diff --git a/packages/win_installer/fragment_associations.iss b/packages/win_installer/fragment_associations.iss
index 7e19a3340..04529dadf 100644
--- a/packages/win_installer/fragment_associations.iss
+++ b/packages/win_installer/fragment_associations.iss
@@ -67,6 +67,8 @@ Root: HKLM; Subkey: "SOFTWARE\Classes\Applications\aegisub{#ARCH}.exe\SupportedT
 Root: HKLM; Subkey: "SOFTWARE\Classes\Applications\aegisub{#ARCH}.exe\SupportedTypes"; ValueType: string; ValueName: ".opus"; ValueData: ""; Flags: uninsdeletekey
 Root: HKLM; Subkey: "SOFTWARE\Classes\Applications\aegisub{#ARCH}.exe\SupportedTypes"; ValueType: string; ValueName: ".h264"; ValueData: ""; Flags: uninsdeletekey
 Root: HKLM; Subkey: "SOFTWARE\Classes\Applications\aegisub{#ARCH}.exe\SupportedTypes"; ValueType: string; ValueName: ".hevc"; ValueData: ""; Flags: uninsdeletekey
+Root: HKLM; Subkey: "SOFTWARE\Classes\Applications\aegisub{#ARCH}.exe\SupportedTypes"; ValueType: string; ValueName: ".eac3"; ValueData: ""; Flags: uninsdeletekey
+Root: HKLM; Subkey: "SOFTWARE\Classes\Applications\aegisub{#ARCH}.exe\SupportedTypes"; ValueType: string; ValueName: ".webm"; ValueData: ""; Flags: uninsdeletekey
 ; Class for general subtitle formats
 Root: HKLM; Subkey: "SOFTWARE\Classes\Aegisub.Subtitle.1"; ValueType: string; ValueName: ""; ValueData: "Aegisub subtitle file"; Flags: uninsdeletekey
 Root: HKLM; Subkey: "SOFTWARE\Classes\Aegisub.Subtitle.1"; ValueType: dword; ValueName: "EditFlags"; ValueData: $af0; Flags: uninsdeletekey
@@ -201,3 +203,5 @@ Root: HKLM; Subkey: "SOFTWARE\Classes\.avs\OpenWithProgids"; ValueType: string;
 Root: HKLM; Subkey: "SOFTWARE\Classes\.opus\OpenWithProgids"; ValueType: string; ValueName: "Aegisub.Audio.1"; Flags: uninsdeletevalue
 Root: HKLM; Subkey: "SOFTWARE\Classes\.h264\OpenWithProgids"; ValueType: string; ValueName: "Aegisub.Video.1"; Flags: uninsdeletevalue
 Root: HKLM; Subkey: "SOFTWARE\Classes\.hevc\OpenWithProgids"; ValueType: string; ValueName: "Aegisub.Video.1"; Flags: uninsdeletevalue
+Root: HKLM; Subkey: "SOFTWARE\Classes\.eac3\OpenWithProgids"; ValueType: string; ValueName: "Aegisub.Audio.1"; Flags: uninsdeletevalue
+Root: HKLM; Subkey: "SOFTWARE\Classes\.webm\OpenWithProgids"; ValueType: string; ValueName: "Aegisub.Media.1"; Flags: uninsdeletevalue
diff --git a/src/command/audio.cpp b/src/command/audio.cpp
index de25d6454..386866775 100644
--- a/src/command/audio.cpp
+++ b/src/command/audio.cpp
@@ -80,7 +80,7 @@ struct audio_open final : public Command {
 	STR_HELP("Open an audio file")
 
 	void operator()(agi::Context *c) override {
-		auto str = from_wx(_("Audio Formats") + " (*.aac,*.ac3,*.ape,*.dts,*.flac,*.m4a,*.mka,*.mp3,*.mp4,*.ogg,*.opus,*.w64,*.wav,*.wma)|*.aac;*.ac3;*.ape;*.dts;*.flac;*.m4a;*.mka;*.mp3;*.mp4;*.ogg;*.opus;*.w64;*.wav;*.wma|"
+		auto str = from_wx(_("Audio Formats") + " (*.aac,*.ac3,*.ape,*.dts,*.eac3,*.flac,*.m4a,*.mka,*.mp3,*.mp4,*.ogg,*.opus,*.w64,*.wav,*.wma)|*.aac;*.ac3;*.ape;*.dts;*.eac3;*.flac;*.m4a;*.mka;*.mp3;*.mp4;*.ogg;*.opus;*.w64;*.wav;*.wma|"
 					+ _("Video Formats") + " (*.asf,*.avi,*.avs,*.d2v,*.m2ts,*.m4v,*.mkv,*.mov,*.mp4,*.mpeg,*.mpg,*.ogm,*.webm,*.wmv,*.ts)|*.asf;*.avi;*.avs;*.d2v;*.m2ts;*.m4v;*.mkv;*.mov;*.mp4;*.mpeg;*.mpg;*.ogm;*.webm;*.wmv;*.ts|"
 					+ _("All Files") + " (*.*)|*.*");
 		auto filename = OpenFileSelector(_("Open Audio File"), "Path/Last/Audio", "", "", str, c->parent);
diff --git a/src/project.cpp b/src/project.cpp
index e2b78c319..7a752eae4 100644
--- a/src/project.cpp
+++ b/src/project.cpp
@@ -446,6 +446,7 @@ void Project::LoadList(std::vector<agi::fs::path> const& files) {
 		".ac3",
 		".ape",
 		".dts",
+		".eac3",
 		".flac",
 		".m4a",
 		".mka",