Gamut Music has articles on tying different types of strings for different purposes:
- Tying String Knots - to hold the string onto the instrument's tailpiece
- Tying a String-Leader - additional, thinner lengths lengths of gut tied at one end of a string
- Tying Viol Frets - viol family of instruments
- Tying Lute Frets - lute family of instruments
- Tying Tailgut - used to attach the tailpiece on to instruments