Quote:   thanks, then it only could be this one http://www.via.com.tw/en/products/audio/usb/vt1731/index.jsp , interesting specs btw.

Quote: Kingwa, who is the manufacturer of this USB-32 Chip?

Quote: thank you for your efforts! if other people don´t hear clicks/pops or experince audio dropouts/buffer underruns, then they have no reason to investigate any further or they don´t have enough IT expertise to troubleshoot the stuff. some guys immediately sell or send back stuff not...

usb-driver-wise you are up to date. nevertheless, too high dpc latencies with the tenor te8802 driver. as you can see, with your Fiio E17 everything is cool. but this is another chip and does not support async mode afaik.  

this is what I have assumed Driver with highest DPC total execution time:         USBPORT.SYS - USB 1.1 & 2.0 Port-driver, Microsoft Corporation   could you please open the command line (cmd.exe)   run this from within the command prompt   cd %SystemRoot%\System32\drivers dir...

ok , pm sent with my email address, so you can send me your dxdiag file.  

could you also check this with www.resplendence.com/download/LatencyMon.exe   this time you have to install the proggie. play an audio file back, clickthe green play button in LatencyMon and collect data. after a minute or so, have a look at the CPU tab. what was the highest cpu hog? i guess...

misios, thank you very much. may i ask what components your windows machine has? chipset, cpu?   imho this values are way too high. this clearly is a bug in firmware/driver of the tenor te8802L.

Quote: I´ve checked the thread already. there are only screenshots of wasapi, asio & ks. Could you please post your pic with directsound?   thanks

Quote:   bad news ...   could anyone with a tenor 8802 device please test this:   http://www.thesycon.de/dpclat/dpclat.exe   You don´t have to install this (Windows 8 users shouldn´t try it, because ist doesn´t work accurately atm). Simply start it.   Then open your music...

apologies for necrobumping this thread, but I also have installed the SP1 since 2011, there is some confusion with it.   Could you please post your driver version numbers here   go to Windows device Manager, expand the USB Controller, double-click on USB enhanced host controller, click...

Quote:   don´t judge this DAC too hard. for the price you pay you get a lot. i use it with the xlr outputs and active monitors, and there are no mids lacking. by the way, this device is no dedicated headphone amplifier, it is a dac with an additional headphone amp. no more, no less ...

Quote: it is 70 Ohms. why do you ask?

I´ve just acquired a teac ud-h01. when i turn the headphone level knob to end stop leftmost, I can still hear the audio signal. is this normal behaviour for the teac?