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Micro freezes audio [Solved]

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JimH:
Power can also cause problems.  You can't use a USB drive without better power.  The RPi site has information on power.

erviv:
Thanks Jim and Zhillsguy for the feedback.  I switched the music files from a wired connection to my router attached hard drive to music files directly attached to my rpi via USB to avoid these issues. I think it may have helped. 
The rpi 3b wifi only operates on the 2.4 GHz. I think dual bands started with model 3B+.
I already have auto import turned off. 
It is more of a nuisance, so I will continue to tinker, but can certainly live with it.
I just double checked the location of my library files and realized that I had it saved to my local HDD, so I have now moved it to my SD card, as this seems the preference for faster performance. I am now in the process of rebuilding thumbnails and will let this run overnight before further checks.
As an aside I usually use JRemote for playing my music. I notice that when I update my playlists the pi might hang momentarily, and wonder if there are some other periodic communications.

erviv:
Listened to my music last night and still had a couple of micro freezes. If I recall correctly I had a similar problem when running on Jessie which eventually went away, or was significantly less, when I switched to stretch, and is back again with buster.  Anyhow I might explore Dietpi, although it looks like dietpi isn’t supported by JRiver.   Or perhaps just wait and see how different upgrade combinations of raspian and MC get along.
Again thanks for the help.

Zhillsguy:
I get an occasional glitch on my RPi4, but typically I am listening to Radio Paradise flac, and the glitch comes close to the track changes. Still tweaking that.

JRiver runs fine on DietPi, it is Debian based. It is a little tricky to install, but not too bad.

A couple of other somewhat convoluted options that may be tried or tweaked, YMMV...

1. Try using Berryboot which can put the OS on an external USB drive. I noticed a small improvement on my Pi 4 with an SSD in an enclosure. On the older Pis a single USB buss is shared, different animal.

2. Using the two Pi's, install Volumio on P1 with the media files on the external USB and DAC connected. If the Bryson DAC is recognized by Volumio you are in business. Activate DLNA and control playback with JRiver installed on P2. I believe Volumio can share the media files for network access by P2 for import.

This setup can be modified for control and playback in a few different ways for trial, but I am not sure if anything will help. You may end up back where you are now. Using Volumio's browser access for playback control is also an option.

erviv:
Using google search on optimizing Linux audio I came across a suggestion to adjust the following file /etc/sysctl.conf with the addition of the line vm.swappiness = 10

So far since I made the change and rebooted my micro freezes have been diminished. I was going to say gone, but I  have just had one.

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