Audio files inside PatchWorld are presented in the form of bubbles. Bubbles can be recorded in PatchWorld using e.g. Fluid Microphone device to capture your voice or Field Recorder device to capture sound of an instrument device and/or your voice.
Audio captured in the PatchWorld can be found inside the Patch folder in the Content Library section dedicated to your user
Patch\ContentLibrary\<YourUserID>\Samples\Recorded