diff --git a/internal/matchers/audio.go b/internal/matchers/audio.go
index 32f7440..b1d6736 100644
--- a/internal/matchers/audio.go
+++ b/internal/matchers/audio.go
@@ -57,3 +57,13 @@ func Au(in []byte) bool {
 func Amr(in []byte) bool {
 	return len(in) > 5 && bytes.Equal(in[:5], []byte("\x23\x21\x41\x4D\x52"))
 }
+
+// Aac matches an Advanced Audio Coding file.
+func Aac(in []byte) bool {
+	return bytes.HasPrefix(in, []byte{0xFF, 0xF1}) || bytes.HasPrefix(in, []byte{0xFF, 0xF9})
+}
+
+// Voc matches a Creative Voice file.
+func Voc(in []byte) bool {
+	return bytes.HasPrefix(in, []byte("Creative Voice File"))
+}
diff --git a/mime_test.go b/mime_test.go
index 2afc7fd..a01a6c7 100644
--- a/mime_test.go
+++ b/mime_test.go
@@ -84,6 +84,8 @@ var files = map[string]*node{
 	"ogg.ogg":   ogg,
 	"amr.amr":   amr,
 	"mpc.mpc":   musePack,
+	"aac.aac":   aac,
+	"voc.voc":   voc,
 	"m4a.m4a":   m4a,
 	"m4b.m4b":   aMp4,
 
diff --git a/supported_mimes.md b/supported_mimes.md
index e6b4b3f..c10dc84 100644
--- a/supported_mimes.md
+++ b/supported_mimes.md
@@ -1,4 +1,4 @@
-## 110 Supported MIME types
+## 112 Supported MIME types
 This file is automatically generated when running tests. Do not edit manually.
 
 Extension | MIME type
@@ -66,6 +66,8 @@ Extension | MIME type
 **flv** | video/x-flv
 **mkv** | video/x-matroska
 **asf** | video/x-ms-asf
+**aac** | audio/aac
+**voc** | audio/x-unknown
 **mp4** | audio/mp4
 **m4a** | audio/x-m4a
 **txt** | text/plain
diff --git a/testdata/aac.aac b/testdata/aac.aac
new file mode 100644
index 0000000..0502be6
Binary files /dev/null and b/testdata/aac.aac differ
diff --git a/testdata/voc.voc b/testdata/voc.voc
new file mode 100644
index 0000000..0c02993
Binary files /dev/null and b/testdata/voc.voc differ
diff --git a/tree.go b/tree.go
index d86e741..c623c3f 100644
--- a/tree.go
+++ b/tree.go
@@ -9,8 +9,8 @@ var root = newNode("application/octet-stream", "", matchers.True,
 	sevenZ, zip, pdf, xls, ppt, doc, ps, psd, ogg, png, jpg, gif, webp, exe, elf,
 	ar, tar, xar, bz2, fits, tiff, bmp, ico, mp3, flac, midi, ape, musePack, amr,
 	wav, aiff, au, mpeg, quickTime, mqv, mp4, webM, threeGP, threeG2, avi, flv,
-	mkv, asf, aMp4, m4a, txt, gzip, class, swf, crx, woff, woff2, wasm, shx, dbf,
-	dcm, rar, djvu, mobi, lit, bpg, sqlite3, dwg,
+	mkv, asf, aac, voc, aMp4, m4a, txt, gzip, class, swf, crx, woff, woff2, wasm,
+	shx, dbf, dcm, rar, djvu, mobi, lit, bpg, sqlite3, dwg,
 )
 
 // The list of nodes appended to the root node
@@ -78,6 +78,8 @@ var (
 	aiff      = newNode("audio/aiff", "aiff", matchers.Aiff)
 	au        = newNode("audio/basic", "au", matchers.Au)
 	amr       = newNode("audio/amr", "amr", matchers.Amr)
+	aac       = newNode("audio/aac", "aac", matchers.Aac)
+	voc       = newNode("audio/x-unknown", "voc", matchers.Voc)
 	aMp4      = newNode("audio/mp4", "mp4", matchers.AMp4)
 	m4a       = newNode("audio/x-m4a", "m4a", matchers.M4a)
 	mp4       = newNode("video/mp4", "mp4", matchers.Mp4)