Hi everyone, The "Custom Audio Effects in Windows Vista" document states that unsigned APOs will not load unless the DisableProtectedAudioDG flag is not set. Does that mean the APO itself needs to be signed with a valid code-signing certificate, or does the CAT file from the driver package need to be signed with the WHQL certificate after passing all the DTM tests? (Or both?) Thanks, Jeff ****************** 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/