https://bugs.gentoo.org/968832
https://qt-project.atlassian.net/browse/QTBUG-142166
https://codereview.qt-project.org/c/qt/qtmultimedia/+/693529
--- a/src/multimedia/audio/qaudio.h
+++ b/src/multimedia/audio/qaudio.h
@@ -77,5 +77,5 @@
 namespace QAudio
 {
-#if QT_CORE_REMOVED_SINCE(6, 10)
+#if QT_MULTIMEDIA_REMOVED_SINCE(6, 10)
 Q_MULTIMEDIA_EXPORT float convertVolume(float volume, VolumeScale from, VolumeScale to);
 #elif !defined(QT_MULTIMEDIA_BUILD_REMOVED_API)