I was trying to investigate the audio effect in PP. When I try to drag something such as muliband compressor, or dynamics to the sequence,I get the circle with a slash (like do not enter), and can't do it.
You have to put it on an audio clip, not just anywhere.
Further, in any version previous to 5.5, you have to match the effect type (stereo for example) to the clip type. Types are mono, stereo and 5.1.
I was dragging to the clip, but it was mono and I had stereo. Thanks.