Use a propane torch- the inexpensive ones found at hardware store. File/ sandpaper the music wire and clean with acetone or lacquer thinner. Wrap with copper wire (I use stuff found at craft stores). Gently heat everything with the outside not inner hottest blue flame. Add some Stay Brite flux from the Stay Brite Silver solder kit. If it just barely sizzles the heating was just right to make the flux 'pentrate'. Now heat the music wire only, not any of the copper wire, and feed the silver solder from the other end opposite the flame. The copper wire will be between the flame and solder. Don't make the wire glow red. When the solder starts to melt it will flow toward the flame with the aid of the flux. It's a practiced art/ skill. If there is too much wire to be soldered then so long as you get the solder to flow from one direction then you can work the other end. This may require you put the solder onto the copper wrap. Don't burn the flux off or burn the copper wire wrapping. Let the solder cool to set up before moving your part that is in a jig. When solder sets up remove part and wash with soap and water to remove the acid flux.