Can I access the Music Library on my PC without running the Sonos app on my PC?

I keep my music library on my Windows 11 PC, but most of the speakers are in other rooms, and are controlled via the app on an IPhone or IPad. At present, I can only access the music library when the Sonos app is running on the PC. I suspect this is because I set up the Library on the PC, and the pathnames appear on the iPhone or Ipad in shortened form, e.g. as //PCNAME/Piano and Chamber, whereas the name on the PC itself is C:/Users/Myname/Music/Sonos folders/Piano and Chamber. I have tried to set up the music library using a longer pathname on the Ipad, but get the message “Computer is not responding”.

I have used Sonos in both wired and wireless form, but it has no effect on the problem. The configuration of my house means that I need to extend the Wifi, and in the past I have tried the patience of kindly Sonos experts with the problems caused by various Wifi extenders. However, I now have a TP-Link Mesh system, which should be less problematic.

I may be wrong about the cause of the problem, but would like to know whether the library can be accessed without running the PC app on the Windows computer where it is stored, and if so how. I have the impression that at one time in my long history with Sonos this used to be possible.