diff --git a/server/ctrlsubsonic/ctrl.go b/server/ctrlsubsonic/ctrl.go
index 1b544cf..340e0a8 100644
--- a/server/ctrlsubsonic/ctrl.go
+++ b/server/ctrlsubsonic/ctrl.go
@@ -30,6 +30,7 @@ type Controller struct {
 	CachePath      string
 	CoverCachePath string
 	PodcastsPath   string
+	MusicPaths     []string
 	Jukebox        *jukebox.Jukebox
 	Scrobblers     []scrobble.Scrobbler
 	Podcasts       *podcasts.Podcasts
@@ -116,3 +117,14 @@ func (c *Controller) HR(h handlerSubsonicRaw) http.Handler {
 		}
 	})
 }
+
+func (c *Controller) getMusicFolder(p params.Params) string {
+	idx, err := p.GetInt("musicFolderId")
+	if err != nil {
+		return ""
+	}
+	if idx < 0 || idx > len(c.MusicPaths) {
+		return ""
+	}
+	return c.MusicPaths[idx]
+}
diff --git a/server/ctrlsubsonic/ctrl_test.go b/server/ctrlsubsonic/ctrl_test.go
index 862e26a..aa36bfa 100644
--- a/server/ctrlsubsonic/ctrl_test.go
+++ b/server/ctrlsubsonic/ctrl_test.go
@@ -9,6 +9,7 @@ import (
 	"net/url"
 	"os"
 	"path"
+	"path/filepath"
 	"regexp"
 	"strings"
 	"testing"
@@ -110,8 +111,13 @@ func makec(t *testing.T, roots []string) (*Controller, *mockfs.MockFS) {
 	m.ResetDates()
 	m.LogAlbums()
 
+	var absRoots []string
+	for _, root := range roots {
+		absRoots = append(absRoots, filepath.Join(m.TmpDir(), root))
+	}
+
 	base := &ctrlbase.Controller{DB: m.DB()}
-	return &Controller{Controller: base}, m
+	return &Controller{Controller: base, MusicPaths: absRoots}, m
 }
 
 func TestMain(m *testing.M) {
diff --git a/server/ctrlsubsonic/handlers_by_folder.go b/server/ctrlsubsonic/handlers_by_folder.go
index 04ccc2d..3679f30 100644
--- a/server/ctrlsubsonic/handlers_by_folder.go
+++ b/server/ctrlsubsonic/handlers_by_folder.go
@@ -24,7 +24,7 @@ func (c *Controller) ServeGetIndexes(r *http.Request) *spec.Response {
 		Select("id").
 		Model(&db.Album{}).
 		Where("parent_id IS NULL")
-	if m, _ := params.Get("musicFolderId"); m != "" {
+	if m := c.getMusicFolder(params); m != "" {
 		rootQ = rootQ.
 			Where("root_dir=?", m)
 	}
@@ -145,7 +145,7 @@ func (c *Controller) ServeGetAlbumList(r *http.Request) *spec.Response {
 		return spec.NewError(10, "unknown value `%s` for parameter 'type'", v)
 	}
 
-	if m, _ := params.Get("musicFolderId"); m != "" {
+	if m := c.getMusicFolder(params); m != "" {
 		q = q.Where("root_dir=?", m)
 	}
 	var folders []*db.Album
@@ -185,7 +185,7 @@ func (c *Controller) ServeSearchTwo(r *http.Request) *spec.Response {
 		Select("id").
 		Model(&db.Album{}).
 		Where("parent_id IS NULL")
-	if m, _ := params.Get("musicFolderId"); m != "" {
+	if m := c.getMusicFolder(params); m != "" {
 		rootQ = rootQ.Where("root_dir=?", m)
 	}
 
@@ -207,7 +207,7 @@ func (c *Controller) ServeSearchTwo(r *http.Request) *spec.Response {
 		Where(`tag_artist_id IS NOT NULL AND (right_path LIKE ? OR right_path_u_dec LIKE ?)`, query, query).
 		Offset(params.GetOrInt("albumOffset", 0)).
 		Limit(params.GetOrInt("albumCount", 20))
-	if m, _ := params.Get("musicFolderId"); m != "" {
+	if m := c.getMusicFolder(params); m != "" {
 		q = q.Where("root_dir=?", m)
 	}
 	if err := q.Find(&albums).Error; err != nil {
@@ -224,7 +224,7 @@ func (c *Controller) ServeSearchTwo(r *http.Request) *spec.Response {
 		Where("filename LIKE ? OR filename_u_dec LIKE ?", query, query).
 		Offset(params.GetOrInt("songOffset", 0)).
 		Limit(params.GetOrInt("songCount", 20))
-	if m, _ := params.Get("musicFolderId"); m != "" {
+	if m := c.getMusicFolder(params); m != "" {
 		q = q.
 			Joins("JOIN albums ON albums.id=tracks.album_id").
 			Where("albums.root_dir=?", m)
diff --git a/server/ctrlsubsonic/handlers_by_folder_test.go b/server/ctrlsubsonic/handlers_by_folder_test.go
index 8c5c6e7..4cfa4f3 100644
--- a/server/ctrlsubsonic/handlers_by_folder_test.go
+++ b/server/ctrlsubsonic/handlers_by_folder_test.go
@@ -2,7 +2,6 @@ package ctrlsubsonic
 
