---

#define SAMPLE_FREQUENCY    16000
#define NUMBER_OF_CHANNELS  1
#endif
#define SAMPLE_BIT_WIDTH    16
#define BYTES_PER_SAMPLE    sizeof(int16_t)
/* Such block length provides an echo with the delay of 100 ms. */
#define SAMPLES_PER_BLOCK   ((SAMPLE_FREQUENCY / 10) * NUMBER_OF_CHANNELS)
#define ZEPHYR_AUDIO_BLOCK_SIZE  (BYTES_PER_SAMPLE * SAMPLES_PER_BLOCK)
#define ZEPHYR_AUDIO_INITIAL_BLOCKS 2
//#define ZEPHYR_AUDIO_BLOCK_COUNT ZEPHYR_AUDIO_INITIAL_BLOCKS + 4
#define ZEPHYR_AUDIO_BLOCK_COUNT ZEPHYR_AUDIO_INITIAL_BLOCKS + 32

typedef void I2S_Stream;

int zephyr_i2s_audio_init(void);
int zephyr_i2s_get_rate();
int zephyr_i2s_open_stream(I2S_Stream **stream, uint8_t *buf, uint8_t audio_in);
int zephyr_i2s_close_stream(I2S_Stream *stream);
int zephyr_i2s_start(uint8_t audio_in);
int zephyr_i2s_stop(uint8_t audio_in);

K_MEM_SLAB_DEFINE_IN_SECT_STATIC(mem_slab, __dtcm_noinit_section, ZEPHYR_AUDIO_BLOCK_SIZE, ZEPHYR_AUDIO_BLOCK_COUNT, 4);

int zephyr_i2s_audio_init(void)
{
    struct i2s_config config;

#if DT_NODE_HAS_STATUS(DT_NODELABEL(audio_codec), okay)
    const struct device *const codec_dev = DEVICE_DT_GET(DT_NODELABEL(audio_codec));
    struct audio_codec_cfg audio_cfg;

    audio_cfg.dai_route = AUDIO_ROUTE_PLAYBACK_CAPTURE;
    audio_cfg.dai_type = AUDIO_DAI_TYPE_I2S;
    audio_cfg.dai_cfg.i2s.word_size = SAMPLE_BIT_WIDTH;
    audio_cfg.dai_cfg.i2s.channels = NUMBER_OF_CHANNELS;
    audio_cfg.dai_cfg.i2s.format = I2S_FMT_DATA_FORMAT_I2S;
    audio_cfg.dai_cfg.i2s.options = I2S_OPT_FRAME_CLK_MASTER;
    audio_cfg.dai_cfg.i2s.frame_clk_freq = SAMPLE_FREQUENCY;
    audio_cfg.dai_cfg.i2s.mem_slab = &mem_slab;
    audio_cfg.dai_cfg.i2s.block_size = ZEPHYR_AUDIO_BLOCK_SIZE;

    audio_codec_configure(codec_dev, &audio_cfg);
    k_msleep(1000);
#else
    printf("No found audio_codec int DTS!!! Error\n");
    return -1;
#endif

    if (!device_is_ready(i2s_dev_rx))
    {
        printk("%s is not ready\n", i2s_dev_rx->name);
        return -1;
    }

    if (i2s_dev_rx != i2s_dev_tx && !device_is_ready(i2s_dev_tx))
    {
        printk("%s is not ready\n", i2s_dev_tx->name);
        return -1;
    }
    config.word_size = SAMPLE_BIT_WIDTH;
    config.channels = NUMBER_OF_CHANNELS;
    config.format = I2S_FMT_DATA_FORMAT_I2S;
    config.options = I2S_OPT_BIT_CLK_MASTER | I2S_OPT_FRAME_CLK_MASTER;
    config.frame_clk_freq = SAMPLE_FREQUENCY;
    config.mem_slab = &mem_slab;
    config.block_size = ZEPHYR_AUDIO_BLOCK_SIZE;
    config.timeout = TIMEOUT;
    if (!configure_streams(i2s_dev_rx, i2s_dev_tx, &config))
    {
        return -1;
    }
    return 0;
}

memslab используется для TX и RX - проанализируй запас размера буфера для i2s in и i2s out