Complex sentence: An additional effect came from five 25 cent transducers that were surplus from a pinball machine mounted on the autoharp and wired into a Linndrum sound module which allowed him the option of playing percussion/drum rhythms simultaneously with finger-picking the strings.
Split into simpler sentences: An additional effect came from five 25 cent transducers that were surplus from a pinball machine. He mounted them on the autoharp and ran a line into a Linndrum sound module which allowed him the option of playing percussion/drum rhythms simultaneously with finger-picking the strings.