diff --git a/main/gay-ipod-fw.cpp b/main/gay-ipod-fw.cpp
index 1c232f20..69c0f87f 100644
--- a/main/gay-ipod-fw.cpp
+++ b/main/gay-ipod-fw.cpp
@@ -17,6 +17,7 @@
 #include "driver/sdspi_host.h"
 #include "driver/spi_common.h"
 #include "driver/spi_master.h"
+#include "esp_heap_trace.h"
 #include "esp_intr_alloc.h"
 #include "esp_log.h"
 #include "hal/gpio_types.h"
@@ -89,6 +90,7 @@ extern "C" void app_main(void) {
   ESP_ERROR_CHECK(gpio_install_isr_service(ESP_INTR_FLAG_LOWMED));
   init_i2c();
   init_spi();
+  ESP_ERROR_CHECK(gay_ipod::init_adc());
 
   ESP_LOGI(TAG, "Init GPIOs");
   gay_ipod::GpioExpander expander;
@@ -96,9 +98,6 @@ extern "C" void app_main(void) {
   // for debugging usb ic
   // expander.set_sd_mux(gay_ipod::GpioExpander::USB);
 
-  ESP_LOGI(TAG, "Init ADC");
-  ESP_ERROR_CHECK(gay_ipod::init_adc());
-
   ESP_LOGI(TAG, "Init SD card");
   auto storage_res = gay_ipod::SdStorage::create(&expander);
   if (storage_res.has_error()) {
@@ -130,7 +129,7 @@ extern "C" void app_main(void) {
   playback->Play("/sdcard/test.mp3");
   playback->set_volume(100);
 
-  playback->WaitForSongEnd();
+  playback->ProcessEvents();
 
   ESP_LOGI(TAG, "Time to deinit.");
 
diff --git a/main/playback.cpp b/main/playback.cpp
index 29fa5829..401dc9a3 100644
--- a/main/playback.cpp
+++ b/main/playback.cpp
@@ -9,6 +9,7 @@
 #include "audio_pipeline.h"
 #include "driver/i2s.h"
 #include "esp_err.h"
+#include "freertos/portmacro.h"
 #include "mp3_decoder.h"
 
 static const char* kTag = "PLAYBACK";
@@ -16,28 +17,13 @@ static const i2s_port_t kI2SPort = I2S_NUM_0;
 
 namespace gay_ipod {
 
-// Static functions for interrop with the ESP IDF API, which requires a
-// function pointer.
-namespace callback {
-static DacAudioPlayback* instance = nullptr;
-
-// Fits the required function pointer signature, but just delegates to the
-// wrapper function. Does that make this the wrapper? Who knows.
-__attribute__((unused))  // (gcc incorrectly thinks this is unused)
-static esp_err_t
-on_event(audio_event_iface_msg_t* event, void* data) {
-  if (instance == nullptr) {
-    ESP_LOGW(kTag, "uncaught ADF event, type %x", event->cmd);
-    return ESP_OK;
-  }
-  return instance->HandleEvent(event, data);
+static audio_element_status_t status_from_the_void(void *status) {
+  uintptr_t as_pointer_int = reinterpret_cast<uintptr_t>(status);
+  return static_cast<audio_element_status_t>(as_pointer_int);
 }
-}  // namespace callback
 
 auto DacAudioPlayback::create(AudioDac* dac)
     -> cpp::result<std::unique_ptr<DacAudioPlayback>, Error> {
-  assert(callback::instance == nullptr);
-
   // Ensure we're soft-muted before initialising, in order to reduce protential
   // clicks and pops.
   dac->WriteVolume(255);
@@ -119,9 +105,12 @@ auto DacAudioPlayback::create(AudioDac* dac)
   assert(mp3_decoder != NULL);
 
   audio_event_iface_cfg_t event_config = AUDIO_EVENT_IFACE_DEFAULT_CFG();
-  event_config.on_cmd = &callback::on_event;
   event_interface = audio_event_iface_init(&event_config);
+
   audio_pipeline_set_listener(pipeline, event_interface);
+  audio_element_msg_set_listener(fatfs_stream_reader, event_interface);
+  audio_element_msg_set_listener(mp3_decoder, event_interface);
+  audio_element_msg_set_listener(i2s_stream_writer, event_interface);
 
