A circuit for use by a multifunction handheld device is coupleable to an
audio output device. The circuit includes a processing module and a
memory interface, operably coupled to the processing module and a memory
that stores a plurality of digitally formatted files, and that stores
operational instructions that cause the processing module to: receive a
first digitally formatted file of the plurality of digitally formatted
files from the host device when coupled to the host device via the host
interface and store the first digitally formatted file in the memory,
wherein the first digitally formatted file includes a compressed audio
file; receive an analog audio signal from a radio tuner; generate digital
input data from the analog audio signal; compress the digital input data
to form a second digitally formatted file of the plurality of digitally
formatted files; store the second digitally formatted file in the memory;
and playback a selected one of the plurality of digitally formatted
files, the playback including the generation of an audio output signal
for the audio output device.