diff --git a/platformio.ini b/platformio.ini
index 44e8d00f..1455b66f 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -936,7 +936,7 @@ build_flags =
 [Athom_PDMmic]
 build_flags = 
   -D SR_DMTYPE=51 -D I2S_SDPIN=32 -D I2S_WSPIN=15 -D I2S_CKPIN=-1 ; for I2S PDM microphone Legacy mode!
-  -D SR_SQUELCH=3 -D SR_GAIN=75 -D SR_FREQ_PROF=7                ; SPM1423 specific
+  -D SR_SQUELCH=10 -D SR_GAIN=40 -D SR_FREQ_PROF=7                ; SPM1423 specific
 
 [Shield_LineIn]
 build_flags =