diff --git a/src/AnalysisConfigFiles/Towsey.Acoustic.Zooming.yml b/src/AnalysisConfigFiles/Towsey.Acoustic.Zooming.yml
index 5e787d663..9e92748ee 100644
--- a/src/AnalysisConfigFiles/Towsey.Acoustic.Zooming.yml
+++ b/src/AnalysisConfigFiles/Towsey.Acoustic.Zooming.yml
@@ -8,7 +8,7 @@
 #
 #
 
-AnalysisName: Towsey.Acoustic
+#AnalysisName: Towsey.Acoustic
 #SegmentDuration: units=seconds;
 SegmentDuration: 60
 #SegmentOverlap: units=seconds;
@@ -64,11 +64,11 @@ TileOutput: false
 # if true, an exception will be thrown if no such date is found
 # if false, and a valid date is still found in file name, it will still be parsed
 # supports formats like:
-#     prefix_20140101T235959+1000.mp3
-#     prefix_20140101T235959+Z.mp3
-#     prefix_20140101-235959+1000.mp3
-#     prefix_20140101-235959+Z.mp3
-RequireDateInFilename: false
+#     prefix_20140101T235959+1000.wav
+#     prefix_20140101T235959Z.wav
+#     prefix_20140101-235959+1000.wav
+#     prefix_20140101_235959Z.wav
+RequireDateInFilename: true
 
 IndexPropertiesConfig: './IndexPropertiesConfig.Zooming.yml'
 EventThreshold: 0.2
diff --git a/src/AnalysisPrograms/Sandpit.cs b/src/AnalysisPrograms/Sandpit.cs
index 2701ec9eb..5b6e795cc 100644
--- a/src/AnalysisPrograms/Sandpit.cs
+++ b/src/AnalysisPrograms/Sandpit.cs
@@ -334,9 +334,9 @@ public static void Audio2CsvOverOneFile()
             //string outputPath = @"G:\SensorNetworks\Output\BradLaw\Pillaga24";
             //string configPath = @"C:\Work\GitHub\audio-analysis\AudioAnalysis\AnalysisConfigFiles\Towsey.Acoustic.yml";
 
-            string recordingPath = @"C:\Ecoacoustics\WavFiles\LizZnidersic\TasmanIsland2015_Unit2_Mez\SM304256_0+1_20151114_211652.wav";
+            string recordingPath = @"C:\Ecoacoustics\WavFiles\LizZnidersic\TasmanIsland2015_Unit2_Mez\SM304256_0+1_20151114_191652+1000.wav";
             //string outputPath = @"C:\Ecoacoustics\Output\Test\Test24HourRecording\TasmanIslandMez\22";
-            string outputPath = @"C:\Ecoacoustics\Output\Test\TestMezOneHourHiRes\22";
+            string outputPath = @"C:\Ecoacoustics\Output\Test\TestMezOneHourHiRes\20";
             //string configPath = @"C:\Work\GitHub\audio-analysis\src\AnalysisConfigFiles\Towsey.Acoustic.yml";
             string configPath = @"C:\Work\GitHub\audio-analysis\src\AnalysisConfigFiles\Towsey.Acoustic.Zooming.yml";
 
@@ -688,7 +688,7 @@ public static void DrawZoomingSpectrogramPyramid()
             //string ipdir = @"C:\Ecoacoustics\Output\FalseColourSpectrograms\SpectrogramFocalZoom\Towsey.Acoustic.200ms.EclipseFarmstayOLD";
             //MAP "\\Sef-bigdata-10\d$\tasmania_mez\output_zooming_indices2019\Towsey.Acoustic" to Q drive
             //string ipdir = @"Q:\TasmaniaMez";
-            string ipdir = @"C:\Ecoacoustics\Output\Test\TestMezOneHourHiRes\22\Towsey.Acoustic";
+            string ipdir = @"C:\Ecoacoustics\Output\Test\TestMezOneHourHiRes\20\Towsey.Acoustic";
             string opdir = @"C:\Ecoacoustics\Output\FalseColourSpectrograms\SpectrogramFocalZoom\TasmaniaMezTest";
 
             // The default zooming LDFC spectrogram config file
diff --git a/src/AudioAnalysisTools/LongDurationSpectrograms/Zooming/ZoomCommon.cs b/src/AudioAnalysisTools/LongDurationSpectrograms/Zooming/ZoomCommon.cs
index 8bf194749..1000dd136 100644
--- a/src/AudioAnalysisTools/LongDurationSpectrograms/Zooming/ZoomCommon.cs
+++ b/src/AudioAnalysisTools/LongDurationSpectrograms/Zooming/ZoomCommon.cs
@@ -42,7 +42,7 @@ public static (Dictionary<string, double[,]>, Dictionary<string, IndexProperties
 
             // Make a BNG COMBINATION Spectral matrix.
             //var comboMatrix = MatrixTools.MaxOfTwoMatrices(spectra["BNG"], spectra["RHZ"]);
-            var comboMatrix = MatrixTools.AddMatricesWeightedSum(spectra["BGN"], 1.0, spectra[comboIndexID], 20.0);
+            var comboMatrix = MatrixTools.AddMatricesWeightedSum(spectra["BGN"], 1.0, spectra[comboIndexID], 10.0);
             spectra["BGN"] = comboMatrix;
 
             return (spectra, relevantIndexProperties);