Some materials, such as magnetic tape, suffer chemical deterioration. We can partially reverse this by heating in a low humidity environment, rejuvenating the tape and transferring the content to more stable formats.
We may use vacuum, abrasive, ultrasonic or solvent cleaning to clean the carriers, with different methods suited to different carriers. For example light solvents, ideal for cleaning vinyl discs, may destroy lacquers; water-based solutions damage gelatine discs.
Audio Services staff are technical experts in all areas of sound reproduction, from turntable and stylus geometry, through to magnetic media and film sound. Our expertise ensures efficient reproduction of all recordings, from a straightforward copy of a 78 RPM disc to a major reconstruction of a damaged lacquer disc, or reproduction of poorly recorded or damaged tape material.
Using analogue or digital processing and noise reduction systems, we can restore and enhance the quality of sound to its original level, regardless of the original format.
We produce or restore new digital files for ready access on many platforms, placing preservation copies in the collection media asset management system for long-term storage.
Preservation is an essential part of media archiving; when we transfer fragile material, we create a new preservation digital file to ensure the survival of the original. In addition, we create duplicate and access copies for the collection which allows public access and different media sizes for delivery to clients.
Our digital audio workstations are equipped with the latest in archiving and restoration tools including Cube-Tec, Isotope, Waves and other restoration tools. This software can remove clicks, crackle, hiss, buzz and a multitude of audible defects from disc, tape, film soundtracks and digital recordings.
We also utilise an audio restoration server called a Cedar Cambridge. Using the Cedar we can process effect 'chains' for restoration of audio files using a batch process function, without the need for manual interaction.