Playing a clip in the audio manager is simple and very similar to the API that was in 2.x.x versions of the asset, but a it is more involved than older versions.
If you just want to play a clip with volume and pitch edits, it works just like the old API did with the following setup:
// Standard clip play...
AudioManager.Play("MyClipName");
// Volume and/or pitch edit...
AudioManager.Play("MyClipName", 1f);
AudioManager.Play("MyClipName", 1f, 1f);
For other overrides you’ll need to use the new modules setup. Behind the scenes this setup is used for the volume & pitch edits as well. To apply an edit module you just need to pass a new instance of the module you want in as a parameter after the clip name or after the volume & pitch change. An example below of the same setup for volume & pitch editing by with the module setup:
AudioManager.Play("MyClipName", new VolumeEdit(1f), new PitchEdit(1f));
See more on these modules here: Audio Edit Modules