Hello Dylan,
endpoint info and re-populate everything from scratch?
Unfortunately, the only reliable way is to uninstall and reinstall the
device. A less reliable way is to restart Windows.
The caching problem was already discussed here several times.
MS representatives believe that this uncontrollable caching is the
...
[wdmaudiodev] Re: Audio driver issues, No speakers or headphones are plugged in.
↧
↧
[wdmaudiodev] Re: USB MIDI multi-client driver creation
The problem is that the current generic windows MIDI driver does not
provide multi-client capability so I decided to try and create mine
...
↧
[wdmaudiodev] Re: USB MIDI multi-client driver creation
The problem is that the current generic windows MIDI driver does not
provide multi-client capability so I decided to try and create mine
Στις Τετ 8 Νοε 2023 στις 5:04 μ.μ., ο/η Radosław Pietrzyk
radoslaw.pietrzyk@xxxxxxxxx έγραψε:
create a new one ?
śr., 8 lis 2023 o 15:13 Nikos Terzis nikosterzis08@xxxxxxxxx napisał(a):
...
↧
[wdmaudiodev] Re: [EXTERNAL] Re: Audio driver issues, No speakers or headphones are plugged in.
If you are developing a driver and swap out the driver binary without going
through an uninstall and reinstall process, then the mmdevice cache can go out
of sync with the driver capabilities.
The simplest way to remove all of the mmdevice entries is to uninstall the
driver and reinstall. This solution has the benefit of also deleting any values
stored directly on the PNP interfaces for the driver. When a driver implements
controls for volume, mute, treble, bass, midrange, loudness, or agc, the last
set values for these controls are stored on the PNP interface, not on the
mmdevice. So, the best way to clear all persisted values, mmdevice and PNP
...
↧
[wdmaudiodev] Re: [EXTERNAL] Re: Audio driver issues, No speakers or headphones are plugged in.
Fantastic information, thank you! I did manually uninstall and reinstall
the device many times, but it was leaving all of the keys under
MMDevices\Audio\Render related to it regardless. The PNP device that the
audio driver attaches to is actually created by a different driver (a
filter driver on top of the WDDM driver for the GPU's video display - there
are three separate drivers involved here; it's a mess, I know!), and even
completely uninstalling all devices from the ground up left the audio keys
there. Completely wiping the Render keys as described seems to have finally
forced it to re-update. It's still broken, but at least I know that it's
not broken because of this!
...
↧
↧
[wdmaudiodev] Re: [EXTERNAL] Re: USB MIDI multi-client driver creation
Before going too far on the legacy MIDI implementation, you should be aware of
where MIDI is going on Windows.
For MIDI 2.0 we are collaborating with AMEI and
AmeNote
on developing a new USB MIDI 2.0 driver which supports both USB MIDI 1.0 and
MIDI 2.0 peripherals. We're also creating a new DDI for MIDI drivers which
replaces the KS implementation that performs an IOCTL to send and receive MIDI
messages (extremely slow) with a memory mapped buffer and eventing, similar to
what is used by WaveRt for audio. In preliminary testing we're seeing
...
↧
[wdmaudiodev] Re: Audio driver issues, No speakers or headphones are plugged in.
From what I've read, Foobar2000 has included KS support built-in since
2009. In the output devices, I can select mine in exclusive mode which I
assume is directly connecting to the KS pin? There are no explicit options
I've been able to find indicating exactly how it's outputting the audio,
but I can't imagine this device in exclusive mode isn't a direct
connection.
I'll look around for some other programs that are more explicit about
exactly how they're connecting to the device, or maybe I'll write something
myself so I know for sure.
...
↧
[wdmaudiodev] Re: [EXTERNAL] Re: USB MIDI multi-client driver creation
[heart] Pete Brown (WINDOWS) reacted to your message:
________________________________
From: wdmaudiodev-bounce@xxxxxxxxxxxxx wdmaudiodev-bounce@xxxxxxxxxxxxx on
behalf of Gary Daniels dmarc-noreply@xxxxxxxxxxxxx
Sent: Wednesday, November 8, 2023 5:41:14 PM
To: wdmaudiodev@xxxxxxxxxxxxx wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: [EXTERNAL] Re: USB MIDI multi-client driver creation
Before going too far on the legacy MIDI implementation, you should be aware of
where MIDI is going on Windows.
