This a buzzer on the FPGA program, which can be used to study.

beep song
.........\db
.........\..\logic_util_heursitic.dat
.........\..\prev_cmp_song.map.qmsg
.........\..\prev_cmp_song.qmsg
.........\..\song.ace_cmp.bpm
.........\..\song.ace_cmp.cdb
.........\..\song.ace_cmp.hdb
.........\..\song.asm.qmsg
.........\..\song.asm.rdb
.........\..\song.asm_labs.ddb
.........\..\song.cbx.xml
.........\..\song.cmp.bpm
.........\..\song.cmp.cdb
.........\..\song.cmp.hdb
.........\..\song.cmp.idb
.........\..\song.cmp.kpt
.........\..\song.cmp.logdb
.........\..\song.cmp.rdb
.........\..\song.cmp0.ddb
.........\..\song.cmp1.ddb
.........\..\song.cmp2.ddb
.........\..\song.cmp_merge.kpt
.........\..\song.db_info
.........\..\song.eco.cdb
.........\..\song.fit.qmsg
.........\..\song.hier_info
.........\..\song.hif
.........\..\song.ipinfo
.........\..\song.lpc.html
.........\..\song.lpc.rdb
.........\..\song.lpc.txt
.........\..\song.map.ammdb
.........\..\song.map.bpm
.........\..\song.map.cdb
.........\..\song.map.hdb
.........\..\song.map.kpt
.........\..\song.map.logdb
.........\..\song.map.qmsg
.........\..\song.map.rdb
.........\..\song.map_bb.cdb
.........\..\song.map_bb.hdb
.........\..\song.map_bb.logdb
.........\..\song.pplq.rdb
.........\..\song.pre_map.hdb
.........\..\song.pti_db_list.ddb
.........\..\song.root_partition.map.reg_db.cdb
.........\..\song.routing.rdb
.........\..\song.rtlv.hdb
.........\..\song.rtlv_sg.cdb
.........\..\song.rtlv_sg_swap.cdb
.........\..\song.sgdiff.cdb
.........\..\song.sgdiff.hdb
.........\..\song.sld_design_entry.sci
.........\..\song.sld_design_entry_dsc.sci
.........\..\song.smart_action.txt
.........\..\song.sta.qmsg
.........\..\song.sta.rdb
.........\..\song.sta_cmp.8_slow.tdb
.........\..\song.syn_hier_info
.........\..\song.tis_db_list.ddb
.........\..\song.tmw_info
.........\..\song.vpr.ammdb
.........\..\song_global_asgn_op.abo
.........\incremental_db
.........\..............\README
.........\..............\compiled_partitions
.........\..............\...................\song.db_info
.........\..............\...................\song.root_partition.cmp.ammdb
.........\..............\...................\song.root_partition.cmp.atm
.........\..............\...................\song.root_partition.cmp.cdb
.........\..............\...................\song.root_partition.cmp.dfp
.........\..............\...................\song.root_partition.cmp.hdb
.........\..............\...................\song.root_partition.cmp.hdbx
.........\..............\...................\song.root_partition.cmp.kpt
.........\..............\...................\song.root_partition.cmp.logdb
.........\..............\...................\song.root_partition.cmp.rcf
.........\..............\...................\song.root_partition.cmp.rcfdb
.........\..............\...................\song.root_partition.map.atm
.........\..............\...................\song.root_partition.map.cdb
.........\..............\...................\song.root_partition.map.dpi
.........\..............\...................\song.root_partition.map.hbdb.cdb
.........\..............\...................\song.root_partition.map.hbdb.hb_info
.........\..............\...................\song.root_partition.map.hbdb.hdb
.........\..............\...................\song.root_partition.map.hbdb.sig
.........\..............\...................\song.root_partition.map.hdb
.........\..............\...................\song.root_partition.map.hdbx
.........\..............\...................\song.root_partition.map.kpt
.........\no_rev.pti_db_list.ddb
.........\no_rev.tis_db_list.ddb
.........\song.asm.rpt
.........\song.cdf
.........\song.done
.........\song.fit.rpt
.........\song.fit.smsg
.........\song.fit.summary
.........\song.flow.rpt
.........\song.jdi
.........\song.map.rpt
.........\song.map.summary

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