I am hearing an echo or reverberation in my audio when playing on the timeline or produced file.
This is caused by recording both system audio and another source (microphone, stereo mix, etc.) simultaneously. These tracks can get slightly out-of-sync and cause the echo.
If recording the audio only, select Record System Audio and Do Not Record Microphone under the Audio On dropdown.
If recording your voice only, select your desired microphone and deselect Record System Audio under the Audio On dropdown.
You can also fix existing recordings by deleting one of the audio tracks in the timeline.