![]() The same is true for an SPDIF input as well. "Whether or not to use a DAC's built in USB input depends entirely on how well that USB input is implemented. Other inexpensive DAC's I've used in this system did benefit (Sabaj Da2, XtremPro X1, iFi iOne).Ĭlick to expand.Implemented correctly, asynchronous USB is superior to Toslink, due to greater bandwidth and lower jitter. Solution 2 with 5V iPower SMPS did not improve it, and Solution 3 with the same SMPS was detrimental. The DAC I'm currently using, a Korg DS-DAC-100M, seems to deal with computer USB power just fine. ![]() Depending on which DAC I've used, disconnecting from the USB bus was beneficial, or not. I use a Dell 7000 laptop in my headphone system. The DAC definitely needs to be isolated from the RPi's noisy USB power. I use solution 3 in a nice little secondary system with a Raspberry Pi 3 B+ and iFi iOne DAC. I only have one DAC like this, the other five DAC's I've tried needed USB power. I use solution 1 in my main system, because my DAC does not need USB power. iFi Audio iDefender with external power supply. Connect the power leg to a higher quality power supply.ģ. Dual head USB cord (Type B to dual Type A). This only works if your DAC does not use USB power.Ģ. I recommend one of these options instead, in order of preference:ġ. You will be converting from the lowest jitter connection (USB), to the highest jitter connection (Toslink). ![]() Click to expand.Interrupting the power from your computer may be a good idea, but optical is not a good solution.
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