I have found that whilst experimenting with sound the object with which you strike the 'instrument' makes the sound differ greatly. The carving knife produces a strong, metallic sound but can leave harsh overtones. This is ok for larger bottles but too piercing for smaller objects like jars. The drumstick as you would expect produces a 'woody' sound which is far softer and more appropriate when striking metal. The butter knife is much like the carving knife but less overbearing, suitable for smaller objects. The spoon is similar to this. The fork has less of a solid impact which is ok for very high-pitched sounds but doesn't work with things like woks/saucepans.