Airchecks of the earliest Glenn Gould broadcasts on CBC Radio were recorded on 16-inch transcription discs. The paper discusses the process of preparing these recordings for commercial release on compact disc. The digital tools available for restoration (declicking, decrackling, azimuth correction, broadband denoising, complex filtering, editing) are described. In particular the advantages and disadvantages of the current versions of Sonic Solution's NoNoise system and CEDAR's Series 2 Modules are discussed.
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