--- dsp.c	2009-02-18 15:55:47.026741200 -0500
+++ dsp2.c	2009-02-18 15:24:04.551093200 -0500
@@ -1177,6 +1177,9 @@
         if(dsp->tdspeed_active)
             samples = tdspeed_doit(tmp, samples);
 
+        if (samples <= 0)
+            break; 
+
         if (dsp->apply_gain)
             dsp->apply_gain(samples, &dsp->data, tmp);