<Sound Dev> DirectSound multi-channel recording

[Klaus Jaensch]

Hi Alex,

> Hi Klaus,
> 
> It's CR 6477263: JavaSound doesn't support multi-channels on Windows
> (http://bugs.sun.com/view_bug.do?bug_id=6477263)
> Feel free to develop a fix for the CR :)
> 

Yes good idea, but I fear building the JDK under Windows, because Sun uses 
old versions of SDK's and Compiler (I do not have VS.NET 2003 and I don't 
want to buy it at eBay). I have already build an older JDK version and it 
was horrible. (Tweaking make files and so on ...)
Is it possible to compile dsound.dll seperatly with VS 2005 Express ?

> Why do you want to keep supported format unchanged?
> Right way is to change the supported formats (line/mixer should report formats
> it really supports).
> 

Yes, you are right. But I do not know if it is possible to get the 
supported formats from DirectSound.
I think the number of capture channels is available, but only when the 
line is open.   

Regards,
Klaus

> Regards
> Alex
> 
> Klaus Jaensch wrote:
> > Hello,
> > 
> > I would like to record multi-channel 24-bit audio with the DirectSound
> > JavaSound implementation under Windows. 
> > But the audio formats defined in
> > 
> > j2se/src/windows/native/com/sun/media/sound/PLATFORM_API_WinOS_DirectSound.cpp
> > 
> > are limited to 8/16bit and 1 or 2 channels. 
> > I would like to discuss how this limitation could be removed.
> > 
> > For testing multichannel capabilities of JavaSound I extended channelsArray
> > up to 8 channels and bitsArray for 24/32 bit recordings, then compiled
> > dsound.dll and tested recording.
> > It worked fine, so it's a pity that the recording formats are restricted to
> > basic formats.
> > 
> > The question is how to make multi-channel possible without changing the
> > supported defaults formats, which can be queried by
> > isFormatSupported(AudioFormat).
> > 
> > Regards,
> > 
> > Klaus
> > 
> > ------------------------------------------
> > Klaus Jaensch
> > Muenchen
> > Germany
> > 
> > Institut fuer Phonetik und Sprachverarbeitung
> > Schellingstr.3/II
> > 80799 München
> > 
> > EMail: klausj at phonetik.uni-muenchen.de
> 

------------------------------------------
Klaus Jaensch
Muenchen
Germany

Institut fuer Phonetik und Sprachverarbeitung
Schellingstr.3/II
80799 München

Phone (Work): +49-(0)89-2180-2806
Fax:          +49-(0)89-2180-5790
EMail: klausj at phonetik.uni-muenchen.de