diff --git a/include/STTypes.h b/include/STTypes.h
index 03dea9e..26e9af7 100644
--- a/include/STTypes.h
+++ b/include/STTypes.h
@@ -56,8 +56,9 @@ typedef unsigned long   ulong;
 
 namespace soundtouch
 {
-    /// Max allowed number of channels
-    #define SOUNDTOUCH_MAX_CHANNELS     16
+    /// Max allowed number of channels. This is not a hard limit but to have some
+    /// maximum value for argument sanity checks -- can be increased if necessary
+    #define SOUNDTOUCH_MAX_CHANNELS     32
 
     /// Activate these undef's to overrule the possible sampletype
     /// setting inherited from some other header file:
diff --git a/source/SoundTouch/FIRFilter.cpp b/source/SoundTouch/FIRFilter.cpp
index 4cd330e..20f9311 100644
--- a/source/SoundTouch/FIRFilter.cpp
+++ b/source/SoundTouch/FIRFilter.cpp
@@ -155,7 +155,7 @@ uint FIRFilter::evaluateFilterMulti(SAMPLETYPE *dest, const SAMPLETYPE *src, uin
     assert(src != nullptr);
     assert(dest != nullptr);
     assert(filterCoeffs != nullptr);
-    assert(numChannels < 16);
+    assert(numChannels <= SOUNDTOUCH_MAX_CHANNELS);
 
     // hint compiler autovectorization that loop length is divisible by 8
     int ilength = length & -8;