Linux, Windows, and Mac all have a number of software music players that support. It's possible that with some gear, this filter will sound worse than 30k depending on how the gear reacts to the HF noise. Free Lossless Audio Codec (FLAC) is an excellent open and free format. To make the audio experience even better, the software features great integration with a number of other music-centric platforms such as SoundCloud, YouTube, and of course iTunes. The 50kHz filter preserves significantly more noise (especially during DSD64 playback), but is even less likely than the 30kHz filter to muck with frequency response in an audible way. Vox is currently one of the most popular FLAC players on Mac thanks to its simplicity and its ability to support Hi-Res audio, in addition to common formats like MP3 or FLAC. This setting nicely removes nearly all of the noise spectrum in DSD, while leaving some space between stuff we can hear and the filter itself. The 30kHz filter is the best compromise, it's the default in Roon, and what we recommend for most users. The 24kHz filter results in frequency response characteristics that are nearly guaranteed not to offend your PCM gear, but this involves placing a filter fairly near to the limits of human frequency perception. When I convert a DSD to 88.1kHz Flac, find many quantization noise above 30kHz.
I found xld-20181019's DSD filter can't choice IIR filter. Xld is very good for me to convert SACD-ISO to Flac.
