Most CVRs today are analogue recorders using magnetic tape as the recording medium. Recently, solid-state CVRs in which the audio information is sampled, digitised, recorded and transferred into memory chips for storage, have become available.
 Modern FDRs are mostly digital recorders using magnetic tape as the recording medium. As with CVRs, solid-state FDRs are now available in which the recorded and digitised data is stored in memory chips
Solid-state digital flight data recorder pictured...
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