Pi4 lands - audio improvement?

(Paul Butler) #1

Pi4 lands…

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(Joseph) #2

Impressive specifications, waiting for an OSMC image to it and than my Allo BOSS DAC has a new mother. :slight_smile:

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(Steve) #3

You would hope so. More RAM , faster processor and they have separated USB and Ethernet so possible noise reduction. Can’t wait to see what people do with it.

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(bevan court) #4

Hopefully the guys at Volumio and Dietpi and Harry @spockfish! will be able to get hold of this soon. I read that distributions may need to be updated.

(Harry ten Berge) #5

Already ordered one.
Yeah this requires some components to be updated.

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(Mr Fix It ) #6

can only order ex USA I think, so I will have to wait…or get while I’m in the states next month

(bevan court) #7

Looking forward to Ropiee on a new Pi that has the USB and Ethernet on a different bus. Can finally move in from my sparky based Allo.

We get better support from Harry than any manufacturer…

(Reader of the Internets) #8

Yeah, it will be nice to be able to use USB out at the same time as Ethernet in! Though to be fair, using WiFi for the connection to Roon has worked just fine for me.

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(Mr Fix It ) #9

can’t say I’ve had issues with USB and Ethernet for that matter either

(Reader of the Internets) #10

For me, it triggered the XMOS fast bitrate-change bug in my Liberty DAC, when I was using the USB to talk to the DAC along with the Ethernet to talk to the network. I switched to using the WiFi instead for the network, and the issue went away. I was curious enough to look at the source for the Pi drivers, and comments in there (and in the issue tracker) suggest that there may be packet loss when using both USB and Ethernet simultaneously, on the Pi3 B+ board. No problem for Ethernet, of course, but I don’t know enough about the USB Audio protocol to know if that’s true there as well.

(Harry ten Berge) #11

yes it is. USB audio protocol (UAC) is just a layer on top of it.

But that’s not the only problem: with the 3B+ there as this ‘fake’ gigabit connection which has problems of it’s own: it results in less bandwidth than running it on 100MB. That’s why RoPieee never uses 1GB connections on a 3B+.

This is all gone with the Pi 4. The first tests already show that the GB network speed is not only theoretical, so this is a huge improvement.

I really don’t care about raw performance (because there is) because that’s not needed at all for our purpose, but this network limitation being a thing from the past … I’m happy :wink:

3 Likes
(Reader of the Internets) #12

Something to watch out for:

#13

I’m pretty interested in this but one thing that is concerning me slightly is that it does appear to run a fair bit hotter than the 3+, e.g. from benchmark data on the DietPi site (https://dietpi.com/survey/#benchmark) we have…

Idle Temps (average/lowest/highest) - 46/22/68 for Pi 3/3+ vs 50/37/65 for Pi 4
Full Load Temps (average/lowest/highest) - 58/28/75 for Pi 3/3+ vs 57/43/69 for Pi 4

I suppose full load isn’t much of an issue, and for a lot of the above it’s maybe 3 or 4C difference, but the lowest idle temp of 37C for the Pi 4 vs 22C for the Pi 3/3+ makes me slightly concerned for those of us (including me) who have their Pi shut inside a media cabinet and how that 15C difference for the coolest it ever gets (according to those benchmarks) might affect stability.

Hopefully I’m seeing potential problems where none actually exist.

(Mr Fix It ) #14

Agree…I’m in the topics and ambient temps are in the 30’s most of the time unless the ac is on. I’m not having issues with lan based connections and even can push dsd512 to Usb dacs so I’ll be sitting on the 3b for a long while…not even the 3b+ even though I have a couple of them.

(Niccolò Terzi) #15

any chance to have multichannel?

(Christoph Seemann) #16

Good question Niccolo!