multimedia_port.c中的mclk_out_init改成
GLB_Config_AUDIO_PLL_To_451P58M();
GLB_Set_I2S_CLK(ENABLE, 8-1,GLB_I2S_DI_SEL_I2S_DI_INPUT,GLB_I2S_DO_SEL_I2S_DO_OUTPT);
GLB_Set_Chip_Clock_Out3_Sel(GLB_CHIP_CLK_OUT_3_I2S_REF_CLK);
sbc默认44100
blck=44100x16x2
45.158m=44100x16x2x4x8
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