diff --git a/src/hdmi/CMakeLists.txt b/src/hdmi/CMakeLists.txt
index c27d73a..109c96e 100644
--- a/src/hdmi/CMakeLists.txt
+++ b/src/hdmi/CMakeLists.txt
@@ -578,18 +578,12 @@ set(murmulator2_common_defines
 
 set(murmulator2_pwm_audio_defines
   #
-  # This could be ABC output on GPIO 9, 10, 11 but the sofware FIFO is not working on the RP2350
+  # This could be ABC output on GPIO 10, 9, 11 but the sofware FIFO is not working on the RP2350
   # For now I will output mono PWM using a PIO block on GPIO 10
   #
   PICO_AUDIO_PWM_PIO=pio1
   PICO_PIO_PWM_AUDIO
-  SPK_PIN=10
-  # STEREO AY audio
-#  AY8912_ABC_STEREO
-  # Left chanel audio out
-#  AY8912_A_PIN=9
-  # Right chanel audio out
-#  AY8912_C_PIN=11
+  SPK_PIN=9
 )
 
 set (zxspectrum_murmulator2_i2saudio_defines
diff --git a/src/vga/CMakeLists.txt b/src/vga/CMakeLists.txt
index e16cd6b..8c5c4a6 100644
--- a/src/vga/CMakeLists.txt
+++ b/src/vga/CMakeLists.txt
@@ -228,7 +228,7 @@ foreach(target
   pico_generate_pio_header(${target} 
     ${zxspectrum_pwm_pio}
   )
-  
+
   pico_enable_stdio_usb(${target} 0)
 
   # create map/bin/hex file etc.
@@ -386,18 +386,12 @@ set(ZX-MURMULATOR2_VGA_defines
 
 set(ZX-MURMULATOR2_VGA_PWM_Audio_defines
   #
-  # This could be ABC output on GPIO 9, 10, 11 but the sofware FIFO is not working on the RP2350
+  # This could be ABC output on GPIO 10, 9, 11 but the sofware FIFO is not working on the RP2350
   # For now I will output mono PWM using a PIO block on GPIO 10
   #
   PICO_AUDIO_PWM_PIO=pio1
   PICO_PIO_PWM_AUDIO
-  SPK_PIN=10
-  # STEREO AY audio
-#  AY8912_ABC_STEREO
-  # Left chanel audio out
-#  AY8912_A_PIN=9
-  # Right chanel audio out
-#  AY8912_C_PIN=11
+  SPK_PIN=9
 )
 
 set (ZX-MURMULATOR2_VGA_I2S_Audio_defines