fix reversed pan values (#278)

* fix reversed pan values

* update version

* code rev

Author: Raffaello

CMakeLists.txt

@@ -5,7 +5,7 @@ if(DEFINED ENV{VCPKG_ROOT} AND NOT DEFINED CMAKE_TOOLCHAIN_FILE)
 endif()
 
 
-project ("sdl2-hyper-sonic-drivers" VERSION 0.15.1 DESCRIPTION "SDL2 based Hyper-Sonic Drivers for emulating old soundcards")
+project ("sdl2-hyper-sonic-drivers" VERSION 0.15.2 DESCRIPTION "SDL2 based Hyper-Sonic Drivers for emulating old soundcards")
 include (TestBigEndian)
 TEST_BIG_ENDIAN(IS_BIG_ENDIAN)
 if(IS_BIG_ENDIAN)

sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/audio/mixer/Channel.cpp

@@ -118,8 +118,8 @@ namespace HyperSonicDrivers::audio::mixer
         const float pan = (127.5f + m_pan) / 255.0f;
         // TODO: create different selectable pan laws
         // -3dB pan law
-        m_volL = static_cast<uint16_t>(std::round(sqrt(1 - pan) * vol / ch_max_vol));
-        m_volR = static_cast<uint16_t>(std::round(sqrt(pan) * vol / ch_max_vol));
+        m_volL = static_cast<uint16_t>(std::round(sqrt(pan) * vol / ch_max_vol));
+        m_volR = static_cast<uint16_t>(std::round(sqrt(1 - pan) * vol / ch_max_vol));
 
         // adjust for master volume
         const auto m_vol = m_mixer.getMasterVolume();