diff --git a/platformio.ini b/platformio.ini
index 38bd705e..91fafac7 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -46,6 +46,8 @@
 default_envs = esp32_4MB_max ; recommended default
 ; default_envs = esp32_16MB_max
 ; default_envs = esp8266_4MB_min
+; default_envs = esp32_4MB_V4_max
+; default_envs = esp32_16MB_V4_max
 ; default_envs = esp32_4MB_PSRAM_max
 ; default_envs = esp32S3_8MB_max
 ; default_envs = wemos_shield_esp32_4MB_max
@@ -633,8 +635,8 @@ build_flags = ${env:esp32_4MB_min_base.build_flags}
 extends = env:esp32_4MB_max_base
 build_flags = ${env:esp32_4MB_max_base.build_flags}
   -D WLED_RELEASE_NAME=esp32_4MB_max ; This will be included in the firmware.bin filename
-; RAM:   [==        ]  24.4% (used 79812 bytes from 327680 bytes)
-; Flash: [========= ]  88.6% (used 1393397 bytes from 1572864 bytes)
+; RAM:   [==        ]  24.4% (used 79804 bytes from 327680 bytes)
+; Flash: [========= ]  88.7% (used 1394813 bytes from 1572864 bytes)
 
 ; esp32_16MB_max: bin entry, uses esp32_4MB_max_base and adds 16MB settings
 [env:esp32_16MB_max]
@@ -643,8 +645,8 @@ board = esp32_twilord ; "TwilightLord" ESP32 with 16MB Flash
 board_build.partitions = tools/WLED_ESP32_16MB.csv ; for esp32_twilord with 16MB flash
 build_flags = ${env:esp32_4MB_max_base.build_flags}
   -D WLED_RELEASE_NAME=esp32_16MB_max ; This will be included in the firmware.bin filename
-; RAM:   [==        ]  24.4% (used 79812 bytes from 327680 bytes)
-; Flash: [=======   ]  66.4% (used 1393397 bytes from 2097152 bytes)
+; RAM:   [==        ]  24.4% (used 79804 bytes from 327680 bytes)
+; Flash: [=======   ]  66.5% (used 1394813 bytes from 2097152 bytes)
 
 ; esp8266_4MB_min: bin entry for 8266, with 2D (WIP)
 [env:esp8266_4MB_min]
@@ -666,12 +668,39 @@ build_flags = ${common.build_flags_esp8266}
 # ------------------------------------------------------------------------------
 # MoonModules configs for IDF V4.4.x
 # ------------------------------------------------------------------------------
-
-;; experiemtal environment for boards with PSRAM. 
-;; Warning: the build-in LittleFS seems to be "slightly different" from Lorol LittleFS. 
+;; Warning: the build-in LittleFS (arduino-esp32 2.0.x) seems to be "slightly different" from Lorol LittleFS. 
 ;; When upgrading to the new framework, it might be necessary to first do a chip erase (make sure you have a backup of cfg.json and presets.json)
-;; also SpiffsEditor (Async Webserver) has known problems in IDF4.4.x
 
