have to write a high level description of my project this is what i have so far
ID: 3581457 • Letter: H
Question
have to write a high level description of my project this is what i have so far so please can anyone edit proff and add stuff to it make it sound nice. Our project consist of playing an audio through a device that has a line out capabilities like a phone, computer or mp3 player. First we looked at the DE2 board and noticed there was a mic in , line out and a line in port. We then realized that a mic in option will not be ideal way to go about doing this project because of cost purchasing a microphone and the issue of getting the mic in to work on the board. We settled with a 3.5mm aux cable we plugged into our phone other end of the cable plugged into the DE2 board. To store the audio temporally to the de2 we used the internal 16 bit Codec WM8721, there we used regs to manipulate the audio to our likeness. We have a module for the three different passes for this project, we implemented a low pass module, high pass module and a mid pass filter each filter has a specific frequency that will allow to pass through for example a low pass filter only allowed frequencies below 150 Hz pass. to trigger this effect we have a switch three different switches that will turn them on and off. We made implemented an echo module this module takes the audio being played and repeats it, to work this module we stored it on the audio on the SDRAM on the DE2 and repeated it back. We also have a visualizervizalizer module that acts a level to let us know how loud the volume is fromform the audio. In this module we set each of the leds as a single bit and used to a loop to generate a cycle fromform the left or from the right.
Explanation / Answer
Project is to play audio through device which have line-out capabilities like phone, computer or mp3 player. We researched on DE2 board and noticed mic-in, line in/out port. After thoroughly analyzing feasibility of incorporating min-in, we decided to only use Aux-3.5mm cable which will be plugged to DE2 boards and phone by each end. Implemented 16-bit codec WM8721 to temporarily store the audio and used reg's to manipulate audio to likeness. We also implemented different passes for this project which are changeable using switch - low pass filter (<150HZ frequency), high pass module and mid pass filter. We implemented echo module that takes audio being played and repeats it, stored it on the audio on the SD-RAM on the DE2 and repeated it back. Visualizer module was also incorporated acting as level to let us know how loud volume is from audio. In this module we set each of the led's as a single bit and used to a loop to generate a cycle from the left or from the right.
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