DE2 Audio Codec Programming

I had a short look at this audio codec interface, posted at the first page.

It seems, bbcount indirectly controls the 48kpulse and produces someting like:

f = 48kHz = "CLK" / 10 / 50 -> "CLK" = 500 * 48kHz = 24 MHz

Therefore one could change this easily, adapting the counters. The only thing is the DAC information, which also hangs at this clock thing (?)

I would recommend to rewrite it at least to something like this:

(with " CLK / 10 / 50 equals CLK / 4 / 125")

f* = 48kHz * 125 / 10 = 125/10 * "CLK" / 4 / 125

and transform it to an "enable clock" running at 24MHz, obtaining 24 * 5 * 5 = 600MHz for the ALTPLL. Then you get

IN 50 MHz * 12 = 600 MHz

OUT 600 MHz / 25 / 125 = 24 MHz / 125 = 192 kHz