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Altera_Forum
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13 years ago

Changing the play back rate of a buffer in C?

Hello! I am using an Altera DE2 FPGA board and running Quartus II, Nios II (V10.1). I loaded the Terasic V1.6 demo "DE2_SD_Card_Audio." Currently, I can play a .wav file from the SD card to t...
Altera_Forum's avatar
Altera_Forum
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13 years ago

Here are some options

-simple software delay loop

-timer interrupt with a variable interrupt frequency based upon how fast you want to set the DAC

-Software writes samples to a FIFO and statemachine, which writes data out to a DAC at a particular output rate specified by the software

http://www.dspdimension.com/admin/time-pitch-overview/