Diamond Cut Audio Restoration Tools 11.09 vs Perfect Declipper

Diamond Cut Audio Restoration Tools 11.09 is Windows software for cleaning recordings, including old records and tapes, as well as conversations, speeches and concerts. Restoration tools cover noise reduction, spectral repair, click and crackle removal, hum removal, declip repair and batch processing. Harmonic Noise filters at 100 and 120 Hz address line noise. Other capabilities include audio conversion, transcription, speed and pitch changes, and audio and acoustical measurements. It supports ASIO sound card drivers, AAC files such as.aac and.m4a, and up to six VST plug-ins at a time. Its spectrograph display includes Mel frequency axis scaling, added in version 11.08. The standalone program requires Microsoft Windows 10 or later. It costs $59, paid once; there is no free plan, but a demo download is available. The product page includes one year of free support, with manuals, a knowledge base and a user discussion area listed as support resources.

Perfect Declipper is a Windows audio-repair plugin for recordings damaged by excessive loudness and clipping. It calculates missing clipped information from the data that remains, and can restore clipped audio and some dynamics. Thimeo says results can in many cases be indistinguishable from an unclipped original, while also explaining that lost data makes perfect reconstruction impossible and that several reconstructions may be equally good. Windows downloads include VST2, VST3, and Winamp/DSP plugins. Listed hosts and applications include Adobe Audition, Audacity, Cubase, Cakewalk Sonar, FL Studio, PlayoutONE, Winamp, RadioBOSS, and AIMP. The Windows build is listed for Windows XP SP3, Vista, 7, 8, 10, and 11. A Perfect Declipper plan costs €100 as a one-time purchase, with an optional Delossifier add-on for €130. Licenses last for life and include updates, though new features may cost extra.