kHzonly.
reporthowmanybytesyouactuallycopied.Iftheportdriverasksyou
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[wdmaudiodev] Re: Windows 7 wave cyclic driver
Theadvantageofusingasinewave(asopposedtoasentinelvaluelike
0xdeadbeef)isthatsinewavestendtoberesilienttoaudioprocessing
(changingfrominttofloat,dynamicrangecompressionetc.)butsentinel
valuesareveryfragile.
From:FarrahAvanesov
Sent:Wednesday,March1,201710:28AM
To:wdmaudiodev@xxxxxxxxxxxxx
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[wdmaudiodev] Re: Windows 7 wave cyclic driver
OnWed,2017-03-01at18:29+0000,MatthewvanEerdewrote:
like0xdeadbeef)isthatsinewavestendtoberesilienttoaudio
processing(changingfrominttofloat,dynamicrangecompression
etc.)butsentinelvaluesareveryfragile
Iusedthefollowingsinewave:
0x8000,0xda82,0xffff,0xda82,0x8000,0x257d,0x0,0x257d
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[wdmaudiodev] Re: Windows 7 wave cyclic driver
WhatWAVEFORMATEXisbeingpassedtoyourNewStreamimplementation,andwhat
WAVEFORMATEXisinthe“fmt”chunkofthecaptured.wavfile?
From:FarrahAvanesov
Sent:Wednesday,March1,201711:53AM
To:wdmaudiodev@xxxxxxxxxxxxx
Cc:timr@xxxxxxxxx
Subject:[wdmaudiodev]Re:Windows7wavecyclicdriver
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[wdmaudiodev] Re: Windows 7 wave cyclic driver
OnWed,2017-03-01at19:59+0000,MatthewvanEerdewrote:
andwhatWAVEFORMATEXisinthe“fmt”chunkofthecaptured.wav
file?
FromWinDbg:
[TestDataFormat]PCMEX-Frequency:48000,Channels:2,bps:16,
ChannelMask:3
fmtsub-chunkfrom.wavfile:
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[wdmaudiodev] Re: Windows 7 wave cyclic driver
OK,soyou’reprovidingstereo16-bit48kHzdatatoWindows;Windowsis
convertingthistostereofloating-point48kHzinternallyintheWindowsaudio
engine;thenconvertingitagaintostereo16-bit44.1kHzwhenhandingitto
theapp.
Allthisisperfectlynormal,thoughIwonderwhytheappaskedfor44.1kHz
specifically.
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[wdmaudiodev] Re: Unexpected default sound device on Windows
HiMatthew,
Thank you for your advise, but unfortunately this property has no any
effect. Here is a snippet of my INF file:
[MP4RecorderVAD.Interfaces]
AddInterface=%KSCATEGORY_AUDIO%,%KSNAME_Wave%,MP4RecorderVAD.I.Wave
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[wdmaudiodev] Re: Unexpected default sound device on Windows
DoestheNeverSetAsDefaultpropertyshowuponyourendpointifyourunthis
tool?
PrintersandDevicesgroupseverythingbythe“ContainerID”property.There
shouldbeacontainerwiththesamenameasyourcomputer.Ifyoudouble-click
thisandclickonthe“Hardware”tabyoushouldseeallthebuilt-indevices,
includingtheRealtekaudiodevice.
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[wdmaudiodev] Re: Unexpected default sound device on Windows
Itexists,seetheonelinebeforelastinthefollowingquote:
ID:{0.0.0.00000000}.{99839eef-62fa-4442-90fb-905add325020}
State:1(DEVICE_STATE_ACTIVE)
--Properties(36)--
.....
{b3f8fa53-0004-438e-9003-51a46e139bfc},6: VT_LPWSTR MP4 Recorder
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[wdmaudiodev] Re: Unexpected default sound device on Windows
I've compiled the pure MSVAD simple driver and it also has such a
behavior - it gets set as default right after installation.
I've made tests with USB Audio stick - Windows doesn't remember it as a
default sound device. When it's plugged in it is necessary to set is as
default manually.
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[wdmaudiodev] Re: Unexpected default sound device on Windows
Canyoufilea“problemreport”showingthecasewherethe“neversetas
default”propertyisset,buttheendpointisthedefaultanyway?
Thatshouldgrabsomeusefullogs.
From:RomanKudinov
Sent:Friday,March3,20172:54AM
To:wdmaudiodev@xxxxxxxxxxxxx
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[wdmaudiodev] Re: Unexpected default sound device on Windows
Filed the problem report. I used unsigned developer version of the
driver. If you'd like me to perform the same operations with the signed
driver, then please let me know.
03.03.2017 19:27, Matthew van Eerde (Redacted sender Matthew.van.Eerde
for DMARC) пишет:
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[wdmaudiodev] Re: Unexpected default sound device on Windows
Thanks.Canyoushareadirectlinktotheproblemreportwithme,justsoit
doesn’tgetlostinthenoise?
From:RomanKudinov
Sent:Friday,March3,20171:44PM
To:wdmaudiodev@xxxxxxxxxxxxx
Subject:[wdmaudiodev]Re:UnexpecteddefaultsounddeviceonWindows
Filedtheproblemreport.Iusedunsigneddeveloperversionofthedriver.If
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[wdmaudiodev] Re: Unexpected default sound device on Windows
On 04.03.2017 00:55, Matthew van Eerde (Redacted sender
Matthew.van.Eerde for DMARC) wrote:
Thanks. Can you share a direct link to the problem report with me,
just so it doesn’t get lost in the noise?
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