From 822190cd6836d85b9a3cfad4e27031f6a20ac43e Mon Sep 17 00:00:00 2001
From: Paul Brossier <piem@piem.org>
Date: Sat, 28 Dec 2013 19:39:05 -0400
Subject: [PATCH] examples/aubioonset.c: synth only when need be

---
 examples/aubioonset.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/examples/aubioonset.c b/examples/aubioonset.c
index 0a3094cf..814dea9c 100644
--- a/examples/aubioonset.c
+++ b/examples/aubioonset.c
@@ -31,9 +31,10 @@ smpl_t is_onset;
 
 void
 process_block(fvec_t *ibuf, fvec_t *obuf) {
-  fvec_zeros(obuf);
   aubio_onset_do (o, ibuf, onset);
   is_onset = fvec_get_sample(onset, 0);
+  if ( !usejack && ! sink_uri ) return;
+  fvec_zeros(obuf);
   if ( is_onset ) {
     aubio_wavetable_play ( wavetable );
   } else {
-- 
2.11.0