I am going to collect a small sample of public-domain or donated Chinese Ch'in tunes, possibly including some historic melodies and put them up here in mp3 format: But first, Wang Fei has put up a page on her qin site with some pieces including both her and Professor Li Xiang-Ting. Please see:
The following is not a Ch'in melody, but a computer composition that borrows motif/themes from the previous Chinese Ch'in melody. It was composed and recorded approximately 1988 and released on a alternative label under the title "jade guitar".