A digital audio device. According to one aspect of the invention, the
device includes a memory and an analog input system configured to record
analog audio signals to the memory as digital audio data. The device
further includes a digital input configured to download digital audio
data to the memory, as well as an analog output system configured to
generate analog playback signals decoded from digital audio data stored
in the memory. Furthermore, the device includes a digital output
configured to upload digital audio data from the memory.