In the example, the upsampling takes the input to 192Khz, i.e.
format "192000:24:2". Searching quickly online, there is a reference to using SOXR at 352.8Khz (
https://bugs.musicpd.org/view.php?id=4195) but it mentions distortion at these frequencies. It's unclear if the upsampling algorithm itself was to blame so I mention it only as a warning; the only way to find out for your circumstances and equipment is to experiment.
Many DACs are limited to 192 or 256Khz input and may downsample back to these frequencies but I think you are aware of this.
Again, I've looked online, but not quite sure what you mean by 'power of 2' upsampling. Perhaps you can explain if it's significant?
The original thread I sent you is a full set of instructions to incorporate a number of very powerful modifications to the RuneAudio processing. On the right equipment, the sound characteristics are changed noticeably for the better. It does require getting some additional tools, e.g. PuTTY, but this is free. You also need to learn some basic instructions in a Linux file editor (I choose to use Nano but there are others): if you are careful you can follow all the instructions int the post without too much difficulty. Hint: the coloured text is actual instructions to be entered, or the new or changed content; the rest is just to show where the coloured text needs to be changed or inserted.
As you are interested, I suggest you read the whole thread from the beginning. There are many ideas and suggestions and my post just combines and summarises the ones that a number of us have found work well.
I hope this helps.
p.s. This forum is completely international. I, for example, live in Huntingdon - the home town of many great English hi-fi companies (Quad, Meridian, Cyrus Audio, Audiolab, etc.). The modifications in the thread originated in Denmark. Where are you in the world?
