File list (Check if you may need any files):
USB_AudioClassProject\App\main.c
.....................\...\main.h
.....................\...\stm32f4xx_conf.h
.....................\...\stm32f4xx_it.c
.....................\...\stm32f4xx_it.h
.....................\...\system_stm32f4xx.c
.....................\...\usbd_conf.h
.....................\...\usbd_desc.c
.....................\...\usbd_desc.h
.....................\...\usbd_usr.c
.....................\...\usb_bsp.c
.....................\...\usb_conf.h
.....................\Project\ExtDll.iex
.....................\.......\main.crf
.....................\.......\main.d
.....................\.......\main.o
.....................\.......\misc.crf
.....................\.......\misc.d
.....................\.......\misc.o
.....................\.......\startup_stm32f40_41xxx.d
.....................\.......\startup_stm32f40_41xxx.lst
.....................\.......\startup_stm32f40_41xxx.o
.....................\.......\startup_stm32f40_41xxx.s
.....................\.......\stm32f4xx_adc.crf
.....................\.......\stm32f4xx_adc.d
.....................\.......\stm32f4xx_adc.o
.....................\.......\stm32f4xx_can.crf
.....................\.......\stm32f4xx_can.d
.....................\.......\stm32f4xx_can.o
.....................\.......\stm32f4xx_crc.crf
.....................\.......\stm32f4xx_crc.d
.....................\.......\stm32f4xx_crc.o
.....................\.......\stm32f4xx_cryp.crf
.....................\.......\stm32f4xx_cryp.d
.....................\.......\stm32f4xx_cryp.o
.....................\.......\stm32f4xx_cryp_aes.crf
.....................\.......\stm32f4xx_cryp_aes.d
.....................\.......\stm32f4xx_cryp_aes.o
.....................\.......\stm32f4xx_cryp_des.crf
.....................\.......\stm32f4xx_cryp_des.d
.....................\.......\stm32f4xx_cryp_des.o
.....................\.......\stm32f4xx_cryp_tdes.crf
.....................\.......\stm32f4xx_cryp_tdes.d
.....................\.......\stm32f4xx_cryp_tdes.o
.....................\.......\stm32f4xx_dac.crf
.....................\.......\stm32f4xx_dac.d
.....................\.......\stm32f4xx_dac.o
.....................\.......\stm32f4xx_dbgmcu.crf
.....................\.......\stm32f4xx_dbgmcu.d
.....................\.......\stm32f4xx_dbgmcu.o
.....................\.......\stm32f4xx_dcmi.crf
.....................\.......\stm32f4xx_dcmi.d
.....................\.......\stm32f4xx_dcmi.o
.....................\.......\stm32f4xx_dma.crf
.....................\.......\stm32f4xx_dma.d
.....................\.......\stm32f4xx_dma.o
.....................\.......\stm32f4xx_exti.crf
.....................\.......\stm32f4xx_exti.d
.....................\.......\stm32f4xx_exti.o
.....................\.......\stm32f4xx_flash.crf
.....................\.......\stm32f4xx_flash.d
.....................\.......\stm32f4xx_flash.o
.....................\.......\stm32f4xx_fsmc.crf
.....................\.......\stm32f4xx_fsmc.d
.....................\.......\stm32f4xx_fsmc.o
.....................\.......\stm32f4xx_gpio.crf
.....................\.......\stm32f4xx_gpio.d
.....................\.......\stm32f4xx_gpio.o
.....................\.......\stm32f4xx_hash.crf
.....................\.......\stm32f4xx_hash.d
.....................\.......\stm32f4xx_hash.o
.....................\.......\stm32f4xx_hash_md5.crf
.....................\.......\stm32f4xx_hash_md5.d
.....................\.......\stm32f4xx_hash_md5.o
.....................\.......\stm32f4xx_hash_sha1.crf
.....................\.......\stm32f4xx_hash_sha1.d
.....................\.......\stm32f4xx_hash_sha1.o
.....................\.......\stm32f4xx_i2c.crf
.....................\.......\stm32f4xx_i2c.d
.....................\.......\stm32f4xx_i2c.o
.....................\.......\stm32f4xx_it.crf
.....................\.......\stm32f4xx_it.d
.....................\.......\stm32f4xx_it.o
.....................\.......\stm32f4xx_iwdg.crf
.....................\.......\stm32f4xx_iwdg.d
.....................\.......\stm32f4xx_iwdg.o
.....................\.......\stm32f4xx_pwr.crf
.....................\.......\stm32f4xx_p