From e705df0cbfeb040d96fb1a385edfa5fdfc3f3203 Mon Sep 17 00:00:00 2001
From: Hendrik Langer <dev@xd0.de>
Date: Fri, 21 Apr 2017 16:42:45 +0200
Subject: [PATCH] Don't play random noise on startup

---
 src/sound.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/sound.cpp b/src/sound.cpp
index f1efbea..838119d 100644
--- a/src/sound.cpp
+++ b/src/sound.cpp
@@ -59,6 +59,7 @@ void Sound::init() {
     i2s_driver_install(i2s_num, &i2s_config, 0, NULL);
     i2s_set_pin(i2s_num, &pin_config);
 
+    /* play a sine wave (example code) */
     triangle_float = -32767;
 
     for(i = 0; i < SAMPLE_PER_CYCLE; i++) {
@@ -76,6 +77,8 @@ void Sound::init() {
  
         i2s_push_sample(i2s_num, (char *)&sample_val, portMAX_DELAY);
     }
+
+    stop();
 }
 
 void Sound::play() {