Hello Robert, > have successfully gotten hold of capture/render pins for the audio > devices (with KSINTERFACE_STANDARD_LOOPED_STREAMING), but when I try > to write to render pin (IOCTL_KS_WRITE_STREAM via DeviceIoControl) > it just fails. PortCls supports IOCTL_KS_WRITE_STREAM/IOCTL_KS_READ_STREAM only for KSINTERFACE_STANDARD_STREAMING. KSINTERFACE_STANDARD_LOOPED_STREAMING is supported only for WaveRT. Regards, Eugene ****************** 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/