...
↧
[wdmaudiodev] Re: [EXTERNAL] Re: Audio driver issues, No speakers or headphones are plugged in.
Ahh, yes. Uninstalling will delete the mmdevice keys for every endpoint type
but HDMI and DisplayPort.
AudioEndpointBuilder deletes the audio endpoint data when the PNP interface is
removed from the system. When typical audio drivers are updated the new driver
is installed on top of the old driver, leaving the old driver in the PNP driver
store and never removing the PNP interfaces.
HDMI is special because display driver update packages often perform an
uninstall and reinstall of the display and display audio drivers as part of the
...
↧
↧
[wdmaudiodev] Re: [EXTERNAL] Re: USB MIDI multi-client driver creation
Could you provide me with some instructions on how to implement the driver
in order to have multi-client capability? Is there any video?
I already have Test Signing on on my machine
Στις Τετ 8 Νοε 2023 στις 7:41 μ.μ., ο/η Gary Daniels
dmarc-noreply@xxxxxxxxxxxxx έγραψε:
aware of where MIDI is going on Windows.
...
↧
[wdmaudiodev] Re: [EXTERNAL] Re: USB MIDI multi-client driver creation
It looks to me that you have no bloody idea what you are trying cope with...
śr., 8 lis 2023 o 20:44 Nikos Terzis nikosterzis08@xxxxxxxxx napisał(a):
in order to have multi-client capability? Is there any video?
I already have Test Signing on on my machine
Στις Τετ 8 Νοε 2023 στις 7:41 μ.μ., ο/η Gary Daniels
dmarc-noreply@xxxxxxxxxxxxx έγραψε:
...
↧
[wdmaudiodev] Re: [EXTERNAL] Re: Audio driver issues, No speakers or headphones are plugged in.
That makes a lot of sense, since yes this is presenting as an HDMI audio
output. I'll actually try changing it to be standard speakers, maybe
there's something going on between the fact that there's a WDDM driver and
this separate HDMI interface audio driver that's causing problems?
FWIW, the driver stack I'm using has a WDF filter driver above the WDDM
display-only driver. The WDF filter creates a new PDO for the audio device,
and a third driver is attached to that PDO to handle the audio. This setup
is required because my toy GPU doesn't actually support all the hardware
features required for a full WDDM driver (no programmable shading support),
...
↧
[wdmaudiodev] Re: [EXTERNAL] Re: USB MIDI multi-client driver creation
Well, can you help me? Provide me with some links to read on how to start
maybe?
Στις Τετ 8 Νοε 2023 στις 9:51 μ.μ., ο/η Radosław Pietrzyk
radoslaw.pietrzyk@xxxxxxxxx έγραψε:
with...
śr., 8 lis 2023 o 20:44 Nikos Terzis nikosterzis08@xxxxxxxxx napisał(a):
...
↧
↧
[wdmaudiodev] Re: [EXTERNAL] Re: USB MIDI multi-client driver creation
Are you guys confusing this board with an instant messaging service?
Well, can you help me? Provide me with some links to read on how to start
maybe?
Στις Τετ 8 Νοε 2023 στις 9:51 μ.μ., ο/η Radosław Pietrzyk
radoslaw.pietrzyk@xxxxxxxxx
...
↧
[wdmaudiodev] Re: [EXTERNAL] Re: USB MIDI multi-client driver creation
No, I just asked about where to start that is it. Why would we use it as an
instant messaging service?
Στις Τετ 8 Νοε 2023 στις 9:57 μ.μ., ο/η Harasemiuc Andrei
andrei.harasemiuc@xxxxxxxxx έγραψε:
On 8 Nov 2023, at 21:55, Nikos Terzis nikosterzis08@xxxxxxxxx wrote:
...
