diff --git a/speaker_driver.lua b/speaker_driver.lua
index 6f27ad9..3214c8c 100644
--- a/speaker_driver.lua
+++ b/speaker_driver.lua
@@ -53,15 +53,17 @@ local function playFullFile(speaker, fileName)
     file.close()
 end
 
-local function playSound(speakers, fileName)
+local function playSound(placeholder,fileName)
+    local speakers = table.pack(peripheral.find("speaker"))
     local tasks = {}
-    for _, speaker in ipairs(speakers) do
-        table.insert(tasks, function()
-            playFullFile(speaker, fileName)
-        end)
+
+    for i = 1, speakers.n do
+        tasks[i] = function()
+            playFullFile(speakers[i], fileName)
+        end
     end
 
-    parallel.waitForAll(table.unpack(tasks))
+    parallel.waitForAll(table.unpack(tasks, 1, speakers.n))
 end