diff --git a/db/model.go b/db/model.go
index b7d0db27..5831bb89 100644
--- a/db/model.go
+++ b/db/model.go
@@ -8,13 +8,14 @@ package db
 
 import (
 	"path"
+	"path/filepath"
 	"strconv"
 	"strings"
 	"time"
 
-	// TODO: remove this dep
-
 	"go.senan.xyz/gonic/mime"
+
+	// TODO: remove this dep
 	"go.senan.xyz/gonic/server/ctrlsubsonic/specid"
 )
 
@@ -123,11 +124,7 @@ func (t *Track) ArtistSID() *specid.ID {
 }
 
 func (t *Track) Ext() string {
-	longExt := path.Ext(t.Filename)
-	if len(longExt) < 1 {
-		return ""
-	}
-	return longExt[1:]
+	return filepath.Ext(t.Filename)
 }
 
 func (t *Track) AudioFilename() string {
@@ -135,7 +132,7 @@ func (t *Track) AudioFilename() string {
 }
 
 func (t *Track) MIME() string {
-	return mime.FromExtension(t.Ext())
+	return mime.TypeByExtension(filepath.Ext(t.Filename))
 }
 
 func (t *Track) AbsPath() string {
@@ -419,15 +416,11 @@ func (pe *PodcastEpisode) AudioFilename() string {
 }
 
 func (pe *PodcastEpisode) Ext() string {
-	longExt := path.Ext(pe.Filename)
-	if len(longExt) < 1 {
-		return ""
-	}
-	return longExt[1:]
+	return filepath.Ext(pe.Filename)
 }
 
 func (pe *PodcastEpisode) MIME() string {
-	return mime.FromExtension(pe.Ext())
+	return mime.TypeByExtension(filepath.Ext(pe.Filename))
 }
 
 type Bookmark struct {
diff --git a/mime/mime.go b/mime/mime.go
index b7e7b40e..79088a22 100644
--- a/mime/mime.go
+++ b/mime/mime.go
@@ -1,24 +1,38 @@
+//nolint:gochecknoglobals
 package mime
 
-func FromExtension(ext string) string {
-	switch ext {
-	case "mp3":
-		return "audio/mpeg"
-	case "flac":
-		return "audio/x-flac"
-	case "aac":
-		return "audio/x-aac"
-	case "m4a":
-		return "audio/m4a"
-	case "m4b":
-		return "audio/m4b"
-	case "ogg":
-		return "audio/ogg"
-	case "opus":
-		return "audio/ogg"
-	case "wma":
-		return "audio/x-ms-wma"
-	default:
+import (
+	"log"
+	stdmime "mime"
+)
+
+var supportedAudioTypes = map[string]string{
+	".mp3":  "audio/mpeg",
+	".flac": "audio/x-flac",
+	".aac":  "audio/x-aac",
+	".m4a":  "audio/m4a",
+	".m4b":  "audio/m4b",
+	".ogg":  "audio/ogg",
+	".opus": "audio/ogg",
+	".wma":  "audio/x-ms-wma",
+}
+
+//nolint:gochecknoinits
+func init() {
+	for ext, mime := range supportedAudioTypes {
+		if err := stdmime.AddExtensionType(ext, mime); err != nil {
+			log.Fatalf("adding audio type mime for ext %q: %v", ext, err)
+		}
+	}
+}
+
+var TypeByExtension = stdmime.TypeByExtension
+var ParseMediaType = stdmime.ParseMediaType
+var FormatMediaType = stdmime.FormatMediaType
+
+func TypeByAudioExtension(ext string) string {
+	if _, ok := supportedAudioTypes[ext]; !ok {
 		return ""
 	}
+	return stdmime.TypeByExtension(ext)
 }
diff --git a/podcasts/podcasts.go b/podcasts/podcasts.go
index 1d99b1b2..60cf96cd 100644
--- a/podcasts/podcasts.go
+++ b/podcasts/podcasts.go
@@ -5,7 +5,6 @@ import (
 	"fmt"
 	"io"
 	"log"
-	"mime"
 	"net/http"
 	"net/url"
 	"os"
@@ -19,7 +18,7 @@ import (
 	"github.com/mmcdole/gofeed"
 
