[Note to self: read the entire thread before replying...] Thanks for the response Jerry. =20 Without looking further, I don't understand why 98SE does not work with = 24-bit playback. I unfortunately can state with some certainty that we = would not pursue a QFE for Windows 98 or 98SE. From our point of view = 98SE and 98 (being four and five OSes ago) are pretty much history. = After preaching the single-binary-across-multiple-OSes message for a = while, I hope that doesn't pose too much problem for you all. =20 I realize that you folks are just now starting to make good money on the = operating systems that MS seems to have forgotten about in our focus on = ".Next". Does your target still include 98 at this point, or do = some/all of you think about 2K/ME/XP only? ...just an informal poll. Martin Puryear Development Manager Windows Audio/Video Platform This posting is provided "AS IS" with no warranties, and confers no = rights. Ce message est fourni en l'=E9tat, sans garantie d'aucune sorte, et ne = vous conf=E8re aucun droit. Vous assumez tous les risques li=E9s =E0 son = utilisation. -----Original Message----- From: Jerry J. Trantow = [mailto:Jerry.Trantow@xxxxxxxxxxxxxxxxxxxxxxxxxxx]=20 Sent: Monday, December 02, 2002 9:28 AM To: wdmaudiodev@xxxxxxxxxxxxx Subject: [wdmaudiodev] Re: White Papers now available I have not retested the 24 bit playback issue with Win2000SP3 or WinMe = with the QFE. Using the latest QFE's at the time, I observed truncation = with ever OS except WinXP. =20 I used a test function which opens up various formats and sends playback = buffers of known values. I also installed a filter driver on my audio = device which displayed the usb data sent to my device. I would be happy = to post the code I used if anyone wants to verify the 24 bit playback = with the SPs and QFEs. -----Original Message----- From: wdmaudiodev-bounce@xxxxxxxxxxxxx = [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Daniel E. Germann Sent: Thursday, November 28, 2002 8:30 AM To: wdmaudiodev@xxxxxxxxxxxxx Subject: [wdmaudiodev] Re: White Papers now available Hi, Martin. Thanks for these great resources. I was so excited I read them before I = had breakfast. ;-) In the Audio Device Performance white paper, I saw that a QFE is now = available for Windows Me to fix the KMixer "audio truncation to 16 bits = on playback" problem. I knew about Windows 2000 SP3 having the fix, but = I hadn't heard about the Windows Me QFE. Thanks. The white paper also says the truncation problem does not apply to = Windows 98 or Windows 98SE. Is that correct? I seem to recall Jerry = Trantow doing some testing with USB audio devices in July of 2001 that = indicated the truncation did occur in Windows 98SE. If the Windows = 98[SE] KMixer isn't truncating output data, that would be good to know. = We've been holding off on 24-bit USB devices and WDM Audio drivers = because of this issue. Thank you! Best regards, -Dan ----- Original Message ----- > Subject: [wdmaudiodev] White Papers now available > Date: Wed, 27 Nov 2002 17:42:41 -0800 > From: "Martin Puryear" <martinp@xxxxxxxxxxxxx> > > I would like to announce the immediate availability of two white papers. > > -------------------------- > Audio Device Performance and Windows XP: Best Practices for Drivers > > http://www.microsoft.com/hwdev/tech/audio/highperf-drv.asp > ... ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx Subscribe: = mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=3Dsubscribe Unsubscribe: = mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=3Dunsubscribe Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx URL to WDMAUDIODEV page: http://www.wdmaudiodev.de/ ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx Subscribe: = mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=3Dsubscribe Unsubscribe: = mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=3Dunsubscribe Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx URL to WDMAUDIODEV page: http://www.wdmaudiodev.de/ ****************** 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.de/