I have been developing apps for the windows platform for the past three years on all levels – as a single developer during late night hours and weekends, as a freelancer, and as a part of well-organized teams. I have worked with companies like Directi and Times Internet Limited.
I assure you to deliver the complete app in three days with clean code and extensibility. I am new to freelancer.com so would be charging the bare minimum.
I have experience with both Windows Phone 8 Silverlight apps and Windows Phone 8.1 WinRT apps.
I would like to discuss the technicalities of the project before it starts. From my understanding the app would basically need two elements, the media streaming agent to stream the audio and a file storage APIs to save the files to the user device.