Hi,
I have recently had trouble getting Opus dual channel recording working on all calls defined by the recording policy.
There were a lot of recordings still being recorded as .wav instead of .opus.
To get it working took 3 steps:
1) Change the recording format to Opus Dual Channel in the Interaction Recorder config
2) Make sure there are no workgroups that have the "Record all Interactions" check box ticked. This option forces recording in .wav format. This has been replaced with the recorder policy so not needed any more. Make sure you change the recorder policy to include this workgroup.
3) If you are using Interaction Feedback make sure the feedback questionnaires don't have the check box "Record the Interaction" checked. That also forces recording in .wav format and has been replaced by using the recorder policy.
I hope that helps.