1 files changed, 2 insertions, 1 deletions
diff --git a/conv.awk b/conv.awk
index 2248927..b7e48eb 100644
--- a/conv.awk
+++ b/conv.awk
@@ -4,7 +4,8 @@
 # [PoC] linear convolution (with hardcoded IR window).
 
 BEGIN {
-    X = ARGV[1]
+    ARGV[1] ? X = ARGV[1] : X = 0
+    ARGV[2] ? OFMT = "%." ARGV[2] "g" : OFMT = "%g"
     input_size = split(X, X_arr)
     #H = "1.0 1.0 1.0"      # rect
     #H = "0.25 0.50 0.25"   # von Hann