Digital Voice Recorder with 8-Track Sampler

The project aims to record the voice of a user at a specified frequency and bit resolution and the user can select to delete or play up to 8 different tracks.

A straight forward user interface was setup via a hyperterminal program which can prompt the user to select record, play, delete, or list. A bit resolution will be prompted to record at followed by a frequency when choosing record by pressing ‘r’. Pressing ‘g’ for play lets all the tracks recorded to be shown and the user can select what he wants to play with a selection of frequency. The ‘d’ key is for deleting any track and the ‘l’ key is for the list function.

The two main systems of the program is divide for the 8515 and the 8535. All the complex operations are handled by the 8515 with 3 main functions involving playback, recording, and deleting. All prompts are displayed by communicating via the UART to a computer running hyperterminal. Continuous sampling on from the microphone circuit and performing playback to the speaker circuit are the functions of the very simple system of the 8535.

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