The audio codec chip wm8731 is controlled by FPGA to produce a 1 kHz sinusoidal wave connected with AC620 Listen to this sinusoidal wave with the earphone interface on the board. (Note that the voice is louder. For insurance purposes, you can use it. Audio with volume control can also be observed by an oscilloscope.

Filename	Size	Update
WM8731\audio_pll.ppf	478	2019-01-04
WM8731\audio_pll.qip	369	2019-01-04
WM8731\audio_pll.v	15289	2019-01-04
WM8731\audio_pll_bb.v	11386	2019-01-04
WM8731\db\.cmp.kpt	204	2019-01-04
WM8731\db\altsyncram_0u14.tdf	11786	2019-01-04
WM8731\db\audio_pll_altpll.v	4556	2019-01-04
WM8731\db\cmpr_ogc.tdf	1750	2019-01-04
WM8731\db\cmpr_pgc.tdf	1850	2019-01-04
WM8731\db\cntr_89j.tdf	3960	2019-01-04
WM8731\db\cntr_pei.tdf	3467	2019-01-04
WM8731\db\cntr_tei.tdf	3601	2019-01-04
WM8731\db\i2c_com.(0).cnf.cdb	4898	2019-01-04
WM8731\db\i2c_com.(0).cnf.hdb	1332	2019-01-04
WM8731\db\i2c_com.(1).cnf.cdb	1546	2019-01-04
WM8731\db\i2c_com.(1).cnf.hdb	958	2019-01-04
WM8731\db\i2c_com.(10).cnf.cdb	19279	2019-01-04
WM8731\db\i2c_com.(10).cnf.hdb	6764	2019-01-04
WM8731\db\i2c_com.(11).cnf.cdb	3282	2019-01-04
WM8731\db\i2c_com.(11).cnf.hdb	2367	2019-01-04
WM8731\db\i2c_com.(12).cnf.cdb	1824	2019-01-04
WM8731\db\i2c_com.(12).cnf.hdb	717	2019-01-04
WM8731\db\i2c_com.(13).cnf.cdb	1982	2019-01-04
WM8731\db\i2c_com.(13).cnf.hdb	1460	2019-01-04
WM8731\db\i2c_com.(14).cnf.cdb	3229	2019-01-04
WM8731\db\i2c_com.(14).cnf.hdb	788	2019-01-04
WM8731\db\i2c_com.(15).cnf.cdb	2149	2019-01-04
WM8731\db\i2c_com.(15).cnf.hdb	1430	2019-01-04
WM8731\db\i2c_com.(16).cnf.cdb	1585	2019-01-04
WM8731\db\i2c_com.(16).cnf.hdb	829	2019-01-04
WM8731\db\i2c_com.(17).cnf.cdb	1731	2019-01-04
WM8731\db\i2c_com.(17).cnf.hdb	1457	2019-01-04
WM8731\db\i2c_com.(18).cnf.cdb	2466	2019-01-04
WM8731\db\i2c_com.(18).cnf.hdb	749	2019-01-04
WM8731\db\i2c_com.(19).cnf.cdb	8220	2019-01-04
WM8731\db\i2c_com.(19).cnf.hdb	2425	2019-01-04
WM8731\db\i2c_com.(2).cnf.cdb	8060	2019-01-04
WM8731\db\i2c_com.(2).cnf.hdb	1671	2019-01-04
WM8731\db\i2c_com.(20).cnf.cdb	1224	2019-01-04
WM8731\db\i2c_com.(20).cnf.hdb	694	2019-01-04
WM8731\db\i2c_com.(21).cnf.cdb	1701	2019-01-04
WM8731\db\i2c_com.(21).cnf.hdb	843	2019-01-04
WM8731\db\i2c_com.(22).cnf.cdb	1994	2019-01-04
WM8731\db\i2c_com.(22).cnf.hdb	865	2019-01-04
WM8731\db\i2c_com.(23).cnf.cdb	4505	2019-01-04
WM8731\db\i2c_com.(23).cnf.hdb	2854	2019-01-04
WM8731\db\i2c_com.(24).cnf.cdb	1334	2019-01-04
WM8731\db\i2c_com.(24).cnf.hdb	748	2019-01-04
