More > JRiver Media Center 27 for Linux
Raspberry 4b - playback stops every few seconds. buffering... (DSD/DSF)
hans4712:
--- Quote from: Awesome Donkey on February 21, 2021, 01:00:40 pm ---If you had a DSD-capable USB DAC connected via USB to the Raspberry Pi and you output all audio and bitstreamed DSD to that, it would avoid the conversion (unless you're converting PCM to DSD, which isn't going to work with a Pi). From there you can output from the USB DAC to your receiver. But DSD converted to PCM output via HDMI to a receiver from a Raspberry Pi isn't going to be an enjoyable experience at all because of the Pi's bottleneck.
Hopefully that makes sense. :)
--- End quote ---
i will most likely get a mini pc and send the signal via hdmi directly to the receiver via bitstream. Ac3 e.g. The receiver decodes files in multichannel itself, as well as all of the bluray soundtracks. SACD files (dsf / dsd / dff) unfortunately have to be decoded by the mini-pc / jriver to such an extent that the receiver accepts this. some files have to be downscaled from 192,000hz to 96,000hz in order to be decoded by the receiver. Much is possible via bitstream and "hdmi trough", but of course not everything.
I had of course already considered such a mini-pc in the living room and an external dac, but you often think about it, move it and then play around with a raspberry. these raspberries are not bad. but now I seem to be completely in line. it won't work with the raspberry.
I don't know if you happen to know that, but can a mini pc like the intel nuc (sorry actually don't want to advertise here) also output via hdmi 9.1 or 11.1? Shouldn't it work theoretically? Or could it shine on the hardware of the mini-pc? (Good is a bit heavy because it's already heading towards auro and dolby atmos)
Dennis in FL:
--- Quote from: Awesome Donkey on February 21, 2021, 12:48:28 pm ---Since you're outputting via HDMI you're likely converting the DSD to PCM on-the-fly, since it's not possible to bitstream DSD via HDMI from any computer, which is likely the cause of your issue (as DSD to PCM conversions are resource heavy operations). Your described symptoms are exactly what happens when this is the case.
--- End quote ---
I also have a Raspberry 4 with 4Gb with the lastest raspOS and MC27 on SSD. I also use the HDMI output of the Raspberry to my Marantz 6013 receiver
I don't have audio problems with SACD --- I'm listening to some Jazz right now (see screen shot)
Awesome Donkey:
Since it's stereo, the Pi 4 might barely be fast enough to handle the on-the-fly conversion. But since you're using HDMI output, it is converting DSD to PCM.
Dennis in FL:
I forgot to add --- My main library is on an desktop iMac external HDD. The Raspi MC gets the music from the Mac MC library over WiFi. My receiver is reporting the source at 44.1kHz PCM.
And - I increased my Raspi swap file to 1024 (but when I ran off a SD card and the default buffers - it was also OK)
Awesome Donkey:
Even so, I still wouldn't recommend using a Raspberry Pi for DSD to PCM (or PCM to DSD) conversions.
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