↧
[wdmaudiodev] Re: [EXTERNAL] Re: USB MIDI multi-client driver creation
At this point, are you still asking about writing a new driver, or are you
asking how to install the upcoming Windows MIDI Services MIDI 2.0 driver and
service?
If the latter, please understand that that driver, service, and API work
together, and although the work is planned, it does not currently work with the
older winmm MIDI API at all. It's a developer preview, not for customers, like
Gary said. We'll have a new developer preview out later this month, but again,
it won't work with the applications you have installed today.
...
↧
[wdmaudiodev] Re: Audio driver issues, No speakers or headphones are plugged in.
On Wed, 8 Nov 2023 at 17:43, Dylan Barrie dylan.barrie@xxxxxxxxx wrote:
In the output devices, I can select mine in exclusive mode which I assume is
directly connecting to the KS pin? There are no explicit options I've been
able to find indicating exactly how it's outputting the audio, but I can't
imagine this device in exclusive mode isn't a direct connection.
You need the foo_out_ks plug-in to use Kernel Streaming in foobar2000.
Exclusive mode refers to WASAPI Exclusive which is still at least
one layer removed from KS.
...
↧
↧
[wdmaudiodev] Re: [EXTERNAL] Re: USB MIDI multi-client driver creation
Nikos Terzis wrote:
No, I just asked about where to start that is it. Why would we use it
as an instant messaging service?
He was being sarcastic, because you have had 9 messages in one day.
Did you read the web site where it says *There are no usable builds,
currently. ?*
...
↧
[wdmaudiodev] Re: Audio driver issues, No speakers or headphones are plugged in.
Ah, gotcha. Sorry, I was clearly being quite dense there!
I'm now using that Virtual Audio Cable tool by the guy who made Audio
Repeater KS, and coupled with an audio player that lets me target the
virtual audio cable, I think I've got it configured to directly talk to my
WaveRT's render pin; playback through a program that lets me specify the
VAC as the output device, and then using Repeater KS to connect the other
end of the VAC directly to my WaveRT instance. Given that it's showing the
name of the WaveRT instance and not the name of the device in Repeater, I'm
pretty certain that it's now configured in a way that will have the VAC
...
↧
[wdmaudiodev] Re: Audio driver issues, No speakers or headphones are plugged in.
Hello Dylan,
2009.
Maybe KS plugin was included in some distribution packages, but now it
isn't added to the standard package. To use KS, you need to download
the plugin (component):
...
↧
[wdmaudiodev] Re: Audio driver issues, No speakers or headphones are plugged in.
Hi Eugene, that's exactly what I'm doing now (see the details of the last
email I sent to the thread), and it is working!
When I use Audio Repeater KS plus a virtual audio cable (great tools, by
the way!), I get all the all the expected callbacks to my WaveRT instance.
It doesn't seem to be using event-based processing (it never makes calls to
register any notification events, and I get calls to GetPosition instead),
but it does write audio to the buffer and I can successfully DMA that data
to my hardware and get audio playing through it. I actually spent a good
few minutes thinking the odd chime I was suddenly hearing was coming from
...
↧
↧
[wdmaudiodev] Re: Audio driver issues, No speakers or headphones are plugged in.
Hello Dylan,
register any notification events
For some reason I don't understand, PortCls restricts the maximum value of
NotificationCount (the number of packets) to 2, returning an error for
greater values, so Audio Repeater doesn't use event notification mode
if the number of buffers is different from two. If you change Buffer
parts to 2, you will see NU (notifications used) in Modes field,
...
↧
[wdmaudiodev] Virtual microphone driver which receives audio data from user mode app
Hello??
I want to develop a virtual microphone driver which receives audio data from my
user mode app. The virtual microphone can be used by video conferencing app
like Teams.
I reference a github project: nbsp;
It is a WDM based Virtual Audio Device Driver and can be used as an Audio
Loopback Device. nbsp; I think this project is modified according to Microsoft
...