   // TODO: most of this is likely post-init, since it involves a decoder.
   // All the elements of our pipeline have been initialised. Now switch them
@@ -149,15 +138,15 @@ DacAudioPlayback::DacAudioPlayback(AudioDac* dac,
       fatfs_stream_reader_(fatfs_stream_reader),
       i2s_stream_writer_(i2s_stream_writer),
       event_interface_(event_interface),
-      mp3_decoder_(mp3_decoder) {
-  callback::instance = this;
-}
+      mp3_decoder_(mp3_decoder) {}
 
 DacAudioPlayback::~DacAudioPlayback() {
   dac_->WriteVolume(255);
 
   audio_pipeline_remove_listener(pipeline_);
-  callback::instance = nullptr;
+  audio_element_msg_remove_listener(fatfs_stream_reader_, event_interface_);
+  audio_element_msg_remove_listener(mp3_decoder_, event_interface_);
+  audio_element_msg_remove_listener(i2s_stream_writer_, event_interface_);
 
   audio_pipeline_stop(pipeline_);
   audio_pipeline_wait_for_stop(pipeline_);
@@ -190,14 +179,49 @@ void DacAudioPlayback::Pause() {
   // TODO.
 }
 
-void DacAudioPlayback::WaitForSongEnd() {
+void DacAudioPlayback::ProcessEvents() {
   while (1) {
-    audio_element_state_t state = audio_element_get_state(i2s_stream_writer_);
-    if (state == AEL_STATE_FINISHED) {
-      return;
+    audio_event_iface_msg_t event;
+    esp_err_t err = audio_event_iface_listen(event_interface_, &event, portMAX_DELAY);
+    if (err != ESP_OK) {
+      ESP_LOGI(kTag, "error listening for event:%x", err);
+      continue;
+    }
+    ESP_LOGI(kTag, "received event, cmd %i", event.cmd);
+
+    if (event.source_type == AUDIO_ELEMENT_TYPE_ELEMENT
+	&& event.source == (void *) mp3_decoder_
+	&& event.cmd == AEL_MSG_CMD_REPORT_MUSIC_INFO) {
+      audio_element_info_t music_info = {0};
+      audio_element_getinfo(mp3_decoder_, &music_info);
+      ESP_LOGI(kTag, "sample_rate=%d, bits=%d, ch=%d", music_info.sample_rates, music_info.bits, music_info.channels);
+      audio_element_setinfo(i2s_stream_writer_, &music_info);
+      i2s_stream_set_clk(i2s_stream_writer_, music_info.sample_rates, music_info.bits, music_info.channels);
+    }
+
+    if (event.source_type == AUDIO_ELEMENT_TYPE_ELEMENT
+	&& event.source == (void *) fatfs_stream_reader_
+	&& event.cmd == AEL_MSG_CMD_REPORT_STATUS) {
+      audio_element_status_t status = status_from_the_void(event.data);
+      if (status == AEL_STATUS_STATE_FINISHED) {
+      // TODO: enqueue next track?
+      }
+    }
+
+    if (event.source_type == AUDIO_ELEMENT_TYPE_ELEMENT
+	&& event.source == (void *) i2s_stream_writer_
+	&& event.cmd == AEL_MSG_CMD_REPORT_STATUS) {
+      audio_element_status_t status = status_from_the_void(event.data);
+      if (status == AEL_STATUS_STATE_FINISHED) {
+	// TODO.
+	return;
+      }
     }
 
-    vTaskDelay(pdMS_TO_TICKS(1000));
+    if (event.need_free_data) {
+      ESP_LOGI(kTag, "freeing event data");
+      free(event.data);
+    }
   }
 }
 
@@ -216,10 +240,4 @@ auto DacAudioPlayback::volume() -> uint8_t {
   return volume_;
 }
 
-auto DacAudioPlayback::HandleEvent(audio_event_iface_msg_t* event, void* data)
-    -> esp_err_t {
-  ESP_LOGI(kTag, "got event!");
-  return ESP_OK;
-}
-
 }  // namespace gay_ipod
diff --git a/main/playback.hpp b/main/playback.hpp
index 88eca5ae..88336105 100644
--- a/main/playback.hpp
+++ b/main/playback.hpp
@@ -37,8 +37,7 @@ class DacAudioPlayback {
   void Resume();
   void Pause();
 
-  // For debug :)
-  void WaitForSongEnd();
+  void ProcessEvents();
 
   /* for gapless */
   void set_next_file(const std::string& filename);
@@ -46,8 +45,6 @@ class DacAudioPlayback {
   void set_volume(uint8_t volume);
   auto volume() -> uint8_t;
 
