User Manual
Table Of Contents
- 1: INTRODUCTION
- Intended Audience for this Guide
- About the 2014 Edition
- Additional Resources
- About iZotope
- 2: WHAT IS AUDIO REPAIR AND RESTORATION?
- 3: AUDIO REPAIR AND RESTORATION BASICS
- 4: Understanding Spectrograms / Identifying Audio Problems
- 5: WHAT IS RX 4?
- 6: DENOISING
- 7: TIPS AND TRICKS FOR EDITING DIALOGUE
- 8: BROADBAND NOISE REDUCTION
- 9: REMOVING INTERMITTENT NOISES AND GAPS
- 10: REMOVING CLICKS AND POPS
- 11: REMOVING CLIPPING
- 12: REMOVING REVERB
- 13: EXPORTING AND DELIVERING AUDIO
- Exporting and Delivering Audio in RX 4
- 14: SUMMARY
- 15: ABOUT THE AUTHORS
- APPENDIX A: GETTING SET UP TO REPAIR AND RESTORE AUDIO
- APPENDIX B: GENERAL RX 4 TOOLS
- Appendix C: REPAIRING THE INCLUDED AUDIO FILES
- Example 1: Removing Broadband Noise from a Concert Recording
- Example 2: Restoring an Historical Speech: Making Voice More Intelligible
- Example 3: Cleaning up a Phone Interview with Declick and Spectral Repair
- Example 4: Removing Clicks and Pops from a Concert on Record
- Example 5: Removing Clipping from a Phone Interview
- Example 6: Removing Guitar String Squeaks with Spectral Repair
- Appendix D: Tips from the Pros
100
AUDIO REPAIR
AND ENHANCEMENT
Step 3:
After choosing an acceptable level of click reduction, listen carefully to ensure you aren’t unintentionally
harming any transients. Using a declicking tool on its highest settings can audibly soften transients. If you
can hear that the transients are losing their edge, turn the strength of the declicker down a little.
RX TIP • Use the Clicks Only feature in RX 4 to listen out for the isolated
clicks. If you hear desirable audio creeping in, your settings are likely
tooharsh.
DIGITAL CLICKS
Repeat the same steps used to treat the analog clicks, but instead
use M-Band (periodic clicks) mode if the clicks come in fast
periodic series. If the digital clicks are random, then Random mode
should be used for them. It allows for better preservation of timbre
of the useful signal.
RX TIP • Use Click Widening to expand the click size if your clicks
are not being fully recognized and removed by the Declicker.
RX TIP • Using the frequency skew can achieve better results if a
click is focused specifically towards the high or low end. Generally,
however, this is best left in the middle.