Finally found the readme for that download above.
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relnotes.txt Turtle Beach Santa Cruz v.4193 WDM driver
for Win 98SE, ME, 2K, XP
June 23, 2003
v4193 - New Features/Fixes
==========================
* 5.1 Gaming support! Now you can play the latest 5.1 games with the 5.1
speaker config and hear everything you are supposed to.
* Windows Media Player 9 5.1 support added under XP.
Now you can play multi-channel WMA files!
* SRS CSII 5.1 plugin for MP9 works with this driver.
* EAX 2.0 fully compliant. Query for BasicSupport of Deferred EAX
properties now works.
* Fix for games where all sound would suddenly stop.
* Fixed Hibernate/S3 issue where center/sub would not work without a speaker
config change after resume.
* Fixed game port conflict with MPX/nForce motherboards.
* 3d sounds with elevation playback distortion free.
* DSound primary renderer now follows the speaker config. Example going
from 5.1 to headphone, all 3d sounds will now play out two channels.
This corrects missing sounds in games.
* AC3 digital over SPDIF now works in 98SE. Detects if the AC3 node should
be utilized in the topology based on system support.
98SE requires QFE 269601USA8.EXE, 2K requires SP2.
* Enhanced MIDI playback with better timing and fixed region exclusive
(hihats)
* Fixed DSound volume scaling. Now distant sounds in games are more audible.
* Matched Center/Sub volume scaling to front/rear output levels.
* Fixed distortion/intermittent noise playing multiple channels at various
sample rates.
* Synced up the windows speaker modes with Santa Cruz Control Panel.
* Improved Installer. Removes old driver and installs new one. Corrects
missing support files when uninstalling/reinstalling without restarting.
9x now prompts for a reboot after driver install.
* Bugchecks on uninstalling resolved.
* Optimized boot time and resume from standby times.
Additional Notes:
=================
* XP ONLY: Santa Cruz effects may not work when playing certain multi-channel
( >2 ) streams while in 6 speaker mode.
* You can use the 'restore defaults' in the Santa Cruz Control Panel to use
the default speaker setting you selected during the install. Please note
that other presets do not affect the speaker config or the master volume.
* To load the Santa Cruz tray icon (blue speaker), simply run the Santa Cruz
Control Panel from the Start Menu or Windows Control Panel. Right click on
it and select the 'Load System Tray' from the context menu.
* 98SE ONLY: if you install the QFE for AC3 support, the mixer device will
show two wave sliders in tandem.
Enjoy and thank you for choosing Turtle Beach!