Subject: ANNOUNCEMENT: voice/music separation examples available From: Avery Wang <avery(at)CCRMA.STANFORD.EDU> Date: Mon, 13 Jun 1994 22:16:20 -0700I would like to announce the availability of some sound examples from my thesis, which is entitled "Instantaneous and Frequency-Warped Signal Processing Techniques for Auditory Source Separation." The thesis is still being prepared and should be available later this summer sometime. I will make a further announcement. The technique I use involves an adaptive notch filter/harmonic frequency-locked loop to track the instantaneous frequency of each partial belonging to the voice. I used voices because the technique works best on continuous, minimally articulated sounds. Other musical instruments, such as violin, trumpet, clarinet, etc., could be tracked equally well, provided that they are somewhat continuous. Segmenting articulated notes is currently problematic. For example, a rapid succession of piano notes would cause my algorithm to become confused. Automatic segmentation is a future project for which I have definite ideas. These sounds are in 44.1KHz, 16-bit, mono NeXT snd format. Sorry about the bulk. (At least I collapsed the stereo tracks down to mono!) baritone.diff.snd baritone.isolated.snd baritone.orig.snd This is a 4.1 second segment of a baritone and orchestra from the "Barber of Seville". The voice and orchestra have been separated from each other. The algorithm does well on vibrato. soprano.diff.snd soprano.isolated.snd soprano.orig.snd Another snippet from the "Barber of Seville." This 4.1 second example contains a soprano, baritone, and orchestra. The soprano has been separated. The quality here isn't so great, but then again, the mixture really is quite complex. days.diff.snd days.isolated.snd days.orig.snd This is an 8.4 second segment from 10,000 Maniacs' "These are the days". Natalie sings in a mix with melody and harmony parts as well as instrumentals. The melody part has been separated from the harmony and instruments. Despite the articulations, the algorithm manages to track the melody through the mixture. etern.diff.snd etern.isolated.snd etern.orig.snd This is a 22 second snippet of Kathleen Battle and Wynton Marsalis together in "eternal source of light divine" by Handel. Battle is accompanied by soft harpsichord plus some trumpet at the end by Marsalis. Again, the voice has been separated from the mixture. These sound files are available via anonymous FTP to ccrma-ftp.stanford.edu: /pub/Publications/Theses/AveryWangThesis/sound_demos Enjoy, Avery Wang Center for Computer Research in Music and Acoustics (CCRMA) 660 Lomita Dr. Fax: +1 (415) 723-8468 Stanford, CA 94305 Tel: +1 (415) 364-5002 avery(at)ccrma.stanford.edu