diff --git a/Makefile.am b/Makefile.am
index 82bca23..f4bfeec 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -22,6 +22,7 @@ AM_LDFLAGS  =
 # debug/release switches
 if DEBUG
   AM_CFLAGS   += -g
+  #  -Wextra -Werror -Wconversion -fsanitize=address
   AM_CXXFLAGS += -g -Wall  -fsanitize=undefined
 else
   AM_CFLAGS   += -O3
diff --git a/src/cwtest/cfg/main.cfg b/src/cwtest/cfg/main.cfg
index b6b99d2..29cff7c 100644
--- a/src/cwtest/cfg/main.cfg
+++ b/src/cwtest/cfg/main.cfg
@@ -29,6 +29,13 @@
     spscBuf: {},
     spscQueueTmpl: {},
     
+    nbmpscQueue: {
+      blkN: 4,
+      blkByteN: 1024,
+      testDurMs: 2000,
+      threadN: 2
+    }
+    
     websockSrv: {
       physRootDir: "~/src/cwtest/src/libcw/html/websockSrvTest",
       dfltHtmlPageFn: "test_websocket.html",
@@ -40,7 +47,7 @@
     midiDevice: {
         appNameStr: "test_app",
         fileDevName: "file_dev",
-	fileDevReadAheadMicros: 1000,
+	fileDevReadAheadMicros: 3000,
         parseBufByteCnt: 1024,
 	testFileLabel: "file_0",
 	testFileEnableFl: true,
@@ -57,7 +64,28 @@
 	]	
      },
 
-
+     /*
+    midiSource: {
+     fname: "~/temp/test.mid",
+     src: {
+       ticks_per_quarter: 480,
+       noteL: [
+         { tempo : 120 },
+	 { bar: 1 }
+         { meter: [ 4, 4 ] },
+	 { voiceL: [ [
+           { b : [ Cs3, mf ] },      // 1st beat : qtr note
+           { b : [ [E1 B3] , p ] },  // 2nd beat : two 8ths at p
+	   { b : [ [E2 [A1 B2]] , mf ] }, // 3rd beat : 8th and two 16ths
+	   { b : [ [E3 [A1 [B2 p]]] , mf ] }, // 4th beat : 8th and two 16ths w/ dyn
+	   { b : [ [E4 [R r.]]
+	 ]]
+	 { bar: 2 } 
+         ]
+       }
+     },
+     */
+     
     midiFileDev: {
 	         fname: "/home/kevin/src/cwtest/src/cwtest/cfg/gutim_full/data1/beck2/record_5/midi.mid"
      },
@@ -927,6 +955,11 @@
     }
     
 
+    gutim_reg: {
+      dir: "~/temp/cw_reg/reg.csv"
+      
+    },
+
     audio_transforms: {},
 
     // Convert the the 'am' files in 'inDir'  to MIDI and CSV files
@@ -935,10 +968,16 @@
     // All output files are written in the same directory as the 'am' files.
     am_to_midi_file: [
     
-     { enable_fl: true, player_name: "beck", prefix_label:"beck_1", sess_numb:1, beg_loc: 4232, end_loc: 4707, dir: "~/src/cwtest/src/cwtest/cfg/gutim_full/data/beck1" },
-     { enable_fl: true, player_name: "beck", prefix_label:"beck_2", sess_numb:2, beg_loc: 4232, end_loc: 4707, dir: "~/src/cwtest/src/cwtest/cfg/gutim_full/data/beck2" },
-     { enable_fl: true, player_name: "taka", prefix_label:"taka_1", sess_numb:1, beg_loc: 4232, end_loc: 4707, dir: "~/src/cwtest/src/cwtest/cfg/gutim_full/data/taka1" },
-     { enable_fl: true, player_name: "taka", prefix_label:"taka_2", sess_numb:2, beg_loc: 4232, end_loc: 4707, dir: "~/src/cwtest/src/cwtest/cfg/gutim_full/data/taka2" } 
+     { enable_fl: false, player_name: "beck", prefix_label:"beck_1", sess_numb:1, beg_loc: 4232, end_loc: 4707, dir: "~/src/cwtest/src/cwtest/cfg/gutim_full/data/beck1" },
+     { enable_fl: false, player_name: "beck", prefix_label:"beck_2", sess_numb:2, beg_loc: 4232, end_loc: 4707, dir: "~/src/cwtest/src/cwtest/cfg/gutim_full/data/beck2" },
+     { enable_fl: false, player_name: "taka", prefix_label:"taka_1", sess_numb:1, beg_loc: 4232, end_loc: 4707, dir: "~/src/cwtest/src/cwtest/cfg/gutim_full/data/taka1" },
+     { enable_fl: false, player_name: "taka", prefix_label:"taka_2", sess_numb:2, beg_loc: 4232, end_loc: 4707, dir: "~/src/cwtest/src/cwtest/cfg/gutim_full/data/taka2" }, 
+     { enable_fl: false,  player_name: "ding", prefix_label:"ding_1", sess_numb:1, beg_loc:  120, end_loc:  146, dir: "~/temp/shiau_uen/segment_0" },
+     { enable_fl: false,  player_name: "ding", prefix_label:"ding_1", sess_numb:1, beg_loc:  888, end_loc:  929, dir: "~/temp/shiau_uen/segment_1" }, 
+     { enable_fl: false,  player_name: "ding", prefix_label:"ding_1", sess_numb:1, beg_loc: 2287, end_loc: 2454, dir: "~/temp/shiau_uen/segment_2" },
+     { enable_fl: false,  player_name: "ding", prefix_label:"ding_1", sess_numb:1, beg_loc: 3765, end_loc: 3883, dir: "~/temp/shiau_uen/segment_3" },
+     { enable_fl: false,  player_name: "ding", prefix_label:"ding_1", sess_numb:1, beg_loc: 5407, end_loc: 5462, dir: "~/temp/shiau_uen/segment_4" },
+     { enable_fl: true,  player_name: "ding", prefix_label:"ding_1", sess_numb:1, beg_loc: 6608, end_loc: 6677, dir: "~/temp/shiau_uen/segment_5" } 
       ],   
 
