diff --git a/components/spotify/cspot/bell/external/nanopb/extra/FindNanopb.cmake b/components/spotify/cspot/bell/external/nanopb/extra/FindNanopb.cmake
index 84016b31..d8373926 100644
--- a/components/spotify/cspot/bell/external/nanopb/extra/FindNanopb.cmake
+++ b/components/spotify/cspot/bell/external/nanopb/extra/FindNanopb.cmake
@@ -125,7 +125,7 @@ function(NANOPB_GENERATE_CPP SRCS HDRS)
   endif()
   
   if(MSVC)
-    set(CALL_PREFIX call)
+    set(CUSTOM_COMMAND_PREFIX call)
   endif()
 
   if(NANOPB_GENERATE_CPP_APPEND_PATH)
@@ -187,7 +187,7 @@ function(NANOPB_GENERATE_CPP SRCS HDRS)
       set(GENERATOR_CORE_PYTHON_SRC ${GENERATOR_CORE_PYTHON_SRC} ${output})
       add_custom_command(
         OUTPUT ${output}
-        COMMAND ${CALL_PREFIX} ${PROTOBUF_PROTOC_EXECUTABLE}
+        COMMAND ${CUSTOM_COMMAND_PREFIX} ${PROTOBUF_PROTOC_EXECUTABLE}
         ARGS -I${GENERATOR_PATH}/proto
           --python_out=${GENERATOR_CORE_DIR} ${ABS_FIL}
         DEPENDS ${ABS_FIL}
@@ -279,7 +279,7 @@ function(NANOPB_GENERATE_CPP SRCS HDRS)
     add_custom_command(
       OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/${FIL_PATH_REL}/${FIL_WE}.pb.c"
              "${CMAKE_CURRENT_BINARY_DIR}/${FIL_PATH_REL}/${FIL_WE}.pb.h"
-      COMMAND ${CALL_PREFIX} ${PROTOBUF_PROTOC_EXECUTABLE}
+      COMMAND ${CUSTOM_COMMAND_PREFIX} ${PROTOBUF_PROTOC_EXECUTABLE}
       ARGS -I${GENERATOR_PATH} -I${GENERATOR_CORE_DIR}
            -I${CMAKE_CURRENT_BINARY_DIR} ${_nanopb_include_path}
            --plugin=protoc-gen-nanopb=${NANOPB_GENERATOR_PLUGIN}
@@ -297,7 +297,7 @@ function(NANOPB_GENERATE_CPP SRCS HDRS)
   set(${HDRS} ${${HDRS}} ${NANOPB_HDRS} PARENT_SCOPE)
   
   if(MSVC)
-      unset(CALL_PREFIX)
+      unset(CUSTOM_COMMAND_PREFIX)
   endif()    
 
 endfunction()
diff --git a/components/squeezelite/decode_external.c b/components/squeezelite/decode_external.c
index 71536347..d7437526 100644
--- a/components/squeezelite/decode_external.c
+++ b/components/squeezelite/decode_external.c
@@ -406,7 +406,7 @@ static bool cspot_cmd_handler(cspot_event_t cmd, va_list args)
 	case CSPOT_VOLUME: {
 		u32_t volume = va_arg(args, u32_t);
 		LOG_INFO("CSpot volume %u", volume);
-		volume = 65536 * powf(volume / 65536.0f, 2);
+		volume = 65536 * powf(volume / 65536.0f, 4);
 		set_volume(volume, volume);
 		break;
 	default: