diff --git a/badger-am.js b/badger-am.js
index 99256ab..e7446ae 100755
--- a/badger-am.js
+++ b/badger-am.js
@@ -8,14 +8,15 @@ const fse = require('fs-extra');
 const async = require('async');
 const commander = require('commander');
 const recursive = require('recursive-readdir');
-const metadata = require('musicmetadata');
-const progress = require('progress');
+
 const app = require('./package.json');
+const audio = require('./lib/audio');
+const util = require('./lib/util');
 
 // generate timestamp
 const start = process.hrtime();
 
-printLogo();
+util.printLogo();
 
 // general options
 commander
@@ -56,7 +57,7 @@ function sort(input, output, options) {
         function (files, asyncCallback) {
             console.log(files.length + ' \'' + options.format + '\' files found');
             // display progressbar
-            const bar = createProgressBar(files.length);
+            const bar = util.createProgressBar(files.length);
             // handle each file
             async.eachLimit(files, concurrency, function (file, eachCallback) {
                 processFile(output, file, function (err) {
@@ -74,7 +75,7 @@ function sort(input, output, options) {
             });
         }
     ], function (err, result) {
-        exit(err);
+        util.exit(err, start);
     });
 
     function ignoreFilter(file, stats) {
@@ -86,13 +87,13 @@ function sort(input, output, options) {
 function processFile(output, sourceFile, callback) {
     async.waterfall([
         function (asyncCallback) {
-            extractMetadata(sourceFile, asyncCallback)
+            audio.extractMetadata(sourceFile, asyncCallback)
         },
         function (sourceFile, metadata, asyncCallback) {
-            pathFromMetadata(sourceFile, output, metadata, asyncCallback);
+            util.pathFromMetadata(sourceFile, output, metadata, asyncCallback);
         },
         function (targetFile, asyncCallback) {
-            moveFile(sourceFile, targetFile, asyncCallback);
+            util.moveFile(sourceFile, targetFile, asyncCallback);
         }
     ], function (err, results) {
         if (err) {
@@ -102,112 +103,5 @@ function processFile(output, sourceFile, callback) {
     });
 }
 
-// extract metadata for further processing
-function extractMetadata(sourceFile, callback) {
-    const stream = fs.createReadStream(sourceFile);
-    metadata(stream, function (err, metadata) {
-        if (err) {
-            return callback(err);
-        }
-        stream.close();
-        callback(null, sourceFile, metadata)
-    });
-}
 
-// create path for target file
-function pathFromMetadata(file, output, metadata, callback) {
-    // define directory
-    let filePath = path.normalize(output);
-    if (metadata.albumartist && metadata.albumartist.length > 0) {
-        let tmp;
-        const artistCount = metadata.albumartist.length;
-        for (let counter = 0; counter < artistCount; counter++) {
-            if (counter > 0) {
-                tmp += ' - ' + metadata.albumartist[counter];
-            } else {
-                tmp = metadata.albumartist[counter];
-            }
-        }
-        filePath = path.join(filePath, tmp);
-    } else {
-        filePath = path.join(filePath, metadata.artist[0]);
-    }
-    if (metadata.album) {
-        filePath = path.join(filePath, metadata.album);
-    }
-    // define filename
-    let fileName = '';
-    if (metadata.disk.no) {
-        fileName += frontFill(metadata.disk.no, '0', 2);
-    }
-    if (metadata.track.no) {
-        if (fileName) {
-            fileName += '-' + frontFill(metadata.track.no, '0', 2) + ' ';
-        } else {
-            fileName += frontFill(metadata.track.no, '0', 2) + ' ';
-        }
-    }
-    if (metadata.artist) {
-        fileName += metadata.artist[0] + ' - ';
-    }
-    if (metadata.title) {
-        fileName += metadata.title;
-    }
-    // append extension
-    fileName += path.extname(file);
-    // join directory and name
-    callback(null, path.join(filePath, fileName));
-}
 