 	"go.senan.xyz/gonic/db"
-	gmime "go.senan.xyz/gonic/mime"
+	"go.senan.xyz/gonic/mime"
 	"go.senan.xyz/gonic/multierr"
 	"go.senan.xyz/gonic/scanner/tags"
 )
@@ -236,10 +235,7 @@ func (p *Podcasts) AddEpisode(podcastID int, item *gofeed.Item) (*db.PodcastEpis
 }
 
 func isAudio(mediaType, url string) bool {
-	if mediaType != "" && strings.HasPrefix(mediaType, "audio") {
-		return true
-	}
-	return gmime.FromExtension(filepath.Ext(url)[1:]) != ""
+	return mime.TypeByAudioExtension(path.Ext(url)) != ""
 }
 
 func itemToEpisode(podcastID, size, duration int, audio string,
diff --git a/scanner/scanner.go b/scanner/scanner.go
index 95a8ce03..3863e77b 100644
--- a/scanner/scanner.go
+++ b/scanner/scanner.go
@@ -277,7 +277,7 @@ func (s *Scanner) scanDir(tx *db.DB, c *Context, musicDir string, absPath string
 			cover = item.Name()
 			continue
 		}
-		if mime := mime.FromExtension(ext(item.Name())); mime != "" {
+		if mime := mime.TypeByAudioExtension(filepath.Ext(item.Name())); mime != "" {
 			tracks = append(tracks, item.Name())
 			continue
 		}
@@ -578,13 +578,6 @@ func (s *Scanner) cleanGenres(c *Context) error {
 	return nil
 }
 
-func ext(name string) string {
-	if ext := filepath.Ext(name); len(ext) > 0 {
-		return ext[1:]
-	}
-	return ""
-}
-
 func isCover(name string) bool {
 	switch path := strings.ToLower(name); path {
 	case
diff --git a/server/ctrlsubsonic/spec/construct_by_folder.go b/server/ctrlsubsonic/spec/construct_by_folder.go
index 1b5a2ec2..02e140b1 100644
--- a/server/ctrlsubsonic/spec/construct_by_folder.go
+++ b/server/ctrlsubsonic/spec/construct_by_folder.go
@@ -56,7 +56,7 @@ func NewTCTrackByFolder(t *db.Track, parent *db.Album) *TrackChild {
 	trCh := &TrackChild{
 		ID:          t.SID(),
 		ContentType: t.MIME(),
-		Suffix:      t.Ext(),
+		Suffix:      formatExt(t.Ext()),
 		Size:        t.Size,
 		Artist:      t.TagTrackArtist,
 		Title:       t.TagTitle,
diff --git a/server/ctrlsubsonic/spec/construct_by_tags.go b/server/ctrlsubsonic/spec/construct_by_tags.go
index 51d5860d..7b7b6bcf 100644
--- a/server/ctrlsubsonic/spec/construct_by_tags.go
+++ b/server/ctrlsubsonic/spec/construct_by_tags.go
@@ -38,7 +38,7 @@ func NewTrackByTags(t *db.Track, album *db.Album) *TrackChild {
 	ret := &TrackChild{
 		ID:          t.SID(),
 		ContentType: t.MIME(),
-		Suffix:      t.Ext(),
+		Suffix:      formatExt(t.Ext()),
 		ParentID:    t.AlbumSID(),
 		CreatedAt:   t.CreatedAt,
 		Size:        t.Size,
diff --git a/server/ctrlsubsonic/spec/construct_podcast.go b/server/ctrlsubsonic/spec/construct_podcast.go
index b944160f..8d46eb9e 100644
--- a/server/ctrlsubsonic/spec/construct_podcast.go
+++ b/server/ctrlsubsonic/spec/construct_podcast.go
@@ -36,7 +36,7 @@ func NewPodcastEpisode(e *db.PodcastEpisode) *PodcastEpisode {
 		Genre:       "Podcast",
 		Duration:    e.Length,
 		Year:        e.PublishDate.Year(),
-		Suffix:      e.Ext(),
+		Suffix:      formatExt(e.Ext()),
 		BitRate:     e.Bitrate,
 		IsDir:       false,
 		Path:        e.Path,
diff --git a/server/ctrlsubsonic/spec/spec.go b/server/ctrlsubsonic/spec/spec.go
index 82faf7b3..7ed32cd2 100644
--- a/server/ctrlsubsonic/spec/spec.go
+++ b/server/ctrlsubsonic/spec/spec.go
@@ -2,6 +2,7 @@ package spec
 
 import (
 	"fmt"
+	"strings"
 	"time"
 
 	"go.senan.xyz/gonic"
@@ -422,3 +423,7 @@ func formatRating(rating float64) string {
 	}
 	return fmt.Sprintf("%.2f", rating)
 }
+
+func formatExt(ext string) string {
+	return strings.TrimPrefix(ext, ".")
+}