I have a project with a midi track that has been frozen. During playback, I hear the audio track that was created from the midi track by the freezing process. However, when I listen to the .wav file that the mixdown process created, I hear the original midi track. I've lowered the audio track clip's volume all the way down while leaving the frozen midi clip's volume alone. I don't hear the audio clip while listening to the project but I hear it after mixdown. Is this the way it's supposed to work?