|Audio Tape Digitisation Workflow
In one audio tape, there might be differences in azimuth, recording level, or even tape speed and track format along the length of the tape. Many other anomalies may occur during the playback, so careful monitoring is vital to achieve a good quality transfer.
Monitor aurally and with test equipment for any anomalies. Also, the physical playback mechanism should be monitored throughout the transfer process. Tools are available to distinguish event-based anomalies (e.g. clicks) from anomalies that affect the entire tape (e.g. bandwidth and dynamic range limitations). If the material is very homogenous concerning signal quality and contents, automatic monitoring system may be considered.
If you find that playback equipment needs to be adjusted, go back to step 2.1. If you find that the anomalies are caused by damage to the tape, go back to step 1.1.
Rewind the tape and bring it into optimal storage condition (perfect tape pack, perfect enclosure) before returning to long-time storage again. If necessary, add leader tape to the end of the tape.
pp. 11—12, 22.
IASA TC-04, p. 33.
PRESTO: Automated quality monitoring
The QUADRIGA Audiofile-Inspector
NOA Audio Solutions
AudioInspector: Automated logging