aplay: add page (#4591)

pages/linux/aplay.md

@@ -0,0 +1,16 @@
+# aplay
+
+> Command-line sound player for ALSA soundcard driver.
+> More information: <https://linux.die.net/man/1/aplay>.
+
+- Play a specific file (sampling rate, bit depth, etc. will be automatically determined for the file format):
+
+`aplay {{path/to/file}}`
+
+- Play the first 10 seconds of a specific file at 2500Hz:
+
+`aplay --duration={{10}} --rate={{2500}} {{path/to/file}}`
+
+- Play the raw file as a 22050Hz, mono, 8-bit, Mu-Law `.au` file:
+
+`aplay --channels={{1}} --file-type {{raw}} --rate={{22050}} --format={{mu_law}} {{path/to/file}}`