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diff --git a/firmware/target/arm/as3525/pcm-as3525.c b/firmware/target/arm/as352
index 53a3f0c..fa9eaf8 100644
--- a/firmware/target/arm/as3525/pcm-as3525.c
+++ b/firmware/target/arm/as3525/pcm-as3525.c
@@ -125,6 +125,7 @@ void pcm_play_dma_init(void)
     CGU_PERI |= CGU_I2SOUT_APB_CLOCK_ENABLE;

     I2SOUT_CONTROL = (1<<6)|(1<<3)  /* enable dma, stereo */;
+    I2SIN_CONTROL = 1<<4; /* disable SCLK for i2sinif */

     audiohw_preinit();
 }