[SilverBlade]

If I have a USB DAC and a USB hard drive connected at the same time, would reading data off of the hard drive cause interference in the DAC?
 

 

[Dalamar]

Doubtful.
 
Don't you think you'd hear it, anyways? ...

 

[earerror]

I dont think so...I've never had any interference coming from my hard drives. 

 

[MCC]

I've never had any issues from doing that. If you're concerned you could always clip a Radio Shack ferrite core to the end of the USB cable closest to the DAC to filter out RF interference.

 

[Armaegis]

Usually not, but sometimes neighbouring usb devices can cause some interference with each other (or if a USB device has an external power supply, such as a hard drive, then that power supply might cause issues as well). If a problem exists, sometimes ferrite beads can help, or even just switching to a different usb plug.