38 Personal Content Experience: Managing Digital Life in the Mobile Age Figure 2-9. The Wibree short-range networking technology seeks fl exible power con- sumption / speed tradeoff (reproduced by permission of © Nokia). 4) can be cheaply carried along, even though the actual content sits somewhere at home. Due to limitations of channel capacities, intermittency, and other factors, a personal content architecture must be designed to live with content that is missing or only partially present. We will discuss these aspects in Chapter 5. 2.7 Case Study: Mobile Music So far, we have concentrated primarily on mobile devices, and the consequences of us becoming nomadic. Now we will turn our focus closer to content, and look at one particular area of mobile content: music. In this section, we review the recent history of mobile recorded music and discuss how it has evolved in terms of devices and user control over the content. This area is now undergoing a rapid change from physical to digital artefacts, and therefore serves us well to illus- trate the kinds of developments that will follow in many other areas of mobile content. Use patterns related to mobile music are discussed in more detail in section 6.2. Ever since the birth of gramophones in the 19th century, music lis- teners have been able to take their favourite music on the road. Por- table record players usually offered inferior quality compared to those installed at home, but what mattered to people was the portability. They could enjoy the music at friends’, at parties, on the beach, or any