This is a violin sound (the theme of J.S. Bach Fugue c-moll from Das Wohltemperierte Klavier) pitched from C4 (262Hz) to D5 (587Hz). You can hear @freesound.org some modifications of this file, resulting from processing by a set of my "hand-made" DSP algorithms in C++ (spectral analysis/resynthesis, phase vocoder): DWK_violin_crazyTrill.wav DWK_violin_falling.wav DWK_violin_maggiore.wav DWK_violin_slower.wav DWK_violin_wah_wah.wav This file is the original one (credits: Pawel Majewski)