Tape Recording Digitization and Cleanup

You've digitized (or are digitizing) cassette tapes, reel-to-reel recordings, or VHS camcorder footage and the resulting digital files have tape hiss, hum, and analog artifacts that need removing.

Digitizing analog recordings converts them to a format that will survive indefinitely — but the digitized file captures all the noise and degradation of the original tape. Cleanup after digitization dramatically improves the result. **Best practices during digitization (before cleanup):** **Equipment matters:** A good cassette deck (Sony TC-K600, Nakamichi BX-2) combined with an audio interface (Focusrite Scarlett Solo) produces significantly better digitization than a cheap USB cassette converter. The deck's bias calibration, head alignment, and transport mechanism quality all affect what noise artifacts end up in the digital file. **Sample rate:** Digitize at 44.1kHz or 48kHz, 24-bit depth (not 16-bit — the extra bits preserve headroom during cleanup). You can always downsample to 16-bit after processing. **Azimuth alignment:** If the recording sounds dull or has poor high-frequency content, the cassette deck's head azimuth may be misaligned relative to the original recording deck. Adjusting azimuth can dramatically improve high-frequency capture before cleanup is even needed. **Record a 10-second noise-only section** before the audio starts on the tape — this noise profile is essential for traditional noise reduction tools. **Post-digitization cleanup workflow:** **Step 1 — Tape hiss removal:** Upload to Voice Isolate for AI hiss removal. AI is ideal because it removes hiss throughout — including during audio — without needing a clean noise section. Alternative: Audacity Noise Reduction using the noise-only section you recorded. **Step 2 — Tonal hum:** Apply notch filters at 60Hz and 120Hz in Audacity or your DAW to address electrical hum that may have been introduced during the analog playback chain. **Step 3 — Click and dropout repair:** Audacity Click Removal (Effect > Click Removal) handles moderate clicking. iZotope RX De-click handles severe tape dropout artifacts. **Step 4 — Frequency restoration:** Cassette tapes have a natural high-frequency rolloff. A gentle high-shelf boost at 8-12kHz (+2-3dB) restores some air and brightness lost to tape oxide degradation. **Step 5 — Export archival copy:** Export as FLAC (lossless) for permanent archiving. Also export an MP3 at 320kbps for sharing. Label files clearly with content and original recording date.

What You Get:

• Best practices during digitization minimize noise before cleanup is needed
• AI tape hiss removal including during audio (not just silence sections)
• Notch filters for electrical hum introduced in the analog playback chain
• Archival workflow: 24-bit during processing, FLAC for archive, MP3 for sharing