File list (Check if you may need any files):
DE1_i2sound
...........\DE1_i2sound.asm.rpt
...........\DE1_i2sound.cdf
...........\DE1_i2sound.done
...........\DE1_i2sound.fit.rpt
...........\DE1_i2sound.fit.smsg
...........\DE1_i2sound.fit.summary
...........\DE1_i2sound.flow.rpt
...........\DE1_i2sound.map.rpt
...........\DE1_i2sound.map.summary
...........\DE1_i2sound.pin
...........\DE1_i2sound.pof
...........\DE1_i2sound.qpf
...........\DE1_i2sound.qsf
...........\DE1_i2sound.qws
...........\DE1_i2sound.sof
...........\DE1_i2sound.tan.rpt
...........\DE1_i2sound.tan.summary
...........\DE1_i2sound.v
...........\DE1_i2sound_assignment_defaults.qdf
...........\DE1_i2sound_description.txt
...........\I2C_AV_Config.v
...........\I2C_Controller.v
...........\PLL.ppf
...........\PLL.v
...........\talkback
...........\........\DE1_i2sound.gui.talkback.xml