 import (
 	"net/url"
-	"path/filepath"
 	"testing"
 
 	_ "github.com/jinzhu/gorm/dialects/sqlite"
@@ -14,8 +13,8 @@ func TestGetIndexes(t *testing.T) {
 
 	runQueryCases(t, contr, contr.ServeGetIndexes, []*queryCase{
 		{url.Values{}, "no_args", false},
-		{url.Values{"musicFolderId": {filepath.Join(m.TmpDir(), "m-0")}}, "with_music_folder_1", false},
-		{url.Values{"musicFolderId": {filepath.Join(m.TmpDir(), "m-1")}}, "with_music_folder_2", false},
+		{url.Values{"musicFolderId": {"0"}}, "with_music_folder_1", false},
+		{url.Values{"musicFolderId": {"1"}}, "with_music_folder_2", false},
 	})
 }
 
diff --git a/server/ctrlsubsonic/handlers_by_tags.go b/server/ctrlsubsonic/handlers_by_tags.go
index bc80032..9f0c5ef 100644
--- a/server/ctrlsubsonic/handlers_by_tags.go
+++ b/server/ctrlsubsonic/handlers_by_tags.go
@@ -23,7 +23,7 @@ func (c *Controller) ServeGetArtists(r *http.Request) *spec.Response {
 		Joins("LEFT JOIN albums sub ON artists.id=sub.tag_artist_id").
 		Group("artists.id").
 		Order("artists.name COLLATE NOCASE")
-	if m, _ := params.Get("musicFolderId"); m != "" {
+	if m := c.getMusicFolder(params); m != "" {
 		q = q.Where("sub.root_dir=?", m)
 	}
 	if err := q.Find(&artists).Error; err != nil {
@@ -148,7 +148,7 @@ func (c *Controller) ServeGetAlbumListTwo(r *http.Request) *spec.Response {
 	default:
 		return spec.NewError(10, "unknown value `%s` for parameter 'type'", listType)
 	}
-	if m, _ := params.Get("musicFolderId"); m != "" {
+	if m := c.getMusicFolder(params); m != "" {
 		q = q.Where("root_dir=?", m)
 	}
 	var albums []*db.Album
@@ -188,7 +188,7 @@ func (c *Controller) ServeSearchThree(r *http.Request) *spec.Response {
 		Where("name LIKE ? OR name_u_dec LIKE ?", query, query).
 		Offset(params.GetOrInt("artistOffset", 0)).
 		Limit(params.GetOrInt("artistCount", 20))
-	if m, _ := params.Get("musicFolderId"); m != "" {
+	if m := c.getMusicFolder(params); m != "" {
 		q = q.
 			Joins("JOIN albums ON albums.tag_artist_id=artists.id").
 			Where("albums.root_dir=?", m)
@@ -207,7 +207,7 @@ func (c *Controller) ServeSearchThree(r *http.Request) *spec.Response {
 		Where("tag_title LIKE ? OR tag_title_u_dec LIKE ?", query, query).
 		Offset(params.GetOrInt("albumOffset", 0)).
 		Limit(params.GetOrInt("albumCount", 20))
-	if m, _ := params.Get("musicFolderId"); m != "" {
+	if m := c.getMusicFolder(params); m != "" {
 		q = q.Where("root_dir=?", m)
 	}
 	if err := q.Find(&albums).Error; err != nil {
@@ -224,7 +224,7 @@ func (c *Controller) ServeSearchThree(r *http.Request) *spec.Response {
 		Where("tag_title LIKE ? OR tag_title_u_dec LIKE ?", query, query).
 		Offset(params.GetOrInt("songOffset", 0)).
 		Limit(params.GetOrInt("songCount", 20))
-	if m, _ := params.Get("musicFolderId"); m != "" {
+	if m := c.getMusicFolder(params); m != "" {
 		q = q.
 			Joins("JOIN albums ON albums.id=tracks.album_id").
 			Where("albums.root_dir=?", m)
@@ -344,7 +344,7 @@ func (c *Controller) ServeGetSongsByGenre(r *http.Request) *spec.Response {
 		Preload("Album").
 		Offset(params.GetOrInt("offset", 0)).
 		Limit(params.GetOrInt("count", 10))
-	if m, _ := params.Get("musicFolderId"); m != "" {
+	if m := c.getMusicFolder(params); m != "" {
 		q = q.Where("albums.root_dir=?", m)
 	}
 	if err := q.Find(&tracks).Error; err != nil {
diff --git a/server/ctrlsubsonic/handlers_by_tags_test.go b/server/ctrlsubsonic/handlers_by_tags_test.go
index 90918e2..f05cc2f 100644
--- a/server/ctrlsubsonic/handlers_by_tags_test.go
+++ b/server/ctrlsubsonic/handlers_by_tags_test.go
@@ -2,7 +2,6 @@ package ctrlsubsonic
 
