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Altera University Program Audio core
https://people.ece.cornell.edu/land/courses/ece5760/DE1_SOC/Audio_core.pdf
The Audio core interacts with the Audio CODEC (enCOder/DECoder) on the Altera DE-series boards and provides an interface for audio input and output. 2Functional Description The Audio core facilitates the transfer of audio data with the Audio CODEC chip on the Altera DE-series boards. Data is transferred serially between the FPGA and the CODEC.
VHDL coding Altera DE1 audio codec chip - Stack Overflow
https://stackoverflow.com/questions/43649829/clock-configuration-vhdl-coding-altera-de1-audio-codec-chip
I am working on a project where I am required to code the WM8731 audio codec chip on the Altera DE1 board. The project is very basic. It does not need to process the input audio signals. The signal from the input should be directly relayed to the output. The main task is to set up the codec chip via the I2C protocol.
vhdl - How to Get Audio Out via the Wolfson WM8731 …
https://stackoverflow.com/questions/29930487/how-to-get-audio-out-via-the-wolfson-wm8731-codec-on-the-altera-de2-115-educatio
According to my logs, I used 3 of these cores to make audio work. The altera_up_avalon_audio_and_video_config, which is used to configure the audio CODEC chip at initialization. The second IP provide data in/out interface with the audio chip: altera_up_avalon_audio. The last one is altera_up_avalon_clocks. I can't remember exactly …
DE2 Audio Codec Programming - Intel Community
https://community.intel.com/t5/Programmable-Devices/DE2-Audio-Codec-Programming/m-p/60414
Hello, I am attaching a VHDL file which describes an interface to the Wolfson WM8731 Audio Codec chip located on the Altera DE1 and DE2 boards. This version just does output, but you can augment it to do input. For this you will have to read over the WM8731 datasheet. I have tested this on both the DE1 and DE2 boards.
Altera DE2 Board
http://www.ece.tufts.edu/~hchang/ee129-f06/project/project2/DE2_UserManual.pdf
Audio CODEC • Wolfson WM8731 24-bit sigma-delta audio CODEC • Line-level input, line-level output, and microphone input jacks • Sampling frequency: 8 to 96 KHz • Applications for MP3 players and recorders, PDAs, smart phones, voice recorders, etc. VGA output • Uses the ADV7123 240-MHz triple 10-bit high-speed video DAC
Audio CODEC AIC23 vhdl/verilog - Intel Communities
https://community.intel.com/t5/FPGA-SoC-And-CPLD-Boards-And/Audio-CODEC-AIC23-vhdl-verilog/m-p/10955
Hi, The attached is a Quartus II project for 2S60 DSP kit. The design includes Verilog codes for AIC23 audio CODEC, which digitize Line-in analog and play back to Line-out. The sample is fully controlled by a HDL state machine, but normally I use a Nios II controlled version and it’s much more flexible. If you love Nios II I will attach it.
Audio/Video Configuration Core for DE-Series Boards
http://ee.sharif.edu/~microlab_t/micro/Audio_and_Video_Config.pdf
See theWolfson WM8731 Audio CODEC datasheetfor more information about the audio chip’s parameters. Altera strongly recommends that users configure and initialize the audio and video devices with the auto-initialize option, and the default settings. If the audio input comes from the microphone instead of Line In, users should select
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