Michael Vernersen <michaelvvv@xxxxxxxxx> writes: >> On 2017-08-27 15:53, Måns Rullgård wrote: >>> Michael Vernersen <michaelvvv@xxxxxxxxx> writes: >>> >>>> Hi. >>>> >>>> Tried to convert from DSD128 to DSD64. Convertion went fine >>>> but not playing on my DAC. >>>> >>>> My DAC plays DSD64 DSD128 with DOP without any problems. >>>> >>>> Convertion in Sox from 2 Flac works fine. >>>> >>>> My cmd I used is the following. >>>> >>>> sox -V4 01-DSD128.dsf 01-DSD64.dsf rate -v 2822400 sdm >>> Looks like you're using my patched version with DSD features. Could you >>> explain in some more detail what goes wrong? >> > > > Jeps , I'm using your version from ARCH AUR > > https://aur.archlinux.org/packages/sox-dsd-git/ Hmm, that package really could use an update to the latest version in my git repo. There have been some important fixes since it was built. > When the conversion is done, and no errors here, and I > try to play the new file , I get 1 sec high frequency noise from my > DAC chord 2qute and playing stops. The high-frequency noise in the DSD128 input is destabilising the modulator. You need to get rid of it with a low-pass filter. Something like this will do: $ sox dsd128.dsf dsd64.dsf lowpass 50k rate -v 2822400 sdm For a sharp cut-off, use the sinc effect instead of lowpass. The exact frequency isn't important, so you might want to experiment a bit. -- Måns Rullgård ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Sox-users mailing list Sox-users@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/sox-users
