 Other solutions are to run tape at a higher speed or use a wider tape.Cassette tapes were originally designed to trade off fidelity for convenience of recording voice by using a very narrow tape run at a very slow speed of 1 7/8 inches per second (ips) in a simple plastic shell when 15 or 7.5 ips was for high fidelity and 3 3/4 ips was lower fidelity.When Advent designed one of the first cassette tape decks for high fidelity, noise reduction was one way to fix problems with the format, along with chrome and high-bias tapes with extended high frequency response.