The Restoration Process - Audio Restored

Restoration Process

A Simple Philosophy

The ‘true’ art of the audio restorer is to know how far to take the cleaning process. Applying insufficient restoration will result in an ineffective end result, as residual clicks, crackle and other surface noise will remain unnecessarily. On the other hand, excessive digital processing can lead to the introduction of unwanted artefacts which is unacceptable. The secret is to get the balance right.



This philosophy is particularly relevant when dealing with old or severely damaged recordings. In such cases it is preferable to leave a certain amount of baseline noise in (such as a degree of groove noise on a 78) to ensure that the restored sound remains as true to the original recording as possible.

The Restoration Process

Following transcription from the appropriate source, the resulting analogue signal is fed to a CEDAR ADA analogue to digital converter, before applying industry standard processing (CEDAR Duos) technology to effectively reduce/remove the clicks, pops, crackle and hiss which inevitably accompany such transcriptions.

Once the recorded file is saved to the PC, further restoration may be necessary (e.g. reduction/removal of background noise, hum, manual removal of difficult clicks, scuffs and thuds etc.) and this is achieved using iZotope RX5 Audio Editor software, Waves plug-ins (X-noise, X-Click etc.) and Steinberg Wavelab Pro-9 software. Often, these enhancements are more time consuming than the initial transfer, so an additional hourly charge may be necessary, but this would be discussed with the client up front, before proceeding.

Further enhancements to the recording can be made, including optimisation of the sound levels and improvements to the clarity and tonal quality, by making subtle equalisation (EQ) and compression adjustments.


Recordings in poor condition

Inevitably, some records and tapes will have suffered the ravages of time and may be in such a poor state that satisfactory restoration will be difficult, and at worst, may even be impossible. In rare cases where nothing worthwhile can be done, the source media will be returned to the customer with no charge other than the return postage.

That said, for records and tapes in below average to poor condition, we can still apply manual restoration techniques which will undoubtedly produce a CD showing a distinct improvement over the original source. As mentioned above, if such manual restoration is required, this will be discussed with the client before any work is undertaken, and an estimate will be produced (work is charged at an hourly rate). The resulting CD will not deteriorate further, allowing your rare, unique and valuable recordings to be salvaged for posterity.

Life expectancy for CDs is expected to exceed 100 years, so these restorations will outlive all of us!

Please contact us to discuss your requirements before sending any media.

Burn to CD



The restored signal is burned as track separated .wav files to CD-R using a dedicated CD-R burner at a slow writing speed (8x). Finally the resulting disc is QC checked for errors in both sound quality and CD text details using a Tascam CD-RW 901SL pro CD deck.

As standard service, individual songs are separated to give full track skip/search functions. CD text is added for convenience and your face-printed disc is returned to you in a clear, flexible vinyl sleeve.

A CD jewel case with simple bespoke covers (front and back printed CD inserts) can be requested with track listings if provided, or scanned LP cover, for a modest fee to reflect the extra time and effort involved.

Alternative file formats (FLAC, .mp3) can also be accommodated if preferred – please mention this when discussing your requirements.