AudioBox

FPGA-based audio recorder, player and processing device. It has been developed for the Digital Electronic Systems Design Course

System characteristics

• It is developed ontop Digilent Nexys 4DDR FPGA Board
• The board features a Xilinx Artix-7 series XC7A100T-1CSG324C FPGA.
• The board includes several peripherals (see reference), among them the project uses the following:
  • 8-digit 7-segment display
  • 3 control switches
  • D-pad with 5 buttons
  • RGB LED
  • PDM Stereo microphone
  • Mono audio PWM output

Features

• Audio recording up to 26.21 seconds
• Audio forward and reverse playback
• Audio playback HPF and LPF filtering via a 4-stage FIR filter
• 20-level volume control and display (via 7-segment display)
• Status indication (via 7-seg display)
• Playing time left and recorded time information (via 7-segment display)
• Low recording memory warning and no free memory error

Development

1. Clone the repository locally

git clone git@github.com:margobra8/audiobox.git

2. Open the dsed_audiobox.xpr project file in Vivado Design Suite
3. Synthesise the sources and generate the implementation and bitstream