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Instruction Guide 128x64 OLED with Song Status and Spectrum Display on Raspberry Pi
I'm still not able to repro any issues with having Loopback on but I don't have your exact config since I don't have an OLED  or run mpd_oled etc

The 90 minute test below was run on a system that has Loopback on to run the Multiroom sender daemon playing Jazz 24 station. CPU utilization avg 2%.

Code:
Authenticated to trx ([192.168.1.199]:22).
Linux: 11.5 | 5.15.61-v8+ #1579 | aarch64 (64-bit)
Raspi: Pi-3B+ 1.3 1GB
Audio: Pi HDMI 1

                     ____     __      ___
         __ _  ___  / __ \___/ /__   ( _ )
        /  ' \/ _ \/ /_/ / _  / -_) / _  |
       /_/_/_/\___/\____/\_,_/\__/  \___/

                moOde audio player
             Release 8.2.1 2022-MM-DD
               (C) 2014 Tim Curtis


The programs included with moOde are free software; the
exact distribution terms for each program are described
in the individual files in /usr/share/doc/*/copyright or
in the moOde source files. moOde comes with absolutely
no warranties either expressed or implied, or any other
such guarantees.

To set a new password for the user 'pi' type 'passwd'.

pi@trx:~ $ date
Wed 21 Sep 2022 05:37:33 PM EDT

pi@trx:~ $ moodeutl -m
^CU: 1.4 GHz, LOAD: 2% 51C | MEM: 22% used | DISK: 9% used, 26G free | PHP: 5 workers

pi@trx:~ $ date
Wed 21 Sep 2022 07:03:21 PM EDT
pi@trx:~ $

I would troubleshoot by starting with fresh 820 and Loopback on and see what happens to CPU utiiization. Then add the other components one by one and retest to try and isolate the issue.
Enjoy the Music!
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Messages In This Thread
RE: 128x64 OLED with Song Status and Spectrum Display on Raspberry Pi - by Tim Curtis - 09-21-2022, 11:13 PM
RE: help me - by ghera78 - 02-28-2020, 08:01 AM
RE: help me - by ghera78 - 02-28-2020, 01:17 PM

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