Make the drain buffer very large, and move it into PSRAM
the i2s handler and streambuffer metadata are both still in iram for good performance. otherwise, this seems to be enough to make gapless playback work.
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@@ -22,7 +22,6 @@ CONFIG_SPI_MASTER_IN_IRAM=y
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# CONFIG_TWAI_ERRATA_FIX_RX_FIFO_CORRUPT is not set
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# CONFIG_TWAI_ERRATA_FIX_LISTEN_ONLY_DOM is not set
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CONFIG_GPIO_CTRL_FUNC_IN_IRAM=y
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CONFIG_I2S_ISR_IRAM_SAFE=y
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# CONFIG_ETH_USE_ESP32_EMAC is not set
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# CONFIG_ETH_USE_SPI_ETHERNET is not set
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# CONFIG_ESP_EVENT_POST_FROM_ISR is not set
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