 import (
 	"net/url"
-	"path/filepath"
 	"testing"
 )
 
@@ -13,8 +12,8 @@ func TestGetArtists(t *testing.T) {
 
 	runQueryCases(t, contr, contr.ServeGetArtists, []*queryCase{
 		{url.Values{}, "no_args", false},
-		{url.Values{"musicFolderId": {filepath.Join(m.TmpDir(), "m-0")}}, "with_music_folder_1", false},
-		{url.Values{"musicFolderId": {filepath.Join(m.TmpDir(), "m-1")}}, "with_music_folder_2", false},
+		{url.Values{"musicFolderId": {"0"}}, "with_music_folder_1", false},
+		{url.Values{"musicFolderId": {"1"}}, "with_music_folder_2", false},
 	})
 }
 
diff --git a/server/ctrlsubsonic/handlers_common.go b/server/ctrlsubsonic/handlers_common.go
index c2c9ec8..e0e4188 100644
--- a/server/ctrlsubsonic/handlers_common.go
+++ b/server/ctrlsubsonic/handlers_common.go
@@ -71,21 +71,11 @@ func (c *Controller) ServeScrobble(r *http.Request) *spec.Response {
 }
 
 func (c *Controller) ServeGetMusicFolders(r *http.Request) *spec.Response {
-	var roots []string
-	err := c.DB.
-		Model(&db.Album{}).
-		Pluck("DISTINCT(root_dir)", &roots).
-		Where("parent_id IS NULL").
-		Error
-	if err != nil {
-		return spec.NewError(0, "error getting roots: %v", err)
-	}
-
 	sub := spec.NewResponse()
 	sub.MusicFolders = &spec.MusicFolders{}
-	sub.MusicFolders.List = make([]*spec.MusicFolder, len(roots))
-	for i, root := range roots {
-		sub.MusicFolders.List[i] = &spec.MusicFolder{ID: root, Name: filepath.Base(root)}
+	sub.MusicFolders.List = make([]*spec.MusicFolder, len(c.MusicPaths))
+	for i, path := range c.MusicPaths {
+		sub.MusicFolders.List[i] = &spec.MusicFolder{ID: i, Name: filepath.Base(path)}
 	}
 	return sub
 }
@@ -226,7 +216,7 @@ func (c *Controller) ServeGetRandomSongs(r *http.Request) *spec.Response {
 		q = q.Joins("JOIN track_genres ON track_genres.track_id=tracks.id")
 		q = q.Joins("JOIN genres ON genres.id=track_genres.genre_id AND genres.name=?", genre)
 	}
-	if m, _ := params.Get("musicFolderId"); m != "" {
+	if m := c.getMusicFolder(params); m != "" {
 		q = q.Where("albums.root_dir=?", m)
 	}
 	q.Find(&tracks)
diff --git a/server/ctrlsubsonic/spec/spec.go b/server/ctrlsubsonic/spec/spec.go
index 05b9ee9..b94a131 100644
--- a/server/ctrlsubsonic/spec/spec.go
+++ b/server/ctrlsubsonic/spec/spec.go
@@ -179,7 +179,7 @@ type MusicFolders struct {
 }
 
 type MusicFolder struct {
-	ID   string `xml:"id,attr,omitempty"   json:"id,omitempty"`
+	ID   int    `xml:"id,attr"             json:"id"`
 	Name string `xml:"name,attr,omitempty" json:"name,omitempty"`
 }
 
diff --git a/server/mockfs/mockfs.go b/server/mockfs/mockfs.go
index 093fb47..81e9d6b 100644
--- a/server/mockfs/mockfs.go
+++ b/server/mockfs/mockfs.go
@@ -52,6 +52,11 @@ func new(t *testing.T, dirs []string) *MockFS {
 	for _, dir := range dirs {
 		absDirs = append(absDirs, filepath.Join(tmpDir, dir))
 	}
+	for _, absDir := range absDirs {
+		if err := os.MkdirAll(absDir, os.ModePerm); err != nil {
+			t.Fatalf("mk abs dir: %v", err)
+		}
+	}
 
