This is where I encountered some computationally expensive spectral representations (The Continuous Wavelet Transform (CWT), Constant Q Transform (CQT), and others.) I implemented all of these spectral transforms so that I could also implement the algorithms presented by the papers I was reading. I started researching different methods of automatic transcription in mid-2009, because I was curious about how far along this technology was, and if it could be integrated into a future version of Capo.Įach of these automatic transcription algorithms start out with some kind of intermediate represenation of the audio data, and then they transfer that into a symbolic form (i.e. The entry 'A Note on Auto Tabbing' has some good jumping off points: The author of Capo, a transcription program for the Mac, has a pretty in-depth blog.
