# HG changeset patch
# User Chris Cannam
# Date 1615553305 0
#      Fri Mar 12 12:48:25 2021 +0000
# Node ID 1f9833bdd0a7f20f6212563a8f97e757152b430e
# Parent  e8d739f7e80d5bd619dbfcaa982d21a593aa2796
Clarify this

diff --git a/src/FFT.cpp b/src/FFT.cpp
--- a/src/FFT.cpp
+++ b/src/FFT.cpp
@@ -1932,7 +1932,8 @@
                           double *BQ_R__ ro, double *BQ_R__ io,
                           bool inverse) {
 
-        // Following the method of Don Cross's 1996 Pascal implementation
+        // Following Don Cross's 1998 implementation, described by its
+        // author as public domain.
         
         if (!ri || !ro || !io) return;