diff --git a/source/audio.cpp b/source/audio.cpp
index 120713f..5855553 100644
--- a/source/audio.cpp
+++ b/source/audio.cpp
@@ -91,6 +91,7 @@ int RandData[BUFSIZEN];
 int CntSwp=0;
 int PcmWrPos=0;
 
+/*
 const long TblChVol[16]=  				// n/15 n=0~15
 {
    -10000,-2352,-1750,-1398,-1148,-954,-796,-662,
@@ -101,6 +102,7 @@ const long TblMainVol[4]=  				// 1,1/2,1/4,1/8
 {
    0,-602,-1204,-1806
 };
+*/
 
 ////////////////////////////////////////////////////////////////////////////////
 // seal audio specific