based on STM32F7，using I2S send the audio data

Audio
.....\Audio_playback_and_record
.....\.........................\EWARM
.....\.........................\.....\Project.dep
.....\.........................\.....\Project.ewd
.....\.........................\.....\Project.ewp
.....\.........................\.....\Project.eww
.....\.........................\.....\settings
.....\.........................\.....\........\Project.crun
.....\.........................\.....\........\Project.dbgdt
.....\.........................\.....\........\Project.dni
.....\.........................\.....\........\Project.STM32F7-DISCO.cspy.bat
.....\.........................\.....\........\Project.STM32F7-DISCO.driver.xcl
.....\.........................\.....\........\Project.STM32F7-DISCO.general.xcl
.....\.........................\.....\........\Project.wsdt
.....\.........................\.....\........\Project.wspos
.....\.........................\.....\startup_stm32f746xx.s
.....\.........................\.....\STM32F7-DISCO
.....\.........................\.....\.............\Exe
.....\.........................\.....\.............\List
.....\.........................\.....\.............\Obj
.....\.........................\.....\.............\...\explorer.pbi
.....\.........................\.....\.............\...\explorer.pbi.cout
.....\.........................\.....\.............\...\ff.pbi
.....\.........................\.....\.............\...\ff.pbi.cout
.....\.........................\.....\.............\...\ft5336.pbi
.....\.........................\.....\.............\...\ft5336.pbi.cout
.....\.........................\.....\.............\...\lcd_log.pbi
.....\.........................\.....\.............\...\lcd_log.pbi.cout
.....\.........................\.....\.............\...\main.pbi
.....\.........................\.....\.............\...\main.pbi.cout
.....\.........................\.....\.............\...\menu.pbi
.....\.........................\.....\.............\...\menu.pbi.cout
.....\.........................\.....\.............\...\Project.pbd
.....\.........................\.....\.............\...\Project.pbd.browse
.....\.........................\.....\.............\...\stm32746g_discovery.pbi
.....\.........................\.....\.............\...\stm32746g_discovery.pbi.cout
.....\.........................\.....\.............\...\stm32746g_discovery_audio.pbi
.....\.........................\.....\.............\...\stm32746g_discovery_audio.pbi.cout
.....\.........................\.....\.............\...\stm32746g_discovery_lcd.pbi
.....\.........................\.....\.............\...\stm32746g_discovery_lcd.pbi.cout
.....\.........................\.....\.............\...\stm32746g_discovery_sdram.pbi
.....\.........................\.....\.............\...\stm32746g_discovery_sdram.pbi.cout
.....\.........................\.....\.............\...\stm32746g_discovery_ts.pbi
.....\.........................\.....\.............\...\stm32746g_discovery_ts.pbi.cout
.....\.........................\.....\.............\...\stm32f7xx_hal.pbi
.....\.........................\.....\.............\...\stm32f7xx_hal.pbi.cout
.....\.........................\.....\.............\...\stm32f7xx_hal_cortex.pbi
.....\.........................\.....\.............\...\stm32f7xx_hal_cortex.pbi.cout
.....\.........................\.....\.............\...\stm32f7xx_hal_dma.pbi
.....\.........................\.....\.............\...\stm32f7xx_hal_dma.pbi.cout
.....\.........................\.....\.............\...\stm32f7xx_hal_dma2d.pbi
.....\.........................\.....\.............\...\stm32f7xx_hal_dma2d.pbi.cout
.....\.........................\.....\.............\...\stm32f7xx_hal_dma_ex.pbi
.....\.........................\.....\.............\...\stm32f7xx_hal_dma_ex.pbi.cout
.....\.........................\.....\.............\...\stm32f7xx_hal_flash.pbi
.....\.........................\.....\.............\...\stm32f7xx_hal_flash.pbi.cout
.....\.........................\.....\.............\...\stm32f7xx_hal_flash_ex.pbi
.....\.........................\.....\.............\...\s

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