https://devzone.nordicsemi.com/f/nordic-q-a/128272/audio-is-not-getI am interfacing a TLV320AIC3204 codec EVM with an nRF54L15 board using I2S. The codec EVM default configuration is working correctly. I verified audio on the EVM side. Current clock configuration: MCLK = 12 MHz BCLK = 3 MHz LRCKen-USTelligent Community 13Thu, 28 May 2026 12:29:55 GMThttps://devzone.nordicsemi.com/thread/567041?ContentTypeID=1Thu, 28 May 2026 12:29:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:24998d6c-77f1-474c-9df1-54d06c2057e4Einar Thorsrud<p>Hi,</p> <p>I am not able to say much for sure, but there&nbsp;is one thing that sticks out. BCLK ratio looks off For stereo I2S at 48 kHz you need BCLK = 48k × 2 × WS = 1.536 MHz (16-bit) or 3.072 MHz (32-bit). 3.000 MHz isn&#39;t a valid frame length and the I2S peripheral won&#39;t latch valid samples. Double-check your codec BCLK divider (Page 0, Reg 30) — with BDIV=2 from a typical DAC_CLK path you should be getting 3.072 MHz, not 3.000 MHz.</p> <p>Other than that,</p> <ol> <li>can you share your configuration (most relevant&nbsp;pincontrol and devicetree)?</li> <li>Which debugging have you done?</li> <li>If you observe the I2S lines with a logic analyzer that can analyze I2S, what do you see? Do you see clocks as expected? What about data?</li> <li>Are there runtime errors? If so, which?</li> <li>Are there build warnings, if so which?</li> </ol><div style="clear:both;"></div>