WM8731\db\i2c_com.(25).cnf.cdb	2888	2019-01-04
WM8731\db\i2c_com.(25).cnf.hdb	1059	2019-01-04
WM8731\db\i2c_com.(26).cnf.cdb	987	2019-01-04
WM8731\db\i2c_com.(26).cnf.hdb	715	2019-01-04
WM8731\db\i2c_com.(27).cnf.cdb	1474	2019-01-04
WM8731\db\i2c_com.(27).cnf.hdb	752	2019-01-04
WM8731\db\i2c_com.(28).cnf.cdb	3258	2019-01-04
WM8731\db\i2c_com.(28).cnf.hdb	1091	2019-01-04
WM8731\db\i2c_com.(29).cnf.cdb	2285	2019-01-04
WM8731\db\i2c_com.(29).cnf.hdb	732	2019-01-04
WM8731\db\i2c_com.(3).cnf.cdb	4248	2019-01-04
WM8731\db\i2c_com.(3).cnf.hdb	1264	2019-01-04
WM8731\db\i2c_com.(30).cnf.cdb	3924	2019-01-04
WM8731\db\i2c_com.(30).cnf.hdb	797	2019-01-04
WM8731\db\i2c_com.(31).cnf.cdb	1309	2019-01-04
WM8731\db\i2c_com.(31).cnf.hdb	751	2019-01-04
WM8731\db\i2c_com.(32).cnf.cdb	2624	2019-01-04
WM8731\db\i2c_com.(32).cnf.hdb	1018	2019-01-04
WM8731\db\i2c_com.(33).cnf.cdb	911	2019-01-04
WM8731\db\i2c_com.(33).cnf.hdb	703	2019-01-04
WM8731\db\i2c_com.(34).cnf.cdb	1870	2019-01-04
WM8731\db\i2c_com.(34).cnf.hdb	709	2019-01-04
WM8731\db\i2c_com.(35).cnf.cdb	4114	2019-01-04
WM8731\db\i2c_com.(35).cnf.hdb	1281	2019-01-04
WM8731\db\i2c_com.(36).cnf.cdb	4260	2019-01-04
WM8731\db\i2c_com.(36).cnf.hdb	819	2019-01-04
WM8731\db\i2c_com.(37).cnf.cdb	2651	2019-01-04
WM8731\db\i2c_com.(37).cnf.hdb	1023	2019-01-04
WM8731\db\i2c_com.(38).cnf.cdb	4360	2019-01-04
WM8731\db\i2c_com.(38).cnf.hdb	2496	2019-01-04
WM8731\db\i2c_com.(39).cnf.cdb	1592	2019-01-04
WM8731\db\i2c_com.(39).cnf.hdb	1303	2019-01-04
WM8731\db\i2c_com.(4).cnf.cdb	1788	2019-01-04
WM8731\db\i2c_com.(4).cnf.hdb	867	2019-01-04
WM8731\db\i2c_com.(40).cnf.cdb	942	2019-01-04
WM8731\db\i2c_com.(40).cnf.hdb	990	2019-01-04
WM8731\db\i2c_com.(41).cnf.cdb	13815	2019-01-04
WM8731\db\i2c_com.(41).cnf.hdb	3606	2019-01-04
WM8731\db\i2c_com.(42).cnf.cdb	2852	2019-01-04
WM8731\db\i2c_com.(42).cnf.hdb	1010	2019-01-04
WM8731\db\i2c_com.(43).cnf.cdb	4932	2019-01-04
WM8731\db\i2c_com.(43).cnf.hdb	1405	2019-01-04
WM8731\db\i2c_com.(5).cnf.cdb	2020	2019-01-04
WM8731\db\i2c_com.(5).cnf.hdb	1238	2019-01-04
WM8731\db\i2c_com.(6).cnf.cdb	1838	2019-01-04
WM8731\db\i2c_com.(6).cnf.hdb	1096	2019-01-04
WM8731\db\i2c_com.(7).cnf.cdb	1729	2019-01-04
WM8731\db\i2c_com.(7).cnf.hdb	1062	2019-01-04
WM8731\db\i2c_com.(8).cnf.cdb	4385	2019-01-04
WM8731\db\i2c_com.(8).cnf.hdb	1991	2019-01-04
WM8731\db\i2c_com.(9).cnf.cdb	3693	2019-01-04
WM8731\db\i2c_com.(9).cnf.hdb	1775	2019-01-04

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