********************************************************************
function: linear scale -> dB, Bark and Mel scales
- last mod: $Id: scales.h,v 1.5 2000/06/14 01:38:32 xiphmont Exp $
+ last mod: $Id: scales.h,v 1.6 2000/10/12 03:12:54 xiphmont Exp $
********************************************************************/
/* 20log10(x) */
#define DYNAMIC_RANGE_dB 200.
-#define todB(x) ((x)==0?-9.e40:log(fabs(x))*8.6858896)
+#define todB(x) ((x)==0?-9.e38:log(fabs(x))*8.6858896)
+#define todB_nn(x) ((x)==0?-9.e38:log(x)*8.6858896)
#define fromdB(x) (exp((x)*.11512925))