added second button and logic to stop events as a test

main.py

-from signal import pause
+import sys
+import os
 from os.path import isfile, join
-
+import pygame
 from gpiozero import Button
+from signal import pause
+
+# import keyboard
+from storage_media import USBDeviceHandler
+
+# import time
+# import signal
+# import keyboard
+pygame.init()
+winW = pygame.display.Info().current_w * 0.2
+winH = pygame.display.Info().current_h * 0.2
+window = pygame.display.set_mode((winW, winH))
+# Fullscreen = True
+# window.fill((205,100,100))
+# pygame.display.update()
+
+clock = pygame.time.Clock()
+
+
+def reset_sounds():
+    global sound_array
+
+    sound_array = []
+    setup_sounds()
+
+
+def setup_sounds():
+    global sound_array
+    global contentlist
+    global sound_dir
+
+    print("inside setup")
+    print(contentlist)
+
+    for content in contentlist:
+        print(join(sound_dir, content))
+        if isfile(join(sound_dir, content)):
+            if (content.endswith(".mp3") or content.endswith(".wav")) and (
+                not content.startswith("._")
+            ):
+                sound = pygame.mixer.Sound(join(sound_dir, content))
+                sound_array.append(sound)
+                print(content)
+    print("sound array")
+    print(sound_array)
+
+
+sound_playing = False
+
+
+def play_sound(index):
+    global sound_playing
+    global cut_current_sound
+    global current_sound_index
+    global channel
+    global sound_array
+    global btn_array
+
+    print("play func called")
+    sound_playing = True
+
+    if not cut_current_sound:
+        current_sound_index = index
+        channel = sound_array[current_sound_index].play()
+
+        while channel.get_busy():
+            pygame.time.wait(100)  # ms
+            print("Playing...")
+            print(btn_array[current_sound_index].is_held)
+            print(btn_array[current_sound_index].is_pressed)
+            pygame.event.clear()
+
+        sound_playing = False
+        btn_array[current_sound_index].when_pressed = lambda: btn_pressed(index)
+        print("Finished. ")
+
+    """ todo
+    make sounds stop when new key pressed
+
+    else:
+        if current_sound_index == index:
+            current_sound_index = index
+            channel = sound_array[current_sound_index].play()
+            while channel.get_busy():
+                pygame.time.wait(100)  # ms
+                print("Playing...pygame.init()")
+            print("Finished.")
+        else:
+            print("STOP.")
 
+    """
+
+
+def setup_paths(val):
+    global contentlist
+    global sound_dir
+    global sound_dir_local
+    global usb_handler
+
+    sound_dir = sound_dir_local
+    usbdisks = usb_handler.get_usb_devices()
+
+    if len(usbdisks) > 0:
+        sound_dir = usbdisks[0].mountpoint
 
+    contentlist = os.listdir(sound_dir)
+    contentlist = sorted(contentlist)
+    reset_sounds()
 
 
+# prepare local paths in case no USB
+sound_dir_local = os.getcwd() + "/sounds"
+sound_dir = ""
 
+# start USB handler with listener
+usb_handler = USBDeviceHandler()
+usb_handler.on("example_event", setup_paths)
 
+# prepare sound variables
+sound_array = []
+cut_current_sound = False
+channel = False
+current_sound_index = -1
+
+# run setup
+setup_paths(False)
 
 
 def btn_pressed(index):
     global btn_array
-    #btn_array[index].when_pressed = None
-    #btn_array[index].when_released = lambda: resetBtn(index)
-    print('keeps pressing')
+    global sound_playing
+    btn_array[index].when_pressed = None
+    # btn_array[index].when_released = lambda: resetBtn(index)
+    print("keeps pressing")
+    if not sound_playing:
+        print("btn pressed")
+        play_sound(index)
 
     """
     def resetBtn(index):
@@ -25,17 +150,75 @@ def btn_pressed(index):
     btn_array[index].when_released = None
     btn_array[index].when_pressed = lambda: btn_pressed(index) """
 
+
 btn1 = Button(21)
-btn1.when_pressed = lambda: btn_pressed(0)
-#btn1.when_held = None
-btn1.when_released = lambda: print('was relasedasd')
+#btn1.when_pressed = lambda: btn_pressed(0)
+# btn1.when_held = None
+# btn1.when_released = lambda: resetBtn(0)
 
 btn2 = Button(13)
-btn2.when_pressed = lambda: btn_pressed(1)
-#btn2.when_held = None
-#btn2.when_released = lambda: resetBtn(1)
+#btn2.when_pressed = lambda: btn_pressed(1)
+# btn2.when_held = None
+# btn2.when_released = lambda: resetBtn(1)
 
 btn_array = [btn1, btn2]
 
-pause()
 
+# pause()
+run = True
+while run:
+    clock.tick(25)
+
+    if btn1.is_pressed:
+        play_sound(0)
+    elif btn2.is_pressed:
+        play_sound(1)
+
+    for event in pygame.event.get():
+
+        if event.type == pygame.QUIT:
+            run = False
+
+        # keyboard module
+        """
+        if keyboard.is_pressed("q"):
+            print("You Pressed A Key!")
+            play_sound(0)
+        elif keyboard.is_pressed("w"):
+            print("You Pressed A Key!")
+            play_sound(1)
+        elif keyboard.is_pressed("e"):
+            print("You Pressed A Key!")
+            play_sound(2)
+        elif keyboard.is_pressed("r"):
+            print("You Pressed A Key!")
+            play_sound(3)
+        """
+
+        if event.type == pygame.KEYDOWN:
+            print("you pressed " + pygame.key.name(event.key))
+            if event.key == pygame.K_q:
+                play_sound(0)
+            elif event.key == pygame.K_w:
+                play_sound(1)
+            elif event.key == pygame.K_e:
+                play_sound(2)
+            elif event.key == pygame.K_r:
+                play_sound(3)
+
+                """
+            elif event.key == pygame.K_f:
+                if Fullscreen:
+                    window = pygame.display.set_mode((winW,winH))
+                    Fullscreen = False
+                else:
+                    window = pygame.display.set_mode((0,0), pygame.FULLSCREEN)
+                    Fullscreen = True
+                    """
+
+
+pygame.quit()
+sys.exit()
+exit()
+# time.sleep(5.5)
+# signal.pause()