07-07-2024, 12:37 AM
(This post was last modified: 07-07-2024, 12:40 AM by TheOldPresbyope.
Edit Reason: typo: "unintended", not "intended"
)
(07-06-2024, 07:11 PM)Tim Curtis Wrote:(07-06-2024, 04:48 PM)jcucurull Wrote: Ah you are right, stereo files do not have the compression. So then it is not this the issue...
My guess is that the resampling of ALSA is not working correctly, but I don't understand why 192Khz FLAC files do not present the issue. One reason might be 96 is multiple of 192, while the output of the DSD converted to PCM is likeky to be multiple of 88. But still, this should not work with the setup of Tim.
I forwarded the download link to @TheOldPresbyope and @Nutul.
The streams info I get from ffprobe for this file shows no unexpected features; it's the same as I get for DSD files I've obtained from commercial sites.
The file plays flawlessly on moOde 9.0.4 installed on a Pi 3A+ with Khadas Tone1 USB DAC (formats: . S32_LE, SPECIAL, DSD_U32_BE).
I don't have any HDMI-driven audio gear but I'm wondering if that's a red herring.
The symptom "white noise playing DSD audio" suggests to me that the DSD bitstream is being modified upstream of the conversion to PCM. Perhaps there's an unintended software volume modification.
As an aside, the new software volume feature "DSD format will output 0dB when using Software volume" is awesome!
Regards,
Kent
