diff --git a/campatmo.py b/campatmo.py
index 00ccac4..f4fcb13 100755
--- a/campatmo.py
+++ b/campatmo.py
@@ -3,8 +3,9 @@ import time
 import sys
 import random
 from glob import glob
-from pygame import mixer
+from threading import Thread
 from typing import Union, List, Mapping
+from pygame import mixer
 
 from atmorepl import AtmoReplRunner
 
@@ -83,9 +84,25 @@ class CampAtmo:
     line_reaction_wait_sec = 0.8
 
     def __init__(self):
+        self.stopped = False
         mixer.init(frequency=22050 * 2)
         self.load_sounds()
 
+    def start(self):
+        self.background_thread = Thread(
+            None, self.run_forever, "atmo-background", daemon=True
+        )
+        self.background_thread.start()
+        self.lines_thread = Thread(
+            None, self.run_lines_forever, "atmo-lines", daemon=True
+        )
+        self.lines_thread.start()
+
+    def stop():
+        self.stopped = True
+        self.lines_thread.join(2)
+        self.background_thread.join(0.5)
+
     def load_sounds(self):
         type_names = glob("samples/*/")
         type_files = {}
@@ -119,7 +136,9 @@ class CampAtmo:
                 i += 1
         self.sounds = {}
         for name, files in type_files.items():
-            self.sounds[name] = SoundCollection(name, files)
+            self.sounds[name] = SoundCollection(
+                name, files, volume=0.1 if name in self.background_track_types else 0.9
+            )
 
     def manage_background_queue(self, name, type_channels):
         for c in type_channels:
@@ -131,7 +150,7 @@ class CampAtmo:
                 c.queue(self.sounds[name].next())
 
     def run_forever(self):
-        while True:
+        while not self.stopped:
             for name, type_channels in self.types.items():
                 if (
                     name not in self.background_track_types
@@ -142,15 +161,35 @@ class CampAtmo:
             time.sleep(1)
             self.load_sounds()
 
+    def play_type_sounds(self, type_name) -> int:
+        if len(self.sounds[type_name]) == 0:
+            return
+        max_sound_length = 0
+        for channel in self.types[type_name]:
+            sound = self.sounds[type_name].next()
+            max_sound_length = max(max_sound_length, sound.get_length())
+            channel.queue(sound)
+        return max_sound_length
+
+    def run_lines_forever(self):
+        while not self.stopped:
+            time.sleep(random.randrange(*self.lines_delta_sec))
+            length_sec = self.play_type_sounds("lines")
+            time.sleep(length_sec + self.line_reaction_wait_sec)
+            self.play_type_sounds("reactions")
+
 
 def main():
     atmo = CampAtmo()
     atmoRepl = AtmoReplRunner(atmo, port=7723)
     atmoRepl.start()
+    atmo.start()
     try:
-        atmo.run_forever()
+        while True:
+            time.sleep(100)
     except KeyboardInterrupt:
-        print("exit")
+        print("exiting...")
+        atmo.stop()
         sys.exit(0)