Fix undefined behavior in sign conversion. https://github.com/mpruett/audiofile/commit/b62c902dd258125cac86cd2df21fc898035a43d3 Index: libaudiofile/modules/SimpleModule.h --- libaudiofile/modules/SimpleModule.h.orig +++ libaudiofile/modules/SimpleModule.h @@ -123,7 +123,8 @@ struct signConverter typedef typename IntTypes::UnsignedType UnsignedType; static const int kScaleBits = (Format + 1) * CHAR_BIT - 1; - static const int kMinSignedValue = -1 << kScaleBits; + static const int kMaxSignedValue = (((1 << (kScaleBits - 1)) - 1) << 1) + 1; + static const int kMinSignedValue = -kMaxSignedValue - 1; struct signedToUnsigned : public std::unary_function {