Hello Uwe, > It may help you to install different devices for each format and disable > the unused formats, so that the format for each device never changes. > But I personally did not like that approach and havent tried that. > For the MADI card that would mean for example: > 64 channels x 8 different formats x 9 samplerates = 4608 subdevices to > install. I don't like this as well. I will check if direct access to the registry + KsFilterFactorySetDeviceClassesState solves the problem. > By the way do you know if the number of devices still is limited to 32 > within vista? No, unfortunately I don't know. Regards, Eugene Gavrilov Senior Software Engineer, CEntrance, 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/