-  auto HandleEvent(audio_event_iface_msg_t* event, void* data) -> esp_err_t;
-
   // Not copyable or movable.
   DacAudioPlayback(const DacAudioPlayback&) = delete;
   DacAudioPlayback& operator=(const DacAudioPlayback&) = delete;
diff --git a/sdkconfig b/sdkconfig
index 5f4c8ecd..ce84fa01 100644
--- a/sdkconfig
+++ b/sdkconfig
@@ -70,6 +70,7 @@ CONFIG_BOOTLOADER_FLASH_XMC_SUPPORT=y
 #
 # Security features
 #
+CONFIG_SECURE_BOOT_SUPPORTS_RSA=y
 # CONFIG_SECURE_SIGNED_APPS_NO_SECURE_BOOT is not set
 # CONFIG_SECURE_BOOT is not set
 # CONFIG_SECURE_FLASH_ENC_ENABLED is not set
@@ -167,18 +168,9 @@ CONFIG_REC_ENG_ENABLE_VAD_WWE_AMR=y
 #
 # ESP Speech Recognition
 #
-CONFIG_USE_AFE=y
-CONFIG_AFE_INTERFACE_V1=y
-CONFIG_USE_WAKENET=y
-CONFIG_SR_WN_WN5_HILEXIN=y
-# CONFIG_SR_WN_WN5X3_HILEXIN is not set
-# CONFIG_SR_WN_WN5_NIHAOXIAOZHI is not set
-# CONFIG_SR_WN_WN5X3_NIHAOXIAOZHI is not set
-# CONFIG_SR_WN_WN5X3_NIHAOXIAOXIN is not set
-CONFIG_USE_MULTINET=y
-CONFIG_SR_MN_CN_NONE=y
-# CONFIG_SR_MN_CN_MULTINET2_SINGLE_RECOGNITION is not set
-CONFIG_SR_MN_EN_NONE=y
+# CONFIG_USE_AFE is not set
+# CONFIG_USE_WAKENET is not set
+# CONFIG_USE_MULTINET is not set
 # end of ESP Speech Recognition
 
