X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fardour%2Fiec2ppmdsp.cc;h=d65f51b3fa0c4085d2a6a77fbf82c5e5ff5e8f56;hb=ced4378d0914bcfb926267772c45d1d23f3bed38;hp=76862cccd2d2bf8a01012c67fae42855f2d196a6;hpb=bd2ddc09ab3091c7a57d814751c88eea0838c553;p=ardour.git

diff --git a/libs/ardour/iec2ppmdsp.cc b/libs/ardour/iec2ppmdsp.cc
index 76862cccd2..d65f51b3fa 100644
--- a/libs/ardour/iec2ppmdsp.cc
+++ b/libs/ardour/iec2ppmdsp.cc
@@ -41,12 +41,12 @@ Iec2ppmdsp::~Iec2ppmdsp (void)
 }
 
 
-void Iec2ppmdsp::process (float *p, int n)
+void Iec2ppmdsp::process (float const *p, int n)
 {
     float z1, z2, m, t;
 
-    z1 = _z1;
-    z2 = _z2;
+    z1 = _z1 > 20 ? 20 : (_z1 < 0 ? 0 : _z1);
+    z2 = _z2 > 20 ? 20 : (_z2 < 0 ? 0 : _z2);
     m = _res ? 0: _m;
     _res = false;