Hi Bart, > Does this also go for a driver which is a miniport sound > driver (like PciWave or PciCyclic derivatives)? drivers based on PciCyclic are limited to a minimum latency of 10ms. This extra buffering is caused by PortCls. PciWave does not impose any limitation, it goes as fast as the OS/hardware allows. Best regards, Dirk ****************** 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.de/