I let my own ears decide. Even conversion of a regular, well mastered cd (rip) to dsd128 does miracles and sound nothing short of amazing.
Whether this is because my TEAC UD501 as well as my Calyx M are that much better at playing DSD than PCM I do not know. I am merely confronted with the facts as they represent them to me.
By the way, badly mastered cd's or loudness war victims do not benefit. They sound even worse when transcoded to DSD.
DSD's real magic for me (in the context of transcoding PCM) is that it somehow makes an audible difference for the better. I was highly sceptical about DSD but these old ears are hearing detail and depth I had not heard before transcoding to DSD128. I suspect it has much to do with moving noise to ultrasonic frequencies and by certain euphonic side effects, for lack of better words.
I know MC can transcode DSD on the fly but I like the convenience of having much of my music as DSD128 on my NAS. It has two advantages for me, 1st is that the cpu doesn't nearly have to do as much work when playing the music and 2ndly, less hassle when I want to quickly copy some music onto my DAP (Calyx M).
As to whether 32bit audio is unnecessary or not I will leave open for discussion. However, that is not the point. It is either supported or not supported. My DACs support it...probably for good reason. MC implicitly supports it because we can use 32bit aiff and wv (and wave, I presume). Now I have found what seems to be a bug which I reported.
You're probably not going to benefit from either one of these things. 32 bit audio isn't commercially produced because it's totally unnecessary. I've read statements that vinyl has *less* than 16 bits of usable audio. 24 bits would be overkill. Good overkill, but still overkill.
Converting PCM to DSD seems worthless to me. DSD's "magic" is that the whole playback chain is DSD with no PCM in the middle. As soon as you add PCM, all (most?) of the benefits disappear. Unless you have some rare DAC that has really great DSD performance and poor PCM performance? In which case, MC can transcode to DSD on the fly for you.
Not trying to be overly critical here. Just trying to steer you in the right direction.
Brian.