↧
[wdmaudiodev] Default Audio Format after Driver Installation ?
Hello,
This year, we have built new audio driver for Win10/11 from the SYSVAD example,
and when we install it
1. The default format for the playback device is 48kHz 24 bit Stereo
...
↧
[wdmaudiodev] Re: Default Audio Format after Driver Installation ?
Hi Vincent,
All is done in the PKEY_AudioEngine_OEMFormat which can be set in the .INF
file as :
;; Default Format : S24_LE@48kHz/STEREO.
HKR, EP\\0 , %PKEY_AudioEngine_OEMFormat%,
%REG_BINARY%,41,00,00,00,28,00,00,00,FE,FF,02,00,80,BB,00,00,00,DC,05,00,08,00,20,00,16,00,18,00,03,00,00,00,01,00,00,00,00,00,10,00,80,00,00,AA,00,38,9B,71
You can check
...
↧
↧
[wdmaudiodev] Re: Default Audio Format after Driver Installation ?
Of course we have tried this, but it does not work.
The default format is always 44.1kHz for recording pin after installation.
Also in the driver code, we are already defining default format, but it’s not
taken in account.
...
↧
[wdmaudiodev] Re: [EXTERNAL] Re: Default Audio Format after Driver Installation ?
It's ultimately up to the Windows audio engine what format it chooses as the
default, but there are various things a driver developer can do to influence
that choice.
The most foolproof method to force a default is to support only one format
From: wdmaudiodev-bounce@xxxxxxxxxxxxx wdmaudiodev-bounce@xxxxxxxxxxxxx On
Behalf Of VB-Audio
Sent: Thursday, January 11, 2024 7:46 AM
To: wdmaudiodev@xxxxxxxxxxxxx
...
↧
[wdmaudiodev] Re: [EXTERNAL] Re: Default Audio Format after Driver Installation ?
Is there any publication for the algorithm used by the audio engine?
...
↧
[wdmaudiodev] Re: [EXTERNAL] Re: Default Audio Format after Driver Installation ?
Hello Vincent, Colleagues,
in accordance to investigations I did previously under Win 11 you may need
also to implement getter for KSPROPSETID_Pin /
KSPROPERTY_PIN_PROPOSEDATAFORMAT (in addition to
KSPROPERTY_PIN_PROPOSEDATAFORMAT2). From the top of my head I've
implemented these 2 getters in a similar way. At that time I've tested w/
Mediaplayer (render path) and Win audio recorder (capture path) apps. For
Mediaplayer (render path) it was sufficient to implement
KSPROPERTY_PIN_PROPOSEDATAFORMAT2. Stream got the expected default buffer
...
↧
↧
[wdmaudiodev] Re: [EXTERNAL] Re: Default Audio Format after Driver Installation ?
Hello,
Thanks all for your different replies…
We have implemented the KSPROPERTY_PIN_PROPOSEDATAFORMAT2 (will see if it
brings some benefit…).
...
↧
[wdmaudiodev] Re: [EXTERNAL] Re: Default Audio Format after Driver Installation ?
Yes, that’s correct, PKEY_AudioEngine_OEMFormat is
{E4870E26-3CC5-4CD2-BA46-CA0A9A70ED04},3 and setting it in the .inf is a
supported way for audio driver vendors to influence the default format
selection.
There’s a sample here:
PKEY_AudioEngine_OEMFormat
{E4870E26-3CC5-4CD2-BA46-CA0A9A70ED04},0 is a private property key that Windows
uses internally. Setting this key leads to undefined behavior and is not
...
↧
[wdmaudiodev] VAD Loopback Pin ignored by Audio Engine
Hello,
I added loopback pin in a simple Virtual Audio Device wave filter, and it works
as expected when client applications are capturing the speaker endpoint data
using basic WASAPI's IMMDevice::Activate, i.e. loopback stream is initiated,
and driver provides data requested. However, when clients invoke
ActivateAudioInterfaceAsync with activation type loopback and target process Id
(as in Application loopback audio capture - Code Samples) VAD driver's loopback
pin is ignored, no stream associated with loopback pin originates.
