Function:when different buttens are pressed, beep will play sound with different frequency. laguage:VHDL

beep\beep.asm.rpt
beep\beep.cdf
beep\beep.done
beep\beep.dpf
beep\beep.fit.rpt
beep\beep.fit.smsg
beep\beep.fit.summary
beep\beep.flow.rpt
beep\beep.map.rpt
beep\beep.map.summary
beep\beep.pin
beep\beep.pof
beep\beep.qpf
beep\beep.qsf
beep\beep.qws
beep\beep.tan.rpt
beep\beep.tan.summary
beep\beep.vhd
beep\beep.vhd.bak
beep\db\beep.asm.qmsg
beep\db\beep.asm_labs.ddb
beep\db\beep.cbx.xml
beep\db\beep.cmp.cdb
beep\db\beep.cmp.hdb
beep\db\beep.cmp.kpt
beep\db\beep.cmp.logdb
beep\db\beep.cmp.rdb
beep\db\beep.cmp.tdb
beep\db\beep.cmp0.ddb
beep\db\beep.db_info
beep\db\beep.eco.cdb
beep\db\beep.fit.qmsg
beep\db\beep.hier_info
beep\db\beep.hif
beep\db\beep.lpc.html
beep\db\beep.lpc.rdb
beep\db\beep.lpc.txt
beep\db\beep.map.cdb
beep\db\beep.map.hdb
beep\db\beep.map.logdb
beep\db\beep.map.qmsg
beep\db\beep.pre_map.cdb
beep\db\beep.pre_map.hdb
beep\db\beep.rtlv.hdb
beep\db\beep.rtlv_sg.cdb
beep\db\beep.rtlv_sg_swap.cdb
beep\db\beep.sgdiff.cdb
beep\db\beep.sgdiff.hdb
beep\db\beep.sld_design_entry.sci
beep\db\beep.sld_design_entry_dsc.sci
beep\db\beep.syn_hier_info
beep\db\beep.tan.qmsg
beep\db\beep.tis_db_list.ddb
beep\db\beep.tmw_info
beep\db\logic_util_heursitic.dat
beep\db\prev_cmp_beep.asm.qmsg
beep\db\prev_cmp_beep.fit.qmsg
beep\db\prev_cmp_beep.map.qmsg
beep\db\prev_cmp_beep.qmsg
beep\db\prev_cmp_beep.tan.qmsg
beep\incremental_db\compiled_partitions\beep.root_partition.map.kpt
beep\incremental_db\README
beep\incremental_db\compiled_partitions
beep\db
beep\incremental_db
beep

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