A couple weeks ago I purchased my favorite prepared guitar device – round split shot sinkers – i.e. fishing weights! These work out nice because they are easy to use, removable, and provide sufficient weight to unmistakeably modulate the vibration of the string.
The improvisation is not the most impressive piece of music but it does serve as a demonstration of this modification. The tuning is a hybrid of 12 EDO and ring modulated alternate tuning pitches – and I don’t know what the other pitches are at this point.