Could you tell me, am I missing something in my driver or Windows Audio Engine
takes another path by design?
...
↧
[wdmaudiodev] Re: [EXTERNAL] VAD Loopback Pin ignored by Audio Engine
Application loopback grabs the sound played by a particular application.
There's also speaker loopback which is the mixed sound played by all
applications, and the system itself, to a particular playback device. The
loopback pin, if present, should be used for speaker loopback, but application
loopback is always provided by the Windows audio engine
From: wdmaudiodev-bounce@xxxxxxxxxxxxx wdmaudiodev-bounce@xxxxxxxxxxxxx On
Behalf Of Sedrak Arakelyan
Sent: Thursday, January 18, 2024 3:31 PM
To: wdmaudiodev@xxxxxxxxxxxxx
...
↧
↧
[wdmaudiodev] Re: [EXTERNAL] VAD Loopback Pin ignored by Audio Engine
Thanks for the feedback, Matthew!Does it mean that audio device can't have any
control on its endpoint's application loopback by design? Even if it has
implemented KSPROPERTY_AUDIOENGINE_LOOPBACK_PROTECTION in
KSPROPSETID_AudioEngine property set or anything else?
Thank you,Sedrak
On Monday, January 22, 2024 at 10:28:20 PM GMT+4, Matthew van Eerde
dmarc-noreply@xxxxxxxxxxxxx wrote:
Application loopback grabs the sound played by a particular application.
...
↧
[wdmaudiodev] Re: [EXTERNAL] VAD Loopback Pin ignored by Audio Engine
What do you want to do with the loopback?
From: wdmaudiodev-bounce@xxxxxxxxxxxxx wdmaudiodev-bounce@xxxxxxxxxxxxx On
Behalf Of Sedrak Arakelyan
Sent: Tuesday, January 23, 2024 9:12 AM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: [EXTERNAL] VAD Loopback Pin ignored by Audio Engine
Thanks for the feedback, Matthew!
Does it mean that audio device can't have any control on its endpoint's
...
↧
[wdmaudiodev] Re: [EXTERNAL] VAD Loopback Pin ignored by Audio Engine
Let me describe the whole picture in this case.
We have implemented VAD device whose endpoints could selected by various
meeting applications. Our user mode application captures audio on real
microphone, cleans the noise, etc. and delivers to VAD mic endpoint which is
selected by communication application. The reverse order is implemented for
speaker, i.e.: VAD speaker gets the audio stream, our application retrieves the
data, processes it and delivers to an available physical speaker.
When communication applications (for instance MS Teams) share screen content
along with audio, on the other meeting end, two audio streams one for VAD's
another for real speaker could be heard. Thus, we suspected that meeting
...
↧
[wdmaudiodev] Continued issues with No speakers or headphones are plugged in
I posted about this a few months ago, and have been trying to resolve it
off-and-on since then. I've gotten to the point where I think I've tried
everything I'm able to do, and I'm still quite stuck. Any advice would be
greatly appreciated, as this is the last piece of the puzzle before the
project I'm working on is finished.
To keep it simple, I'm trying to write a WDM audio driver that allows audio
to be played through a custom hardware GPU I've developed. The hardware
works, and my WDM driver also works if I use a tool that can manually
specify the KS endpoint and forcefully stream audio to it. The only issue
...
↧
↧
[wdmaudiodev] SYSVAD not compatible with Windows 10 LTSC 1809 or 1909
Hello,
It seems Windows 10 LTSC 1809 or 1909 does not support ExAllocatePool2 function
!?!
But this is not the only problem: When we install our new driver based on
...
↧
[wdmaudiodev] Re: SYSVAD not compatible with Windows 10 LTSC 1809 or 1909
?
From: wdmaudiodev-bounce@xxxxxxxxxxxxx wdmaudiodev-bounce@xxxxxxxxxxxxx On
Behalf Of VB-Audio
Sent: 29 January 2024 09:40
To: wdmaudiodev@xxxxxxxxxxxxx
Cc: 'Gary Daniels' Gary.Daniels@xxxxxxxxxxxxx ; 'Matthew van Eerde (^_^)'
...
