5.4.8 Speed

5.4.8.1 Although speed correction is also possible in the digital domain, it is better to avoid such later digital correction and to carefully choose replay speed in the first transfer process, and to document chosen speed and justification. Tape recorders are very likely to have exhibited inaccurate speed characteristics due to fault, poor alignment, or in some cases, unstable power supply. Consequently no tape speed should be taken for granted.