Regarding DSD, this blog should be read by everyone who thinks it's a better format (relatively short without too much tech talk). If you are going to take the time and effort to seek out DSD or convert your library to DSD you should, at minimum, understand why and what benefit you will be getting, if any at all.
http://www.mojo-audio.com/blog/dsd-vs-pcm-myth-vs-truth/
DSD was essentially introduced as a cheap way for Sony to archive their music library. Marketing caught wind of it and upsold the 'benefits' to consumers and SACD was born - which there really are no benefits except for a cheaper and less expensive way to approximate true audio fidelity using cheap Delta-Sigma DAC chips. At the expense of quality we are forever caught up in a marketing game of high numbers that actually is hurting the fidelity of our music. Similar to what has been happening with the dynamic range loudness wars.
In the end DSD doesn't actually provide more detail than high res PCM recordings. From the blog............
"Though you can’t make a direct comparison between the resolution of DSD and PCM, various experts have tried. One estimate is that 1-bit 2.8224 MHz DSD has similar resolution to a 20-bit 96 KHz PCM. Another estimate is that 1-bit 2.8224 MHz DSD is equal to 20-bit 141.12 KHz PCM or 24-bit 117.6 KHz PCM.
In other words, DSD64, or SACD, has higher resolution than a 16-bit 44.1 KHz Red Book CD, roughly the same resolution as 24-bit 96 KHz PCM recording, and not as much resolution as a 24-bit 192 KHz PCM recording."
The big issue I have with DSD is that to clean up the noise you need to add noise shaping algorithms and to me it just kills the life of the music. What I hear from DSD is digital, plastic, and lifeless. Not only that, but in direct tests I have done the audible difference is basically non-existent except for noted above. I dare say the differences that may exist are for the worse. I admit, I initially fell for the marketing trap but over time became aware of the 'how and why' of DSD because something just sounded off to me.
"Of course DSD64 is another story: above 25 KHz the quantization noise rises sharply, requiring far more sophisticated filters and/or noise-shaping algorithms. When you filter the output of DSD64 with a simple low-pass filter, the result is distorted phase/time and some rather nasty artifacts in the audible range. The solution is noise-shaping algorithms that move the noise to less audible frequencies and/or higher sampling rates. This is why DSD128 (Double-Rate DSD) and the other higher-sample-rate DSD formats came into being. This is also why advanced player software, such as JRiver, offers Double-Rate DSD output."
Everything about DSD to me screams compromise. PCM is fine for me and I'd rather not occupy my precious storage space with a format that, in my opinion, is inferior, and nothing more than marketing.
As always, this is my perspective on the formats, but the facts are there. They back up what I hear and if you read the link provided they may back up your experiences as well. BUT at the end of the day if you just love DSD and love what you hear from it who am I to say anyone is wrong. Just enjoy what floats your boat.
I don't want this thread turning in to a DSD vs PCM battle. We should keep on topic but there has been so much said about DSD quality with the X5ii I thought it appropriate to post this.