Move library tree where it belongs

lib-src/libnyquist/nyquist/tran/downproto.alg

@@ -0,0 +1,18 @@
+(DOWNSAMPLE-PROTO-ALG
+  (NAME "down")
+  (ARGUMENTS ("rate_type" "sr") ("sound_type" "s"))
+  (SAMPLE-RATE "sr")
+  (START (MIN s))
+  (INLINE-INTERPOLATION T)
+  (STATE )
+  (INNER-LOOP "output = s")
+  (TERMINATE (MIN s))
+  (LOGICAL-STOP (MIN s))
+  (TYPE-CHECK
+"    if (s->sr < sr) {
+        sound_unref(s);
+        xlfail(\"snd-down: output sample rate must be lower than input\");
+    }
+")
+)
+