I appreciate the response, AGAWA, but I'm on the verge of using Sonore ISO2DVD to process our SACDs -- both stereo and multichannel -- to digital files...and I'm not sure how best to go about doing it. We had some trouble getting the Sonore interface to work with our Oppo 105D, but, when it actually worked, we ended up with DSF files: not ISO.
So the question is: Is it better to go directly to individual DSF files or, with a bit more effort, to go to one big ISO image file to [something else] to lossless FLAC?
One thing's for sure, I don't want to do what some of these folks did and rip all of physical media to something that "pops." I tend to listen to my music at very high levels, so popping or clicking sounds like something that could possibly damage our speakers. In other words, it sounds an awful lot like clipping to me.
Thanks again
That isn't really the question. The question is if you do a test rip to .dsf and play it back over your particular combination of player software and DAC, do you hear any click in between tracks? Further, if you don't hear it in between .dsf tracks, do you hear it if you then switch to play a PCM file? Those are the scenarios you should test, you might find you have no issue at all and this isn't a question of making the right choice upfront otherwise it's some big mistake.
You can then explore the player software settings to see if they can be altered to mitigate any potential click sound, and you can also choose to use the state-of-the-art SACDExtractGUI instead of Sonore's ISO2DSD, as the former is a superior software that allows for additional functions and settings such as padding-less DSF which might also help in mitigating the possibility of hearing any pop/click, depending on your player software and DAC combination.
There isn't any one size fits all answer to this question, it depends, and requires a bit of testing on your end to decide what is the best thing to do for your given setup.
I use JRiver as a DLNA/UPnP server, and either a Sonore microRendu, or Raspberry Pi/Moode endpoints, and there is no pop/click on .dsf track transitions with my DAC, but your mileage may vary, you have to test it and also check to see if your DAC potentially has a firmware update available that can help address that issue, iFi for one has had more than one firmware update over the years attempting to fix that problem with their DACs.
Lastly, if you elect to keep an ISO, and you are using software that can play an ISO (JRiver can), then there is no reason why you'd have to convert those to PCM in the form of FLAC files, I'm not sure where you got the idea that iso need to be converted to FLAC, they do not so long as your player software will actually play an ISO. The only limitation with ISOs is you can't append different metadata or album art to an ISO file like you can with DSF, though that too can sometimes be handled in the player software instead of embedding it in the file.