diff -rupN Add64-1.2.2.org/jackprocessor.cpp Add64-1.2.2/jackprocessor.cpp
--- Add64-1.2.2.org/jackprocessor.cpp	2011-08-07 07:35:20.000000000 -0400
+++ Add64-1.2.2/jackprocessor.cpp	2017-02-16 23:31:14.464518833 -0500
@@ -222,7 +222,7 @@ int JackProcessor::jack_callback(jack_nf
   }
   for (i1 = 0; i1 < 2; i1++) {
     p[i1] = (jack_default_audio_sample_t *)(jack_port_get_buffer (jackOut[i1], nframes));
-    for (i2 = 0; i2 < abs(nframes); i2++) {
+    for (i2 = 0; i2 < nframes; i2++) {
       p[i1][i2] = 1e-9 * model->buf[i1][i2];
     }
   }