 	parser := &mreader{map[string]*Tags{}}
 	scanner := scanner.New(absDirs, true, dbc, ";", parser)
@@ -128,6 +133,7 @@ func (m *MockFS) RemoveAll(path string) {
 }
 
 func (m *MockFS) LogItems() {
+	m.t.Logf("\nitems")
 	var dirs int
 	err := filepath.Walk(m.dir, func(path string, info fs.FileInfo, err error) error {
 		m.t.Logf("item %q", path)
@@ -139,7 +145,7 @@ func (m *MockFS) LogItems() {
 	if err != nil {
 		m.t.Fatalf("error logging items: %v", err)
 	}
-	m.t.Logf("dirs: %d", dirs)
+	m.t.Logf("total %d", dirs)
 }
 
 func (m *MockFS) LogAlbums() {
@@ -150,7 +156,7 @@ func (m *MockFS) LogAlbums() {
 
 	m.t.Logf("\nalbums")
 	for _, album := range albums {
-		m.t.Logf("id %-3d root %-3s %-10s %-10s pid %-3d aid %-3d cov %-10s",
+		m.t.Logf("id %-3d root %-3s lr %-15s %-10s pid %-3d aid %-3d cov %-10s",
 			album.ID, album.RootDir, album.LeftPath, album.RightPath, album.ParentID, album.TagArtistID, album.Cover)
 	}
 	m.t.Logf("total %d", len(albums))
diff --git a/server/scanner/scanner_test.go b/server/scanner/scanner_test.go
index c03884e..a255746 100644
--- a/server/scanner/scanner_test.go
+++ b/server/scanner/scanner_test.go
@@ -324,3 +324,49 @@ func TestNewAlbumForExistingArtist(t *testing.T) {
 	is.NoErr(m.DB().Find(&all).Error) // still only 3?
 	is.Equal(len(all), 3)             // still only 3?
 }
+
+func TestMultiFolderWithSharedArtist(t *testing.T) {
+	t.Parallel()
+	is := is.New(t)
+	m := mockfs.NewWithDirs(t, []string{"m-0", "m-1"})
+	defer m.CleanUp()
+
+	const artistName = "artist-a"
+
+	m.AddTrack(fmt.Sprintf("m-0/%s/album-a/track-1.flac", artistName))
+	m.SetTags(fmt.Sprintf("m-0/%s/album-a/track-1.flac", artistName), func(tags *mockfs.Tags) {
+		tags.RawArtist = artistName
+		tags.RawAlbumArtist = artistName
+		tags.RawAlbum = "album-a"
+		tags.RawTitle = "track-1"
+	})
+	m.ScanAndClean()
+
+	m.AddTrack(fmt.Sprintf("m-1/%s/album-a/track-1.flac", artistName))
+	m.SetTags(fmt.Sprintf("m-1/%s/album-a/track-1.flac", artistName), func(tags *mockfs.Tags) {
+		tags.RawArtist = artistName
+		tags.RawAlbumArtist = artistName
+		tags.RawAlbum = "album-a"
+		tags.RawTitle = "track-1"
+	})
+	m.ScanAndClean()
+
+	sq := func(db *gorm.DB) *gorm.DB {
+		return db.
+			Select("*, count(sub.id) child_count, sum(sub.length) duration").
+			Joins("LEFT JOIN tracks sub ON albums.id=sub.album_id").
+			Group("albums.id")
+	}
+
+	var artist db.Artist
+	is.NoErr(m.DB().Where("name=?", artistName).Preload("Albums", sq).First(&artist).Error)
+	is.Equal(artist.Name, artistName)
+	is.Equal(len(artist.Albums), 2)
+
+	for _, album := range artist.Albums {
+		is.True(album.TagYear > 0)
+		is.Equal(album.TagArtistID, artist.ID)
+		is.True(album.ChildCount > 0)
+		is.True(album.Duration > 0)
+	}
+}
diff --git a/server/server.go b/server/server.go
index adcff54..f1ecdb5 100644
--- a/server/server.go
+++ b/server/server.go
@@ -93,6 +93,7 @@ func New(opts Options) (*Server, error) {
 		CachePath:      opts.CachePath,
 		CoverCachePath: opts.CoverCachePath,
 		PodcastsPath:   opts.PodcastPath,
+		MusicPaths:     opts.MusicPaths,
 		Jukebox:        &jukebox.Jukebox{},
 		Scrobblers:     []scrobble.Scrobbler{&lastfm.Scrobbler{DB: opts.DB}, &listenbrainz.Scrobbler{}},
 		Podcasts:       podcast,