diff --git a/audioooo/lib/ESP32-audioI2S b/audioooo/lib/ESP32-audioI2S
index 5d289fd..8259da0 160000
--- a/audioooo/lib/ESP32-audioI2S
+++ b/audioooo/lib/ESP32-audioI2S
@@ -1 +1 @@
-Subproject commit 5d289fd8151796d5c1861b02360d3a8c8971fea0
+Subproject commit 8259da0693a27982ef16774aa95fc321e78912ec
diff --git a/audioooo/platformio.ini b/audioooo/platformio.ini
index d93d430..2b8d88c 100644
--- a/audioooo/platformio.ini
+++ b/audioooo/platformio.ini
@@ -9,7 +9,7 @@
 ; https://docs.platformio.org/page/projectconf.html
 
 [env:esp32dev]
-platform = espressif32
+platform = espressif32@3.5.0 ; <-- latest version sd R/W too slow!
 board = esp32dev
 framework = arduino
 lib_deps =