HQPlayer’s trial allows you to use the software for 30 minutes at a time for 30 days. I’ll be testing HQPlayer 4.10.3 and Roon Core/Remote 1.8 Build 764 (64 bit). So is HQPlayer too good to be true? Let’s find out. I’ve tried Roon’s upsampling feature and it wasn’t great (sounds better without it). If I could save a ton of money and have one less box, power supply, and cable to worry about…why the hell not. I’m setting up a new listening room so I figured this was worth looking into. With delayed data, you effectively increase the FIRDAC length to four taps and further reduce the effect of jitter.I received many emails requesting a review of HQPlayer: A $260 piece of software that is potentially better than the $5,000 Chord Electronics Hugo M Scaler. Still, it won't reach 36 mA.īy the way, if you should make a circuit like that, it is better to drive one of the two DACs with data that has been delayed over one bit time, rather than with the exact same data as the other DAC. You can increase it further if you use a sigma-delta modulator that can be driven further than 25 %.75 %, for example a second-order sigma-delta or one with an embedded pulse width modulator. With two of those DAC cores, the total peak signal current becomes 10 mA, so 7.071 mA RMS when you play a sine wave. The average current (averaged over a large number of clock cycles) through the output branches then varies between 5 mA and 15 mA, so +/- 5 mA peak variation around a 10 mA DC level. Suppose you have two DAC cores running at 20 mA tail current each and a DSD signal that varies between 25 % ones and 75 % ones (as prescribed in the Scarlet Book). I didn't because the anode to cathode voltage is only about 80 V and I didn't want to get too close to grid conduction, but there is probably some room for increasing the current. You could try doubling that by halving R8.R13 and R79.R81, R83, R84. Right now the tail current is about 10 mA, so the current through each of the lower triodes switches between 0 and 10 mA.
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