Perhaps you could try using Puredata+Heavy to create a multi-band volume meter plugin for your design.
You can see how it's done in our recent live Stream:
Located at: https://youtu.be/F06FphCm6Is?t=4691
Throughout the broadcast,
I showed the creation of the Puredata patch,
the download and configuration of Heavy,
and the deployment of the plugin.
This solution has some limitations,
but is perfectly fine if you are working on an experimental project!
a custom plug-in is used to take the volume of different frequency bands from the audio signal and output them as RTPC values.
Hope this can help you,
any follow-up questions are welcome to add in the following