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USB DAC problem

post #1 of 25
Thread Starter 

I have a iBasso D2+ and a Fiio E7, both use a pcm2706 for USB and a WM8740 as the actual DAC. I recently bought a new laptop, and no matter what I do, the iBasso is not being detected by the laptop. But when I connect the Fiio, everything works as expected. And by not detected I mean not detected. When I plug it in, there are no changes in the device manager.


The laptop is running Windows 7 Home Premium 64bit with SP1 and all current updates installed.


I already tried a few things to narrow down the problem:

- Used a different USB port > iBasso not detected

- Used a different cable > iBasso not detected

- Used different devices on USB ports > USB ports ok

- Removed USB audio drivers  > iBasso not detected

- Connected iBasso to other computers(Win7pro32bit & Win Vista) > works (so iBasso itself appears to be ok)


What could be causing this?

post #2 of 25

I am not sure if this will help but you can remove power management for the USB HUB devices from Device manager.  This can help with USB problems, but I think your issue is related to something else.  I have seen this with a ton of different USB driver based electronics.   If you get a fix let us know here if you please.

Edited by NA Blur - 10/25/12 at 9:01am
post #3 of 25
Thread Starter 

Tried the powermanagement, no luck :(

post #4 of 25

What are your laptop specs? Especially the USB port types.

post #5 of 25
Thread Starter 

The laptop is a Samsung Series 9 (NP900X3C-A01NL), there's 2 USB ports: 

- a USB 3.0 port (Renesas host controller)

- a USB 2.0 port (Intel 7 series host controller)


Manufacturer specs can be found here: http://www.samsung.com/us/computer/laptops/NP900X3C-A01US-specs (that's the US version, I have the NL version, which is identical except for the language of the operating system).

post #6 of 25

i never had that problem before, nost of usb dac is detect automaticly fast

I use window 7 64bit also

post #7 of 25

Try downloading the D7 driver from iBasso's website:




My guess is that Winders 7 and 8 do not support the driverless DAC like XP did.

post #8 of 25
Thread Starter 
What use is a driver if the device isn't detected at all?

I'll give it a shot anyway...
post #9 of 25

What happens when you open Device Manager and connect the D7 to the USB 2.0 port?

post #10 of 25
Thread Starter 

Ehhhhh what D7?


I'm having a problem with my D2+...



Like I said, it is not detected at all. So it doesn't show up in the device manager (not as a DAC nor as another device). The D2+ works just fine on my other computers. Other devices work just fine on the USB ports of my laptop and I've tried a bunch of different cables.

I think the confusion about the name might come from the example of my Fiio E7, which works without problems on my laptop. The strange thing is that the Fiio E7 and iBasso D2+ use the same chips for USB communication (& the actual DAC-part). And I think they use the exact same drivers too. So why is one working and the other not?



This is really driving me nuts...

Edited by Coop - 10/25/12 at 11:49pm
post #11 of 25

There is no confusion regarding the name.  When I mention D7 drivers I mean just that.  My hope is that the D7 drivers will work for your D2 on your Windows 7 machine.  Do not assume I meant otherwise.

post #12 of 25
Thread Starter 

I was referring to Rollers post :)

post #13 of 25
Thread Starter 

D7 drivers didn't work either :(


During the install you need to connect the device, but as the device isn't detected, the install fails... 



I'm starting to think it might be a resource conflict or something. When I switched on chargingmode while the D2+ was connected to my laptop, my Bluetooth mouse stopped working :/

Edited by Coop - 10/27/12 at 6:52am
post #14 of 25

Can you try uninstalling the USB 3.0 host controller from Programs and Features (not through Device Manager!), restarting the computer and trying again?


And indeed it was me who misread D7 :)

post #15 of 25

The USB 3.0 port will not work.


I had the same problem with my ODAC. Use the USB 2.0 port, the DAC should be auto-detected.

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