make GPIO selection compatible with directly via I2S connected DACs

disable GPIOs which functions are covered by rotary encoders

misc/sampleconfigs/gpio-buttons.py.sample

@@ -3,9 +3,6 @@ from gpiozero import Button
 from signal import pause
 from subprocess import check_call
 
-# 2018-10-31
-# Added the function on holding volume + - buttons to change the volume in 0.3s interval
-#
 # 2018-10-15
 # this script has the `pull_up=True` for all pins. See the following link for additional info: 
 # https://github.com/MiczFlor/RPi-Jukebox-RFID/issues/259#issuecomment-430007446
@@ -38,23 +35,19 @@ def def_halt():
     check_call("./scripts/playout_controls.sh -c=playerpause", shell=True)
 
 shut = Button(3, hold_time=2)
-vol0 = Button(13,pull_up=True)
-volU = Button(16,pull_up=True,hold_time=0.3,hold_repeat=True)
-volD = Button(19,pull_up=True,hold_time=0.3,hold_repeat=True)
-next = Button(26,pull_up=True)
-prev = Button(20,pull_up=True)
-halt = Button(21,pull_up=True)
+#vol0 = Button(13,pull_up=True)
+#volU = Button(16,pull_up=True)
+#volD = Button(19,pull_up=True)
+#next = Button(26,pull_up=True)
+#prev = Button(20,pull_up=True)
+halt = Button(24,pull_up=True)
 
 shut.when_held = def_shutdown
-vol0.when_pressed = def_vol0
-volU.when_pressed = def_volU
-#When the Volume Up button was held for more than 0.3 seconds every 0.3 seconds he will call a ra$
-volU.when_held = def_volU
-volD.when_pressed = def_volD
-#When the Volume Down button was held for more than 0.3 seconds every 0.3 seconds he will lower t$
-volD.when_held = def_volD
-next.when_pressed = def_next
-prev.when_pressed = def_prev
+#vol0.when_pressed = def_vol0
+#volU.when_pressed = def_volU
+#volD.when_pressed = def_volD
+#next.when_pressed = def_next
+#prev.when_pressed = def_prev
 halt.when_pressed = def_halt
 
 pause()