Yes! Just as long as you hear the words at the end of the recording: 'And at the count of five, open your eyes…’ etc then you were simply in deep hypnosis and your subconscious mind received all of the helpful programming.
Don’t worry if you don’t seem to hear or remember Peter’s words, or if thoughts float in and out while listening. This is simply the conscious mind doing what it likes to do. If you just seem to drift off somewhere, that’s absolutely fine, it won’t affect the outcome of the hypnosis session at all.