I posted this on the Vienna site, but the suggestions I received have not yet worked.
I'm having great difficulty running Vienna Ensemble on a WXP 64 bit platform. The sound is distorted when I trigger a note and the cpu goes all the way to 60 or 70 %. The CPU even surges high when I trigger the sound right from the virtual keyboard inside VE.
I'm using VE in standalone mode. VE runs well on my 32 bit WXP which I have on a separate partition. My sequencer is on a separate computer.
I have the latest 7.3 drivers for my Echo card set up in my 64 bit application and the settings are identical to the 32 bit application of VE. As far as I can tell I have VE set up the same with the soundcard in the 64 and 32 bit platforms. Same drivers, same latency, same WDM settings for my Echo card.
In 64 bit, Vinenna Instruments initially works, but the task manager indicates cpu activity around 20% and even higher when a I play one instrument. VE plays two instruments decently but as soon as I play a third track it is highly distorted. In VE the CPU indicates 60 to 70% and it never falls below 30% even when it is just standing idle.
Audio cds play fine through the media player with no distortion. I disabled all the WXP sounds.
I have a Core 2, 6420. 2.13 GHz,. 6 gigabytes of ram, dual boot WXp/WXp 64, Service Pack 2) Echo Mia card, 40 gigabyte SATA drive for programs, two 500 for audio files (Vienna Winds, Chamber Strings, Percussion, Harps, Special Edition)