What is the fine-grained topic of the following text: He gained widespread fame as a musician, known for the 1982 synthpop hit “She Blinded Me With Science.” Dolby also has a long history with web-based audio, having created a virtual synthesizer that was used for polyphonic ringtones for cell phones during his time as a tech entrepreneur in the 1990s. Only return the topic.
The career and achievements of musician and tech entrepreneur Dolby.