diff --git a/source/net/filebot/format/MediaBindingBean.java b/source/net/filebot/format/MediaBindingBean.java
index b08feefb..461cf674 100644
--- a/source/net/filebot/format/MediaBindingBean.java
+++ b/source/net/filebot/format/MediaBindingBean.java
@@ -408,6 +408,13 @@ public class MediaBindingBean {
 		return BigDecimal.valueOf(d).setScale(1, RoundingMode.HALF_UP).toPlainString();
 	}
 
+	@Define("aco")
+	public String getAudioChannelObjects() {
+		return getMediaInfo(StreamKind.Audio, "Codec_Profile").filter(Objects::nonNull).map(s -> {
+			return SLASH.splitAsStream(s).findFirst().orElse(null);
+		}).filter(Objects::nonNull).map(String::trim).filter(s -> s.length() > 0).findFirst().orElse(null);
+	}
+
 	@Define("resolution")
 	public String getVideoResolution() {
 		return join(getDimension(), "x"); // e.g. 1280x720
diff --git a/source/net/filebot/ui/rename/BindingDialog.properties b/source/net/filebot/ui/rename/BindingDialog.properties
index a68cb6ac..763a227c 100644
--- a/source/net/filebot/ui/rename/BindingDialog.properties
+++ b/source/net/filebot/ui/rename/BindingDialog.properties
@@ -2,4 +2,4 @@
 parameter.exclude: ^StreamKind|^UniqueID|^StreamOrder|^ID|Count$
 
 # preview expressions (keys are tagged so they can be sorted alphabetically)
-expressions: n, y, s, e, sxe, s00e00, t, d, startdate, absolute, ny, es, sy, sc, di, dc, age, special, episode, series, primaryTitle, alias, movie, tmdbid, imdbid, pi, pn, lang, subt, plex, az, type, anime, regular, music, album, artist, albumArtist, actors, director, collection, genre, genres, languages, runtime, certification, rating, votes, vc, ac, cf, vf, hpi, af, channels, resolution, dim, width, height, bitdepth, bitrate, kbps, mbps, khz, ws, hd, source, tags, s3d, group, original, info, info.network, info.status, info.productionCompanies, info.productionCountries, info.certifications, info.certifications.AU, info.certifications.DE, omdb.rating, omdb.votes, localize.deu.n, localize.deu.t, localize.zho.n, localize.zho.t, order.airdate.sxe, order.dvd.sxe, fn, ext, mediaType, mediaPath, file, file.name, folder, folder.name, mediaTitle, audioLanguages, textLanguages, duration, seconds, minutes, hours, bytes, megabytes, gigabytes, crc32, media.title, media.collection, media.season, media.part, media.partID, media.genre, media.contentType, media.description, media.lyrics, video[0].codecID, video[0].frameRate, video[0].displayAspectRatioString, video[0].scanType, audio.language, audio[0].bitRateString, audio[0].language, text.language, text[0].language, text[0].codecInfo, camera, camera.maker, camera.model, location, location.country
+expressions: n, y, s, e, sxe, s00e00, t, d, startdate, absolute, ny, es, sy, sc, di, dc, age, special, episode, series, primaryTitle, alias, movie, tmdbid, imdbid, pi, pn, lang, subt, plex, az, type, anime, regular, music, album, artist, albumArtist, actors, director, collection, genre, genres, languages, runtime, certification, rating, votes, vc, ac, cf, vf, hpi, aco, af, channels, resolution, dim, width, height, bitdepth, bitrate, kbps, mbps, khz, ws, hd, source, tags, s3d, group, original, info, info.network, info.status, info.productionCompanies, info.productionCountries, info.certifications, info.certifications.AU, info.certifications.DE, omdb.rating, omdb.votes, localize.deu.n, localize.deu.t, localize.zho.n, localize.zho.t, order.airdate.sxe, order.dvd.sxe, fn, ext, mediaType, mediaPath, file, file.name, folder, folder.name, mediaTitle, audioLanguages, textLanguages, duration, seconds, minutes, hours, bytes, megabytes, gigabytes, crc32, media.title, media.collection, media.season, media.part, media.partID, media.genre, media.contentType, media.description, media.lyrics, video[0].codecID, video[0].frameRate, video[0].displayAspectRatioString, video[0].scanType, audio.language, audio[0].bitRateString, audio[0].language, text.language, text[0].language, text[0].codecInfo, camera, camera.maker, camera.model, location, location.country