I'm trying to understand the fine points for installing an LFX APO. The "Custom Audio Effects in Windows Vista" white paper describes the INF entries necessary to set up the registry for an APO. I'm trying to install an LFX APO on an existing microphone for testing purposes before I get real hardware. I'd rather not take the time to construct an INF file for this quick test, so I'm hacking the registry. I can add the FX\0 registry key, and I've checked the spelling of every GUID 20 times, but the APO is never loaded. Now, the white paper says that the Control\DeviceClasses registry keys are "migrated" to Windows\CurrentVersion\MMDevices\Audio, and I can see that's been done for my motherboard audio device, but there is no hint about how or when that migration magically happens. My suspicion is that the MMDevices\Audio key is the one that audiodg actually pays attention to, and my keys are not being migrated there. So, who does that migration? Is it the Media class installer? That would imply that the INF method is absolutely, positively required to enable an APO (unless I want to change the registry permissions, which I really don't). -- Tim Roberts, timr@xxxxxxxxx Providenza & Boekelheide, Inc. ****************** 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.com/