     audio_file_proc: {
diff --git a/src/cwtest/main.cpp b/src/cwtest/main.cpp
index c89cd45..20a0214 100644
--- a/src/cwtest/main.cpp
+++ b/src/cwtest/main.cpp
@@ -17,6 +17,7 @@
 #include "cwKeyboard.h"
 #include "cwSpScBuf.h"
 #include "cwSpScQueueTmpl.h"
+#include "cwNbMpScQueue.h"
 #include "cwThreadMach.h"
 #include "cwSerialPort.h"
 #include "cwSerialPortSrv.h"
@@ -40,6 +41,7 @@
 #include "cwPerfMeas.h"
 
 #include "cwPianoScore.h"
+#include "cwGutimReg.h"
 #include "cwIoPresetSelApp.h"
 
 
@@ -415,6 +417,7 @@ cw::rc_t kbTest2Test(          const cw::object_t* cfg, const cw::object_t* args
 cw::rc_t kbTest3Test(          const cw::object_t* cfg, const cw::object_t* args, int argc, const char* argv[] ) { cw::kbTest3(); return cw::kOkRC; }
 cw::rc_t spscBuf(              const cw::object_t* cfg, const cw::object_t* args, int argc, const char* argv[] ) { return cw::spsc_buf::test(); }
 cw::rc_t spscQueueTmpl(        const cw::object_t* cfg, const cw::object_t* args, int argc, const char* argv[] ) { return cw::testSpScQueueTmpl(); }
+cw::rc_t nbMpScQueue(          const cw::object_t* cfg, const cw::object_t* args, int argc, const char* argv[] ) { return cw::nbmpscq::test(args); }
 cw::rc_t serialPortSrvTest(    const cw::object_t* cfg, const cw::object_t* args, int argc, const char* argv[] ) { return cw::serialPortSrvTest(); }
 cw::rc_t textBufTest(          const cw::object_t* cfg, const cw::object_t* args, int argc, const char* argv[] ) { return cw::textBuf::test(); }
 cw::rc_t audioBufTest(         const cw::object_t* cfg, const cw::object_t* args, int argc, const char* argv[] ) { return cw::audio::buf::test(); }
@@ -435,6 +438,7 @@ cw::rc_t fftTest(              const cw::object_t* cfg, const cw::object_t* args
 cw::rc_t ifftTest(             const cw::object_t* cfg, const cw::object_t* args, int argc, const char* argv[] ) { return cw::dsp::ifft::test(); }
 cw::rc_t convolveTest(         const cw::object_t* cfg, const cw::object_t* args, int argc, const char* argv[] ) { return cw::dsp::convolve::test(); }
 cw::rc_t pianoScoreTest(       const cw::object_t* cfg, const cw::object_t* args, int argc, const char* argv[] ) { return cw::perf_score::test(args); }
+cw::rc_t gutimRegTest(         const cw::object_t* cfg, const cw::object_t* args, int argc, const char* argv[] ) { return cw::gutim::reg::test(args); }
 cw::rc_t audioTransformsTest(  const cw::object_t* cfg, const cw::object_t* args, int argc, const char* argv[] ) { return cw::dsp::test(args); }
 cw::rc_t amToMidiFile(         const cw::object_t* cfg, const cw::object_t* args, int argc, const char* argv[] ) { return cw::midi_record_play::am_to_midi_file(args); }
 cw::rc_t audioFileProc(        const cw::object_t* cfg, const cw::object_t* args, int argc, const char* argv[] ) { return cw::afop::file_processor(args); }
@@ -786,6 +790,7 @@ int main( int argc, const char* argv[] )
    { "kbTest3", kbTest3Test },
    { "spscBuf", spscBuf },
    { "spscQueueTmpl", spscQueueTmpl },
+   { "nbmpscQueue", nbMpScQueue },
    { "websockSrv", websockSrvTest },
    { "serialSrv", serialPortSrvTest },
    { "midiDeviceReport", midiDeviceReport },
@@ -834,6 +839,7 @@ int main( int argc, const char* argv[] )
    { "ifft", ifftTest },
    { "convolve", convolveTest },
    { "piano_score", pianoScoreTest },
+   { "gutim_reg", gutimRegTest },
    { "audio_transforms", audioTransformsTest },
    { "am_to_midi_file", amToMidiFile },
    { "audio_file_proc", audioFileProc },