Running the above here produces the following, maybe it's of help:
PS C:\remote\Sysmon> gc .\audius.xml
<Sysmon schemaversion="4.90">
<DriverName>AudiusSv</DriverName>
<EventFiltering>
<RuleGroup name="" groupRelation="or">
<ProcessCreate onmatch="include" />
</RuleGroup>
<RuleGroup name="" groupRelation="or">
<ProcessTerminate onmatch="include" />
</RuleGroup>
</EventFiltering>
</Sysmon>
PS C:\remote\Sysmon> .\Sysmon64.exe -i .\audius.xml
System Monitor v15.14 - System activity monitor
By Mark Russinovich and Thomas Garnier
Copyright (C) 2014-2024 Microsoft Corporation
Using libxml2. libxml2 is Copyright (C) 1998-2012 Daniel Veillard. All Rights Reserved.
Sysinternals - www.sysinternals.com
Loading configuration file with schema version 4.90
Configuration file validated.
Sysmon64 installed.
AudiusSv installed.
Starting AudiusSv.
AudiusSv started.
Starting Sysmon64..
Sysmon64 started.
PS C:\remote\Sysmon> Get-Service audiussv
Status Name DisplayName
------ ---- -----------
Running AudiusSv audiussv