https://devzone.nordicsemi.com/f/nordic-q-a/113136/i-want-to-change-the-i2s-bit-width-to-24-bitsCurrently, the nRF5340 Audio is set up and running as follows: In CIS mode, the audio source is I2S Gateway side: nRF5340 Audio DK I2S settings are default Headset side: custom board I2S settings are as follows static nrfx_i2s_config_t cfg = { .skip_gpio_cfgen-USTelligent Community 13Fri, 19 Jul 2024 14:42:35 GMThttps://devzone.nordicsemi.com/thread/494848?ContentTypeID=1Fri, 19 Jul 2024 14:42:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e1273c63-0aa3-4a82-a1a2-1851e5a2c5d4Maria Gilje<p>Hello,</p> <p>I&#39;m expanding a little on what Turbo J wrote.</p> <p>The I2S configuration is validated with the <a href="https://github.com/zephyrproject-rtos/hal_nordic/blob/master/nrfx/drivers/src/nrfx_i2s.c#L176">validate_config</a>() function and will return false if the MCK/LRCK ratio is not a multiple of 2*sample width. Since the sample width is 24 bit, the ratio needs to be 48, 96, 192, or 384.</p> <p>For now only <a href="https://github.com/nrfconnect/sdk-nrf/blob/main/applications/nrf5340_audio/src/modules/audio_i2s.c#L53-L59">bitdepths of 16 and 24</a> are supported.</p> <p>Best regards,</p> <p>Maria</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/494309?ContentTypeID=1Wed, 17 Jul 2024 10:06:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:40975722-88f5-49f6-9b2b-576d15d1a643Turbo J<p>Might be PS chapter 7.15.5: &quot;The MCK/LRCK ratio shall be a multiple of 2*CONFIG.SWIDTH&quot;.</p> <p>Your 256x ratio is AFAIK not a multiple.</p><div style="clear:both;"></div>