From a13a9ec1a71dac685fe831bd87d259b59997d441 Mon Sep 17 00:00:00 2001
From: Omar Ali Hassan <36759605+OmarAli3@users.noreply.github.com>
Date: Wed, 18 Mar 2020 00:29:36 +0200
Subject: [PATCH] Changing amplitude example to output values in dB

---
 examples/AmplitudeSerialPlotter/AmplitudeSerialPlotter.ino | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/examples/AmplitudeSerialPlotter/AmplitudeSerialPlotter.ino b/examples/AmplitudeSerialPlotter/AmplitudeSerialPlotter.ino
index 3d768a3..394c9e2 100644
--- a/examples/AmplitudeSerialPlotter/AmplitudeSerialPlotter.ino
+++ b/examples/AmplitudeSerialPlotter/AmplitudeSerialPlotter.ino
@@ -49,8 +49,9 @@ void loop() {
   if (amplitudeAnalyzer.available()) {
     // read the new amplitude
     int amplitude = amplitudeAnalyzer.read();
-
-    // print out the amplititude to the serial monitor
-    Serial.println(amplitude);
+    //dB relative to full scale
+    int dpFS = 20 * log10(abs(amplitude));
+    // print out the decibel to the serial monitor
+    Serial.println(dpFS);
   }
 }