The redaction process/system operates on temporarily captured/saved audio file during an agent-customer-call center (CC) call. Voice-based audio data is captured and processed by monitoring data input from CC-agent into a defined data field (field in a CC-agent-presented form). The redact process generates a start-record time based upon initial data input into the field and further generates an end-of-recording (“EOR”) time for the field. The audio file is filtered and segments are permanently saved audio data (A-data) bounded by the start-record and EOR times. Thereafter, all stored audio data is deleted (preferably crypto-shredded) except the saved A-data to substantially eliminate retrieval of initially stored audio data. An IVR process can be used to trigger record ON/OFF instructions. Audio file segments can be trimmed with precursive and successive time periods to move the start and end times of the audio segments. System Operator sets time-trim periods.