[wdmaudiodev] Re: Which Audio App can handle 6 channel out
- From: "Thomas Zepf" <thzepf@xxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Wed, 11 Sep 2002 17:11:28 +0200
Hi Mitch,
thangs for the answer. I checked MCStream with my hw under
98SE and XP but got very strange results.
My hw can operate at 24 bit 4 channel and 16 bit 6 channel mode.
First I select 16 bit 6 channel mode and used MCStream to pass
the streams to my hw. This is working as expected eg sine tones
on all channels.
But when I look at my I2S data lines with a scope I can clearly see
that usb is passing 24 changing audio bits ! very strange
Next I selected my 24 bit 4 channel mode. Using MCStream with
4 channels at 16 bit shows the correct result as above.
After that I used 24 bit resolution in MCStream and got noise only.
My I2S lines show 24 bit but with a phase difference between
LR Clk and I2Sdata. So no wonder that I am hearing noise.
BTW: I got the noise also with my TerraTec DMX6Fire. It seems that
there still exists the old 24 bit bug !?
Cheers Thomas
----- Original Message -----
From: Mitchell Rundle <mitchr@xxxxxxxxxxxxx>
To: <wdmaudiodev@xxxxxxxxxxxxx>
Sent: Monday, September 09, 2002 7:15 PM
Subject: [wdmaudiodev] Re: Which Audio App can handle 6 channel out
>
> For testing purposes, you can use the Windows XP DDK utility MCStream,
> which streams n-channel WAVEFORMATEXTENSIBLE streams to the device. You
> can also create extensible format wave files using the SDK sample
> Multichan.
>
> Regards,
> Mitch
>
> This posting is provided "AS IS" with no warranties, and confers no
> rights.
>
> -----Original Message-----
> From: Mike Shonle [mailto:mshonle@xxxxxxxxxxxx]=20
> Sent: Monday, September 09, 2002 8:15 AM
> To: wdmaudiodev@xxxxxxxxxxxxx
> Subject: [wdmaudiodev] Re: Which Audio App can handle 6 channel out
>
>
>
> Try Cakewalk Sonar 2.0. www.cakewalk.com They have a demo version
> available. Note that Sonar uses Kernel Streaming
> mode, so it would be a good test of that.
>
>
> ----- Original Message -----
> From: "Thomas Zepf" <thzepf@xxxxxxxxxxx>
> To: <wdmaudiodev@xxxxxxxxxxxxx>
> Sent: Monday, September 09, 2002 9:48 AM
> Subject: [wdmaudiodev] Which Audio App can handle 6 channel out
>
>
> >
> > I am designing a usb device which is able to play 6 audio channels at=20
> > the same time. (through one EP) The device is properly recognized by=20
> > WIN and grapher shows that it supports 6 channels =
> (MaximumChannels=3D6)
> >
> > Up to now I could not find any app which is able to handle 6 channels.
>
> > CoolEdit and other apps are able to playback on Ch0 and Ch1.
> >
> > Does anybody know a app which I can use for testing the other channels
>
> > ?
> >
> > Cheers
> > Thomas
> >
> > ******************
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