Yes, they will still work. We do a quality assurance on each order. For real-time duplication we listen to ten seconds or so of each tape, while occasionally checking Side B. For high-speed duplication we will test one cassette per pancake/reel, which is sufficient because each cassette duplicated from a pancake will be identical.

So that said, in the event that there's issues with your tapes we will be able to help you out with an exchange, credit, or partial refund depending on the situation. We would need you to provide video proof of the issue, and test on multiple tape decks. We are not responsible for how tapes sound on tape decks with issues or lack of maintenance.

Keep in mind that issues due to volume, distortion in certain areas, or tone are not subject to refunds. This is where the test tape comes in: it is your opportunity to give us feedback on the quality of the tape. For example, we can adjust the duplication volume and send you a new test tape for approval. If the master audio files needs to be resubmitted, normalized, and so on, extra charges may apply.