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Bottom line with 384 upsampling....
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shadowfax  
#1 Posted : Tuesday, September 27, 2016 1:26:11 AM(UTC)
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Tried that with Audirvana.... sound comes out distorted and with a lot of noise. Sounds ok up to 192 upsampling. Now, this is for ripped cd's in my Mac's drive. So what would have to be done? I kind of gathered that the current in the Placid HD has to be increased? Is this so? Thanks.
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Brian Donegan  
#2 Posted : Tuesday, September 27, 2016 1:58:53 PM(UTC)
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That is likely the cause. The DAC draws more current at higher bit-rates.
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shadowfax  
#3 Posted : Tuesday, October 4, 2016 11:54:53 AM(UTC)
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So, are there any recommendations for this? I guess this dac is being used for that by users in this forum. Would that apply to DSD also?
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Brian Donegan  
#4 Posted : Tuesday, October 4, 2016 1:25:35 PM(UTC)
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Try increasing the shunt current on the Placid. That usually fixes the problem, if that is in fact the problem. Try making some measurements to find out for sure.
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shadowfax  
#5 Posted : Friday, December 9, 2016 8:53:38 PM(UTC)
shadowfax

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Hello: Pursuant to the topic at hand I increased the source current to around 685 ma and the shunt is 120 ma. The 384 kHz upsampling is less warbled with each increase of source current. I do not know what the limits of the HD and dac boards are for current, so I am afraid to increase this more..... I wonder if this might be due to an incompatibility with my JLSounds USB board. It play without a hitch up to 192 kHz upsampling even at lower a current.

So, do I keep raising the current until it plays the 384khz frequency? I am doing all this considering DSD playback which is at high frequencies.
Thanks gentlemen
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