 #
@@ -333,17 +325,73 @@ CONFIG_ESP_TLS_USING_MBEDTLS=y
 #
 # ESP32-specific
 #
-CONFIG_ESP32_REV_MIN_0=y
+CONFIG_ESP32_ECO3_CACHE_LOCK_FIX=y
+# CONFIG_ESP32_REV_MIN_0 is not set
 # CONFIG_ESP32_REV_MIN_1 is not set
 # CONFIG_ESP32_REV_MIN_2 is not set
-# CONFIG_ESP32_REV_MIN_3 is not set
-CONFIG_ESP32_REV_MIN=0
-CONFIG_ESP32_DPORT_WORKAROUND=y
+CONFIG_ESP32_REV_MIN_3=y
+CONFIG_ESP32_REV_MIN=3
 # CONFIG_ESP32_DEFAULT_CPU_FREQ_80 is not set
-CONFIG_ESP32_DEFAULT_CPU_FREQ_160=y
-# CONFIG_ESP32_DEFAULT_CPU_FREQ_240 is not set
-CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ=160
-# CONFIG_ESP32_SPIRAM_SUPPORT is not set
+# CONFIG_ESP32_DEFAULT_CPU_FREQ_160 is not set
+CONFIG_ESP32_DEFAULT_CPU_FREQ_240=y
+CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ=240
+CONFIG_ESP32_SPIRAM_SUPPORT=y
+
+#
+# SPI RAM config
+#
+CONFIG_SPIRAM_TYPE_AUTO=y
+# CONFIG_SPIRAM_TYPE_ESPPSRAM16 is not set
+# CONFIG_SPIRAM_TYPE_ESPPSRAM32 is not set
+# CONFIG_SPIRAM_TYPE_ESPPSRAM64 is not set
+CONFIG_SPIRAM_SIZE=-1
+CONFIG_SPIRAM_SPEED_40M=y
+CONFIG_SPIRAM=y
+CONFIG_SPIRAM_BOOT_INIT=y
+# CONFIG_SPIRAM_USE_MEMMAP is not set
+# CONFIG_SPIRAM_USE_CAPS_ALLOC is not set
+CONFIG_SPIRAM_USE_MALLOC=y
+CONFIG_SPIRAM_MEMTEST=y
+CONFIG_SPIRAM_MALLOC_ALWAYSINTERNAL=16384
+CONFIG_SPIRAM_TRY_ALLOCATE_WIFI_LWIP=y
+CONFIG_SPIRAM_MALLOC_RESERVE_INTERNAL=32768
+CONFIG_SPIRAM_ALLOW_BSS_SEG_EXTERNAL_MEMORY=y
+CONFIG_SPIRAM_ALLOW_NOINIT_SEG_EXTERNAL_MEMORY=y
+
+#
+# SPIRAM cache workaround debugging
+#
+# end of SPIRAM cache workaround debugging
+
+CONFIG_SPIRAM_BANKSWITCH_ENABLE=y
+CONFIG_SPIRAM_BANKSWITCH_RESERVE=8
+# CONFIG_SPIRAM_ALLOW_STACK_EXTERNAL_MEMORY is not set
+
+#
+# PSRAM clock and cs IO for ESP32-DOWD
+#
+CONFIG_D0WD_PSRAM_CLK_IO=17
+CONFIG_D0WD_PSRAM_CS_IO=16
+# end of PSRAM clock and cs IO for ESP32-DOWD
+
+#
+# PSRAM clock and cs IO for ESP32-D2WD
+#
+CONFIG_D2WD_PSRAM_CLK_IO=9
+CONFIG_D2WD_PSRAM_CS_IO=10
+# end of PSRAM clock and cs IO for ESP32-D2WD
+
+#
+# PSRAM clock and cs IO for ESP32-PICO
+#
+CONFIG_PICO_PSRAM_CS_IO=10
+# end of PSRAM clock and cs IO for ESP32-PICO
+
+# CONFIG_SPIRAM_CUSTOM_SPIWP_SD3_PIN is not set
+CONFIG_SPIRAM_SPIWP_SD3_PIN=7
+# CONFIG_SPIRAM_2T_MODE is not set
+# end of SPI RAM config
+
 # CONFIG_ESP32_TRAX is not set
 CONFIG_ESP32_TRACEMEM_RESERVE_DRAM=0x0
 # CONFIG_ESP32_ULP_COPROC_ENABLED is not set
@@ -393,6 +441,7 @@ CONFIG_ADC_CAL_LUT_ENABLE=y
 # Common ESP-related
 #
 CONFIG_ESP_ERR_TO_NAME_LOOKUP=y
+CONFIG_ESP_ALLOW_BSS_SEG_EXTERNAL_MEMORY=y
 # end of Common ESP-related
 
 #
@@ -477,9 +526,9 @@ CONFIG_ESP32_UNIVERSAL_MAC_ADDRESSES=4
 #
 # Sleep Config
 #
-# CONFIG_ESP_SLEEP_POWER_DOWN_FLASH is not set
 CONFIG_ESP_SLEEP_RTC_BUS_ISO_WORKAROUND=y
 # CONFIG_ESP_SLEEP_GPIO_RESET_WORKAROUND is not set
+CONFIG_ESP_SLEEP_PSRAM_LEAKAGE_WORKAROUND=y
 CONFIG_ESP_SLEEP_FLASH_LEAKAGE_WORKAROUND=y
 # CONFIG_ESP_SLEEP_MSPI_NEED_ALL_IO_PU is not set
 # end of Sleep Config
@@ -603,15 +652,16 @@ CONFIG_ESP_TIMER_IMPL_TG0_LAC=y
 CONFIG_ESP32_WIFI_ENABLED=y
 CONFIG_ESP32_WIFI_STATIC_RX_BUFFER_NUM=10
 CONFIG_ESP32_WIFI_DYNAMIC_RX_BUFFER_NUM=32
-# CONFIG_ESP32_WIFI_STATIC_TX_BUFFER is not set
-CONFIG_ESP32_WIFI_DYNAMIC_TX_BUFFER=y
-CONFIG_ESP32_WIFI_TX_BUFFER_TYPE=1
-CONFIG_ESP32_WIFI_DYNAMIC_TX_BUFFER_NUM=32
+CONFIG_ESP32_WIFI_STATIC_TX_BUFFER=y
+CONFIG_ESP32_WIFI_TX_BUFFER_TYPE=0
+CONFIG_ESP32_WIFI_STATIC_TX_BUFFER_NUM=16
+CONFIG_ESP32_WIFI_CACHE_TX_BUFFER_NUM=32
 # CONFIG_ESP32_WIFI_CSI_ENABLED is not set
 CONFIG_ESP32_WIFI_AMPDU_TX_ENABLED=y
 CONFIG_ESP32_WIFI_TX_BA_WIN=6
 CONFIG_ESP32_WIFI_AMPDU_RX_ENABLED=y
 CONFIG_ESP32_WIFI_RX_BA_WIN=6
+# CONFIG_ESP32_WIFI_AMSDU_TX_ENABLED is not set
 CONFIG_ESP32_WIFI_NVS_ENABLED=y
 CONFIG_ESP32_WIFI_TASK_PINNED_TO_CORE_0=y
 # CONFIG_ESP32_WIFI_TASK_PINNED_TO_CORE_1 is not set
@@ -661,12 +711,17 @@ CONFIG_FATFS_CODEPAGE_437=y
 # CONFIG_FATFS_CODEPAGE_949 is not set
 # CONFIG_FATFS_CODEPAGE_950 is not set
 CONFIG_FATFS_CODEPAGE=437
-CONFIG_FATFS_LFN_NONE=y
-# CONFIG_FATFS_LFN_HEAP is not set
+# CONFIG_FATFS_LFN_NONE is not set
+CONFIG_FATFS_LFN_HEAP=y
 # CONFIG_FATFS_LFN_STACK is not set
+CONFIG_FATFS_MAX_LFN=255
+CONFIG_FATFS_API_ENCODING_ANSI_OEM=y
+# CONFIG_FATFS_API_ENCODING_UTF_16 is not set
+# CONFIG_FATFS_API_ENCODING_UTF_8 is not set
 CONFIG_FATFS_FS_LOCK=0
 CONFIG_FATFS_TIMEOUT_MS=10000
 CONFIG_FATFS_PER_FILE_CACHE=y
+CONFIG_FATFS_ALLOC_PREFER_EXTRAM=y
 # CONFIG_FATFS_USE_FASTSEEK is not set
 # end of FAT Filesystem support
 