↧
[wdmaudiodev] Re: SYSVAD not compatible with Windows 10 LTSC 1809 or 1909
VB-Audio wrote:
It seems Windows 10 LTSC 1809 or 1909 does not support ExAllocatePool2
function !?!
But this is not the only problem: When we install our new driver based
on current SYSVAD example, Windows 10 LTSC 1809 or 1909 cannot start it:
...
↧
[wdmaudiodev] WaveRT output stream driver architecture
After realizing that the sysvad driver did work correctly and then spending
a few days going line-by-line to figure out what was different between it
and my driver, I finally realized that mine was failing due to my
implementation of GetHWLatency setting non-zero values for any of the
parameters. I'm still a bit perturbed that the result of that was for the
OS to tell me that I didn't have speakers or headphones plugged into the
HDMI port, but that's neither here nor there. I'm finally able to start
moving data between the OS and my hardware, and getting audio playing. I've
got stuff playing, but it's massively distorted, over/underflowing, and I
think I may be misunderstanding how the architecture is meant to behave
...
↧
↧
[wdmaudiodev] HLK - KS Topology Test problem
Hi all,
I'm trying to get a virtual audio driver through the HLK process so we can
get it WHQL certified.
Most of the HLK tests are passing, but we're having problems with the KS
Topology test - two errors in particular:
Node[0] (KSNODETYPE_PEAKMETER) incorrectly supports deprecated
KSPROPERTY_AUDIO_PEAKMETER
...
↧
[wdmaudiodev] Re: HLK - KS Topology Test problem
On 2/10/24 2:31 PM, Andrew Dancy wrote:
I'm trying to get a virtual audio driver through the HLK process so we
can get it WHQL certified.
Why?
...
↧
[wdmaudiodev] Re: SYSVAD not compatible with Windows 10 LTSC 1809 or 1909
OK!
All problems disappear if there is no more reference to ExAllocatePool2 in our
sys file.
Thanks
...
↧
[wdmaudiodev] Re: HLK - KS Topology Test problem
can get it WHQL certified.
Why?
trying to persuade them it's completely unnecessary but at the moment it's
still a requirement.
...
↧
↧
[wdmaudiodev] Re: HLK - KS Topology Test problem
submissions? That's assuming I can even find the download, as MS appear to
have scrubbed it from their website.
This?
...
↧
[wdmaudiodev] Re: HLK - KS Topology Test problem
On 2/12/24 8:06 AM, Andrew Dancy wrote:
I'm trying to get a virtual audio driver through the HLK process
so we
can get it WHQL certified.
Why?
...
↧
[wdmaudiodev] Re: HLK - KS Topology Test problem
That's HLK which is what we're having some issues getting tests to pass -
...
↧
[wdmaudiodev] How to enable Swap APO in SYSVAD sample driver without enhancement tab in windows 11?
For the past few weeks, we've been working with the SYSVAD sample driver.
We cloned the SYSVAD driver and successfully installed it on our target
machine. However, we've noticed that it's not a real driver meant for
actual hardware; it's a virtual driver. This means it can't handle actual
playback audio or record audio from the microphone. When we capture the
output of the SYSVAD speaker, we see a sine wave because SYSVAD generates a
sine wave for playback. The actual audio played is taken from the loopback
and saved with the name STREAM_HOSTxxx.wav.
...
↧
↧
[wdmaudiodev] Re: How to enable Swap APO in SYSVAD sample driver without enhancement tab in windows 11?
I've worked with sysvad in the past. I needed to build a POC that capture
system audio buffers.
Thank God the project was dropped.
Be ready to lose some good sleeping nights.
Only MS engineers and some few engineers (one for instance) know the
intricacies of that,
forget the first option, the second option depends on the engineer's mood.
Maybe
your company should contract him, will be cheaper for sure.
...
↧
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