Complex sentence: Later in her career she began to lecture, around the UK, on electronic music and studio techniques and in 1971 she wrote the book "An Individual Note of Music, Sound and Electronics", which dealt with electronic music in a philosophical manner.
Split into simpler sentences: Later in her career she began to lecture around the UK on electronic music and studio techniques. Duirng 1971 she wrote "An Individual Note of Music, Sound and Electronics" which investigated electronic music in a philosophical manner.