Hello, > pin position pos2.playoffset = 5494 , pos1.playOffset = 5715 > pin position pos2.playoffset = 5715 , pos1.playOffset = 5936 > pin position pos2.playoffset = 5936 , pos1.playOffset = 6290 > pos1.PlayOffset < pPin->m_cbStreamData This error is shown for my Virtual Audio Cable driver and VMware VMAudio 5.10.0.3502 (tested under Win7 SP1 x64). Not 100% reproducible but occurs often. WLK 8.0 and 8.1 is affected. Looking on my driver logs, I see repeating KSPROPERTY_AUDIO_POSITION requests sent from a non-paused loop (only several microseconds between consecutive requests). These requests are sent until a submitted buffer is finished but wavetest stops displaying position messages in its log suddenly. After the buffer is finished, wavetest displays "pos1.PlayOffset < pPin->m_cbStreamData" error message. My driver can either completely process KSPROPERTY_AUDIO_POSITION requests itself or let them to be processed by PortCls via IMiniportWavePciStream::GetPosition call. The problem can be reproduced in both modes. I was unable to reproduce this problem with MSVAD and VB-Audio virtual driver. Most probably, there is a kind of race conditions in wavetest. 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/