Read more about sound quality difference between DSD sample rates FREE DSD MUSIC DOWNLOADS [7 ONLINE SITES 2021 DSD free music downloads (hi-res Direct Stream Digital audio files) and stores, stereo and multichannel. However, after reading this and other sources (A popular Computer Audio Forum) I suggest that you keep PCM files as PCM files and DSD Files as DSD Files, should you decide to upsample.DSD64 DSD128 DSD256 DSD512 DSD1024 DSD (Direct Stream Digital) is one of audiophile high resolution digital audio formats with DSD64 (DSD 2.8 MHz), DSD128 (DSD 5.6 MHz), DSD256, DSD512, DSD1024 sample rates and 1-bit audio resolution. If we don't filter them at all, what will their presence do to the sound? It's a complicated problem and such a minimalist approach could introduce more non-linearities and negative effects, more so than the digital processing ever would. The DAC will also introduce frequency spurs all over the place. The overall system's signal-to-noise- ratio will be adversely affected as well. How will the tweeter react to such out-of-band frequencies that are present? Furthermore, sending such a signal that is not limited in bandwidth could cause stability problems with wide-bandwidth amplifiers that have a high unity-gain crossing. Does it sound better without all the digital processing and filtering even with the image of the signal sitting just past fs/2? The energy past 22.05kHz is still present and you are still sending it to the speaker's tweeter. Whenever we get into debates of human perception, the math and theory go out the window. That is one extreme that some may argue is the purest since it avoids any digital artifacts and it's quality relies on human perception by arguing that the human ear in itself acts as a brickwall filter after 20 kHz.
They talk about zero oversampling DACs and such that are completely filter free both in the analog and digital domain. The audio 'purists' want no additional processing on their signal and want whatever comes in from the source to come out as analog. There are basically two points of view regarding this upsampling an oversampling. By carefully designing the sampler, ADC, digital processing path, and oversampling DAC, the upsampling and asynchronous rate transfer can, in my opinion, be avoided. The effects of upsampling are no doubt overstated.
Upsampling, on the other hand, is relatively newer and debated greatly. Oversampling has been around for a very long time and has been used extensively in audio products to not only improve sound quality through 'better' filtering but to make these same products much cheaper. There is no doubt that wide bit words and super-high sampling rates that are touted by the latest products are largely marketing. While it is true that upsampling does help us in attenuating the amount of jitter caused by sampling errors and an inaccurate clock, whether this jitter is audible or not is a point of contention. The effects of upsampling are greatly debated. How much do we need? We have seen the main motivation behind oversampling and how it allows us to use simpler digital and analog filters as well as helping us with quantization noise. So the question remains whether upsampling or oversampling actually make music sound 'better'. What Does This All Mean - Will it Sound Better? Here are the summary points from the article. Oversampling for Digital Audio | Audioholics ()
Bill.You might find this two page article in Audioholics Magazine interesting.
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