i did try octa with foobar and it worked on my old dual core laptop. the limiting factor with regard to sq is the cpu load,
at that sampling rate, overdriving the cpu at 60 to 80 per cent. i found the best sq was on dsd 128 as it was
at 20 t0 25 percent cpu load, on sdm type b (fp 32), being the most efficient. this was when i was
comparing jriver with foobar. at octa, jriver was so distorted, whereas foobar was passable.
When I was using Jriver, I found their DSD conversion/upsampling features unusable. With HQPlayer, they are awesome tools and THE key feature of the player. I was very surprised to see how CPU taxing dsd upsampling is.
If I upsample to 4xdsd it puts a 35-70% load on my i5 processor, depending on which filter I use. I have to use the poly-...2S varieties if I want to play quad successfully. My favorite filter is the poly-sinc-mp. In order to use this one(which I believe is HQPlayers best), I need to limit my upsampling to 2xdsd. This puts a 27% load on my cpu, which is an acceptable workload. I also now think this gives me the best SQ of all the possible PCM-DSD conversion settings.
My current settings:
Filter: poly-sinc-mp Modulator: ASDM7 Bit rate: 5644800(2xdsd) Task Manager has now become a very useful tool...27% on these settings
The setting I am most sure of is the modulator, ASDM7. No other setting comes close to it in SQ. Once I found this setting I was convinced converting PCM to DSD was the way to go. It is astonishing to hear 44khz PCM sound so good! :)