@@ -870,6 +925,7 @@ CONFIG_LWIP_TCP_QUEUE_OOSEQ=y
 CONFIG_LWIP_TCP_OVERSIZE_MSS=y
 # CONFIG_LWIP_TCP_OVERSIZE_QUARTER_MSS is not set
 # CONFIG_LWIP_TCP_OVERSIZE_DISABLE is not set
+# CONFIG_LWIP_WND_SCALE is not set
 CONFIG_LWIP_TCP_RTO_TIME=1500
 # end of TCP
 
@@ -946,6 +1002,7 @@ CONFIG_LWIP_HOOK_NETCONN_EXT_RESOLVE_NONE=y
 # mbedTLS
 #
 CONFIG_MBEDTLS_INTERNAL_MEM_ALLOC=y
+# CONFIG_MBEDTLS_EXTERNAL_MEM_ALLOC is not set
 # CONFIG_MBEDTLS_DEFAULT_MEM_ALLOC is not set
 # CONFIG_MBEDTLS_CUSTOM_MEM_ALLOC is not set
 CONFIG_MBEDTLS_ASYMMETRIC_CONTENT_LEN=y
@@ -1338,7 +1395,8 @@ CONFIG_STACK_CHECK_NONE=y
 CONFIG_ESP32_APPTRACE_DEST_NONE=y
 CONFIG_ESP32_APPTRACE_LOCK_ENABLE=y
 CONFIG_ADC2_DISABLE_DAC=y
-# CONFIG_SPIRAM_SUPPORT is not set
+CONFIG_SPIRAM_SUPPORT=y
+CONFIG_WIFI_LWIP_ALLOCATION_FROM_SPIRAM_FIRST=y
 CONFIG_TRACEMEM_RESERVE_DRAM=0x0
 # CONFIG_ULP_COPROC_ENABLED is not set
 CONFIG_ULP_COPROC_RESERVE_MEM=0
@@ -1365,7 +1423,6 @@ CONFIG_POST_EVENTS_FROM_IRAM_ISR=y
 # CONFIG_TWO_UNIVERSAL_MAC_ADDRESS is not set
 CONFIG_FOUR_UNIVERSAL_MAC_ADDRESS=y
 CONFIG_NUMBER_OF_UNIVERSAL_MAC_ADDRESS=4
-# CONFIG_ESP_SYSTEM_PD_FLASH is not set
 # CONFIG_ESP32C3_LIGHTSLEEP_GPIO_RESET_WORKAROUND is not set
 CONFIG_IPC_TASK_STACK_SIZE=1536
 CONFIG_ESP32_PHY_CALIBRATION_AND_DATA_STORAGE=y