May 9th, 2021, 9:32 pm
David McGown wrote:Shashi,
Although one can use (and should to experiment and find what works), there is a commercial upsampling player called HQPlayer that many people are using within Roon and standalone (w/ a server) The upsampling algorithms and filters are supposed to be very advanced and flexible, and there is one filter that uses a high number of tap (1M) like the M Scalar. You can download to try it out. It does take a very capable computer to process the files. I have NOT tried it, since I decided to go the route of the hardware M Scaler where the code is programmed in an FPGA that does nothing else. But from what I have read (not necessarily heard) is that many pushing the SOTA in renderers are using this software on a dedicated powerful rendering computer. Just putting that out there as something that might be worth the time to check out once you build your new renderer.
David
May 9th, 2021, 10:01 pm
May 9th, 2021, 10:34 pm
David McGown wrote:Just saw this posted on HQPlayer, a direct comparison of the software against the Chord Hugo M Scaler on Chord TT2 and DAVE DACs. Pretty interesting article on the capabilities, flexibility, and performance of the $260 software vs the cost of the M Scaler ($5000).
https://audiobacon.net/2021/03/17/hqpla ... M%20Scaler.
It does look pretty interesting.
May 9th, 2021, 11:43 pm
May 10th, 2021, 8:02 am
May 10th, 2021, 8:32 am
DaveR wrote:So I downloaded the Foobar plugin and have it set to upsample 44.1, 88.2 and 176.4 to 352.8. It's working just fine with the CPU consumption shown playing a redbook file. This is an i7-2600 and Windows 7 x64. Note that the processor speed is not its max of 3400 MHz. To me, this indicates that you don't need a particularly powerful CPU to accomplish what you're attempting.
May 10th, 2021, 8:45 am
May 10th, 2021, 9:11 am
DaveR wrote:Do you mean resample DSD128 up or resample up to DSD128? Regardless, I did neither. There is no option for resampling DSD in the Foobar plugin. Isn't 352.8 equivalent to DSD256?
FWIW, I use ReplayGain so albums all have the same relative volume. ReplayGain doesn't work on DSD, big surprise, so I convert everything to PCM on the fly on playback. I only save content in its original format since anything I want done for playback can be on the fly. I like to have the option to be able to go back to the original, bit perfect, file which you can't do after you've done something to the file.
May 10th, 2021, 9:22 am
May 10th, 2021, 9:40 am
DaveR wrote:I was showing that there isn't a lot of horse power needed for upsampling, at least for PCM.