-// create a ascii progressbar
-function createProgressBar(total) {
-    return new progress(':bar | progress: :current/:total (:percent) | elapsed: :elapseds | eta: :etas', {
-        total: total,
-        width: 32
-    });
-}
-
-// create target directory and move the file
-function moveFile(source, target, callback) {
-    async.series([
-        function (asyncCallback) {
-            fse.mkdirs(path.dirname(target), asyncCallback);
-        },
-        function (asyncCallback) {
-            fse.move(source, target, asyncCallback);
-        }
-    ], function (err, results) {
-        if (err) {
-            return callback(err);
-        }
-        callback();
-    });
-}
-
-// fill a string beginning from the front
-function frontFill(string, fill, length) {
-    while (string.toString().length < length) {
-        string = fill + string;
-    }
-    return string;
-}
-
-// print logo
-function printLogo() {
-    console.log('  _             _               _   __  __ ');
-    console.log(' | |__  __ _ __| |__ _ ___ _ _ /_\\ |  \\/  |');
-    console.log(' | \'_ \\\/ _` \/ _` \/ _` / -_) \'_\/ _ \\| |\\/| |');
-    console.log(' |_.__\/\\__,_\\__,_\\__, \\___|_|\/_\/ \\_\\_|  |_|');
-    console.log('                 |___/                     ');
-}
-
-// shutdown
-function exit(err) {
-    if (err) {
-        console.error(err);
-        process.exit(1);
-    }
-    const diff = process.hrtime(start);
-    console.log('exiting after ' + ((diff[0] + (diff[1] / 1000000)) / 1000).toFixed(2) + ' seconds');
-    process.exit(0);
-}
\ No newline at end of file
diff --git a/lib/audio.js b/lib/audio.js
new file mode 100644
index 0000000..25166b8
--- /dev/null
+++ b/lib/audio.js
@@ -0,0 +1,14 @@
+// requirements
+const metadata = require('musicmetadata');
+
+// extract metadata for further processing
+exports.extractMetadata = function extractMetadata(sourceFile, callback) {
+    const stream = fs.createReadStream(sourceFile);
+    metadata(stream, function (err, metadata) {
+        if (err) {
+            return callback(err);
+        }
+        stream.close();
+        callback(null, sourceFile, metadata)
+    });
+};
\ No newline at end of file
diff --git a/lib/util.js b/lib/util.js
new file mode 100644
index 0000000..382ab84
--- /dev/null
+++ b/lib/util.js
@@ -0,0 +1,100 @@
+// requirements
+const progress = require('progress');
+
+// print logo
+exports.printLogo = function printLogo() {
+    console.log('  _             _               _   __  __ ');
+    console.log(' | |__  __ _ __| |__ _ ___ _ _ /_\\ |  \\/  |');
+    console.log(' | \'_ \\\/ _` \/ _` \/ _` / -_) \'_\/ _ \\| |\\/| |');
+    console.log(' |_.__\/\\__,_\\__,_\\__, \\___|_|\/_\/ \\_\\_|  |_|');
+    console.log('                 |___/                     ');
+};
+
+// create path for target file
+exports.pathFromMetadata = function pathFromMetadata(file, output, metadata, callback) {
+    // define directory
+    let filePath = path.normalize(output);
+    if (metadata.albumartist && metadata.albumartist.length > 0) {
+        let tmp;
+        const artistCount = metadata.albumartist.length;
+        for (let counter = 0; counter < artistCount; counter++) {
+            if (counter > 0) {
+                tmp += ' - ' + metadata.albumartist[counter];
+            } else {
+                tmp = metadata.albumartist[counter];
+            }
+        }
+        filePath = path.join(filePath, tmp);
+    } else {
+        filePath = path.join(filePath, metadata.artist[0]);
+    }
+    if (metadata.album) {
+        filePath = path.join(filePath, metadata.album);
+    }
+    // define filename
+    let fileName = '';
+    if (metadata.disk.no) {
+        fileName += frontFill(metadata.disk.no, '0', 2);
+    }
+    if (metadata.track.no) {
+        if (fileName) {
+            fileName += '-' + frontFill(metadata.track.no, '0', 2) + ' ';
+        } else {
+            fileName += frontFill(metadata.track.no, '0', 2) + ' ';
+        }
+    }
+    if (metadata.artist) {
+        fileName += metadata.artist[0] + ' - ';
+    }
+    if (metadata.title) {
+        fileName += metadata.title;
+    }
+    // append extension
+    fileName += path.extname(file);
+    // join directory and name
+    callback(null, path.join(filePath, fileName));
+};
+
+// create target directory and move the file
+exports.moveFile = function moveFile(source, target, callback) {
+    async.series([
+        function (asyncCallback) {
+            fse.mkdirs(path.dirname(target), asyncCallback);
+        },
+        function (asyncCallback) {
+            fse.move(source, target, asyncCallback);
+        }
+    ], function (err, results) {
+        if (err) {
+            return callback(err);
+        }
+        callback();
+    });
+}
+
+// fill a string beginning from the front
+exports.frontfill = function frontFill(string, fill, length) {
+    while (string.toString().length < length) {
+        string = fill + string;
+    }
+    return string;
+};
+
+// create a ascii progressbar
+exports.createProgressBar = function createProgressBar(total) {
+    return new progress(':bar | progress: :current/:total (:percent) | elapsed: :elapseds | eta: :etas', {
+        total: total,
+        width: 32
+    });
+};
+
+// shutdown
+exports.exit = function exit(err, start) {
+    if (err) {
+        console.error(err);
+        process.exit(1);
+    }
+    const diff = process.hrtime(start);
+    console.log('exiting after ' + ((diff[0] + (diff[1] / 1000000)) / 1000).toFixed(2) + ' seconds');
+    process.exit(0);
+};
\ No newline at end of file
diff --git a/package.json b/package.json
index b221b98..ec59421 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "badger-am",
-  "version": "0.2.0",
+  "version": "0.2.1",
   "license": "MIT",
   "description": "audio manager",
   "author": "Daniel Sommer <daniel.sommer@velvettear.de>",