+; esp32_4MB_V4_max: bin entry compiled with ESP-IDF 4.4.1, uses esp32_4MB_V4_max_base
+[env:esp32_4MB_V4_max]
+extends = env:esp32_4MB_V4_max_base
+build_flags = ${env:esp32_4MB_V4_max_base.build_flags}
+  -D WLED_RELEASE_NAME=esp32_4MB_V4_max ; This will be included in the firmware.bin filename
+  -D WLED_WATCHDOG_TIMEOUT=0 #-D WLED_DISABLE_BROWNOUT_DET
+  -D ARDUINO_USB_CDC_ON_BOOT=0 ; needed for arduino-esp32 >=2.0.4; avoids errors on startup
+  ; RAM:   [==        ]  24.8% (used 81316 bytes from 327680 bytes)
+  ; Flash: [==========]  97.2% (used 1528253 bytes from 1572864 bytes)
+  -D WLED_DISABLE_LOXONE ; FLASH 1272 bytes
+  -D WLED_DISABLE_ALEXA ;  RAM 116 bytes; FLASH 13524 bytes
+  -D WLED_DISABLE_HUESYNC ;RAM 122 bytes; FLASH  6308 bytes
+  ; RAM:   [==        ]  24.7% (used 81076 bytes from 327680 bytes)
+  ; Flash: [==========]  95.8% (used 1506893 bytes from 1572864 bytes)
+  ;-D WLED_DISABLE_MQTT ;   RAM 216 bytes; FLASH 16496 bytes
+  ;-D WLED_DISABLE_INFRARED ;RAM 136 bytes; FLASH 24492 bytes
+
+; esp32_16MB_max: bin entry compiled with ESP-IDF 4.4.1, uses esp32_4MB_V4_max_base and adds 16MB settings
+[env:esp32_16MB_V4_max]
+extends = env:esp32_4MB_V4_max_base
+board = esp32_twilord ; "TwilightLord" ESP32 with 16MB Flash
+board_build.partitions = tools/WLED_ESP32_16MB.csv ; for esp32_twilord with 16MB flash
+build_flags = ${env:esp32_4MB_V4_max_base.build_flags}
+  -D WLED_RELEASE_NAME=esp32_16MB_V4_max ; This will be included in the firmware.bin filename
+  -D WLED_WATCHDOG_TIMEOUT=0 #-D WLED_DISABLE_BROWNOUT_DET
+  -D ARDUINO_USB_CDC_ON_BOOT=0 ; needed for arduino-esp32 >=2.0.4; avoids errors on startup
+  ; RAM:   [==        ]  24.8% (used 81316 bytes from 327680 bytes)
+  ; Flash: [=======   ]  72.9% (used 1528253 bytes from 2097152 bytes)
+
+;; experiemtal environment for boards with PSRAM (needs ESP-IDF 4.4.1). 
 ; esp32_4MB_PSRAM_max: bin entry, uses esp32_4MB_V4_max_base and adds specific settings
 [env:esp32_4MB_PSRAM_max]
 extends = env:esp32_4MB_V4_max_base
@@ -679,7 +708,7 @@ board = lolin_d32_pro
 ;board = esp32cam
 build_flags = ${env:esp32_4MB_V4_max_base.build_flags} 
   -D WLED_RELEASE_NAME=esp32_4MB_PSRAM_max
-  -D WLED_WATCHDOG_TIMEOUT=0 #-D WLED_DISABLE_BLYNK #-D WLED_DISABLE_BROWNOUT_DET
+  -D WLED_WATCHDOG_TIMEOUT=0 #-D WLED_DISABLE_BROWNOUT_DET
   -D ARDUINO_USB_CDC_ON_BOOT=0 ; needed for arduino-esp32 >=2.0.4; avoids errors on startup
   -D WLED_USE_PSRAM 
   ; RAM:   [==        ]  24.8% (used 81424 bytes from 327680 bytes)
@@ -690,7 +719,7 @@ build_flags = ${env:esp32_4MB_V4_max_base.build_flags}
   -D WLED_DISABLE_MQTT ;   RAM 216 bytes; FLASH 16496 bytes
   -D WLED_DISABLE_HUESYNC ;RAM 122 bytes; FLASH  6308 bytes
   ; RAM:   [==        ]  24.7% (used 80948 bytes from 327680 bytes)
-  ; Flash: [==========]  97.4% (used 1531857 bytes from 1572864 bytes)
+  ; Flash: [==========]  97.4% (used 1532485 bytes from 1572864 bytes)
   ;-D WLED_DISABLE_INFRARED ;RAM 136 bytes; FLASH 24492 bytes
   ; -D WLED_DEBUG
   ; -D SR_DEBUG
@@ -716,6 +745,7 @@ build_flags =  ${env:esp32_4MB_V4_max_base.build_flags}
   -D HW_PIN_SDA=40
   -D HW_PIN_SCL=41
   -D AUDIOPIN=-1
+  -D DMTYPE=1
   -D I2S_SDPIN=16
   -D I2S_CKPIN=17  
   -D I2S_WSPIN=47
@@ -742,10 +772,15 @@ build_flags = ${env:esp32_4MB_max_base.build_flags}
   -D RLYPIN=19
   -D BTNPIN=17
   -D IRPIN=18
-  -D AUDIOPIN=-1 -D DMTYPE=1 -D I2S_SDPIN=32 -D I2S_WSPIN=15 -D I2S_CKPIN=14
+  -D AUDIOPIN=-1 
+  -D DMTYPE=1 -D I2S_SDPIN=32 -D I2S_WSPIN=15 -D I2S_CKPIN=14                 ;; for regular I2S microphone
+  ; -D DMTYPE=5 -D I2S_SDPIN=32 -D I2S_WSPIN=15 -D I2S_CKPIN=-1                 ;; for I2S PDM microphone
+  ; -D DMTYPE=4 -D MCLK_PIN=0 -D I2S_SDPIN=25 -D I2S_WSPIN=15 -D I2S_CKPIN=14   ;; for audio Line-In shield
   -D TEMPERATURE_PIN=23
   -D FLD_PIN_SCL=22 -D FLD_PIN_SDA=21
+  -D HW_PIN_SCL=22 -D HW_PIN_SDA=21
   ; -D ENCODER_DT_PIN=18 -D ENCODER_CLK_PIN=5 -D ENCODER_SW_PIN=19  
+  ; -D WLED_USE_MY_CONFIG
 
 ;wemos_shield_esp32_4MB_max: bin entry, uses wemos_shield_esp32_4MB_max_base
 [env:wemos_shield_esp32_4MB_max]
@@ -771,10 +806,8 @@ build_flags = ${env:esp32_4MB_max_base.build_flags}
   -D RLYPIN=-1
   -D BTNPIN=-1
   -D IRPIN=-1
-  -D DMTYPE=1
-  -D I2S_SDPIN=25
-  -D I2S_WSPIN=15
-  -D I2S_CKPIN=14
+  -D HW_PIN_SCL=22 -D HW_PIN_SDA=21
+  -D DMTYPE=1 -D I2S_SDPIN=25 -D I2S_WSPIN=15 -D I2S_CKPIN=14
   ; -D MCLK_PIN=0
   ; -D WLED_USE_MY_CONFIG
 ; RAM:   [==        ]  24.4% (used 79804 bytes from 327680 bytes)