Audio overlap loop: Difference between revisions

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 =={{header|Julia}}==
 Uses Julia's ability to run iterations of a 4 loop in separate threads to play a file 4 times, with each play 0.1 seconds out of sync with the previous play. Requires 4 available threads on the CPU at Julia startup.
-<lang julia>soundfile = "loop.wav"
+<lang julia>const soundfile = "loop.wav"
+if length(ARGS) < 1
-@Threads.threads for secs in 0.0:0.1:0.3
+    println("Usage: give number of repetitions in echo effect as argument to the program.")
-    begin sleep(secs); run(`play "$soundfile"`); end
+else
+    ((repetitions = tryparse(Int, ARGS[1])) != nothing) || (repetitions = 3)
+    (repetitions < 1) && (repetitions = 3)
+    (repetitions > Threads.nthreads()) && (repetitions = Threads.nthreads())
+    @Threads.threads for secs in 0.0:0.1:((repetitions - 1) * 0.1)
+        begin sleep(secs); run(`play "$soundfile"`); end
+    end
 end
 </lang>