posted this in the main EDO thread, but thought I'd post it hear in case anyone feels like getting the soldering iron out.
I was still getting quite a lot of hf noise which I assumed was related to EDO. Turns out it was due to the usb cable, even though I had cut it down to 20cm and disconnected the ground and had tried another usb cable which sounded the same. I had used wires from an ethernet cable to make up a cable to connect the vlink 192 to the dac1 via xlr with pin 1 dropped to stop ground loop issues and drain wire connected to the transmit end. So decided to make up a usb cable using this wire. It is 24 gauge cat5e foil screen 4 twisted pair with drain wire. �1.49/m from Maplins. I connected the v+ and ground directly to the Touch board using 2 untwisted wires, these were kept separate to the d+ and d- wires. I connected the d+ and d- wires to the usb a plug and the drain to the a plug screen. then joined the v+, ground and d+,d- back up in the usb b plug. the drain wire wasn't connected to the b plug. result - better dynamics, better detail, better separation, no sibilance. In fact the best sound I have had out of the Touch. So the usb cable was rather a critical component in my setup. Don't know if it was the quality of the cable or separating the v+ and ground from the d+ and d-, but the effect is pretty big. mind you, if you look at standard usb cable wires they are really thin, so that might have had something to do with it. ps I tried various configurations using a twisted pair from a cat6 cable and tin foil twisted pair, unscreened - good detail, open sound, bit hard sounding twisted pair, foil screen - bit enclosed sounding, good bass, less open than unscreened twisted pair, foil screen connected to usb a plug - good sound final setup - cat5e cable, foil screen with drain wire (integral to cable) connected to transmit end, used 1 pair and left rest unconnected. http://www.maplin.co.uk/cat-5e-netwo...tp-solid-13246 also tried ferrites on the standard cable, that had quite a good effect of reducing the hf noise as well, though I don't need them with the above setup. ------------------------------------------------------------------------ SBGK's Profile: http://forums.slimdevices.com/member.php?userid=52003 View this thread: http://forums.slimdevices.com/showthread.php?t=94855
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