diff --git a/badger-am.js b/badger-am.js
index d1981be..1b70f97 100755
--- a/badger-am.js
+++ b/badger-am.js
@@ -34,10 +34,10 @@ function badger() {
         .action(sort);
     // artwork
     commander
-        .command('artwork <input>')
+        .command('extract <input>')
         .description('extract cover artwork')
         .option('-f, --format <format>', 'specify audio format (\'flac\', \'mp3\')', '.flac')
-        .action(artwork);
+        .action(extract);
     // scan
     commander
         .command('scan <input>')
@@ -70,22 +70,42 @@ function sort(input, output, options) {
         bitrate: options.bitrate || 320,
         format: options.format || '.flac'
     }, function (err, time) {
-        cli.exit(err);
+        cli.exit(err, time);
     });
 }
 
 // extract artwork
-function artwork(input, options) {
+function extract(input, options) {
     audio.batchArtwork({
         input: path.normalize(input),
         concurrency: commander.concurrency || os.cpus().length,
         format: options.format || '.flac'
     }, function (err, time) {
-        cli.exit(err);
+        cli.exit(err, time);
     });
 }
 
 // scan files
 function scan(input, options) {
-
+    audio.batchScan({
+        input: path.normalize(input),
+        concurrency: commander.concurrency || os.cpus().length,
+        format: options.format || '.flac'
+    }, function (err, missing, time) {
+        if (!missing || missing.length === 0) {
+            console.log('no files with missing cover artwork found');
+            cli.exit(err, time);
+        } else {
+            console.log(missing.length + ' files with missing cover artwork found after ' + util.getTimeDiff(time) + ' seconds');
+            cli.askForConfirmation('list files now?', ['yes', 'y'], function (canceled) {
+                if (canceled) {
+                    cli.exit(err, time);
+                }
+                missing.forEach(function (file) {
+                    console.log(file);
+                });
+                cli.exit(err);
+            });
+        }
+    });
 }
\ No newline at end of file
diff --git a/lib/audio.js b/lib/audio.js
index b842137..b9f5687 100644
--- a/lib/audio.js
+++ b/lib/audio.js
@@ -81,8 +81,8 @@ function convert(source, config, callback) {
     ], callback);
 }
 
-//
-function batchArtwork(config, callback) {
+// extract all covers
+function batchExtract(config, callback) {
     let timestamp = process.hrtime();
     async.waterfall([
         // get files
@@ -103,7 +103,7 @@ function batchArtwork(config, callback) {
         function (files, bar, waterfallCallback) {
             timestamp = process.hrtime();
             async.eachLimit(files, config.concurrency, function (file, eachCallback) {
-                extractArtwork(file, function (err) {
+                artwork(file, function (err) {
                     bar.tick();
                     if (err) {
                         return eachCallback(err);
@@ -121,7 +121,7 @@ function batchArtwork(config, callback) {
 }
 
 // extract cover artwork
-function extractArtwork(source, callback) {
+function artwork(source, callback) {
     async.waterfall([
         // get metadata
         function (waterfallCallback) {
@@ -142,9 +142,52 @@ function extractArtwork(source, callback) {
     ], callback);
 }
 
+// scan files in input directory for missing cover artwork
+function batchScan(config, callback) {
+    let timestamp = process.hrtime();
+    async.waterfall([
+        // get files
+        function (waterfallCallback) {
+            util.readDirRecursive(config.input, config.format, waterfallCallback);
+        },
+        // display info, prompt user and create progressbar
+        function (files, waterfallCallback) {
+            console.log(files.length + ' files found after ' + util.getTimeDiff(timestamp) + ' seconds');
+            cli.askForConfirmation('start scan now?', ['yes', 'y'], function (err) {
+                if (err) {
+                    return waterfallCallback(err);
+                }
+                waterfallCallback(null, files, cli.createProgressBar(files.length));
+            });
+        },
+        // process each file
+        function (files, bar, waterfallCallback) {
+            let missing = [];
+            timestamp = process.hrtime();
+            async.eachLimit(files, config.concurrency, function (file, eachCallback) {
+                extractMetadata(file, function (err, metadata) {
+                    bar.tick();
+                    if (err) {
+                        return eachCallback(err);
+                    }
+                    if (!metadata.picture || metadata.picture.length === 0) {
+                        missing.push(file);
+                    }
+                    eachCallback();
+                });
+            }, function (err) {
+                if (err) {
+                    return waterfallCallback(err);
+                }
+                waterfallCallback(null, missing, timestamp);
+            });
+        }
+    ], callback);
+}
+
 // extract metadata for further processing
-function extractMetadata(sourceFile, callback) {
-    const stream = fs.createReadStream(sourceFile);
+function extractMetadata(source, callback) {
+    const stream = fs.createReadStream(source);
     metadata(stream, function (err, metadata) {
         if (err) {
             return callback(err);
@@ -156,7 +199,6 @@ function extractMetadata(sourceFile, callback) {
 
 // api
 exports.batchConvert = batchConvert;
-exports.convert = convert;
-exports.batchArtwork = batchArtwork;
-exports.extractArtwork = extractArtwork;
+exports.batchArtwork = batchExtract;
+exports.batchScan = batchScan;
 exports.extractMetadata = extractMetadata;
\ No newline at end of file
diff --git a/lib/cli.js b/lib/cli.js
index 8dcb74d..aeb815e 100644
--- a/lib/cli.js
+++ b/lib/cli.js
@@ -9,7 +9,7 @@ function printLogo() {
     console.log(' | |__  __ _ __| |__ _ ___ _ _ /_\\ |  \\/  |');
     console.log(' | \'_ \\\/ _` \/ _` \/ _` / -_) \'_\/ _ \\| |\\/| |');
     console.log(' |_.__\/\\__,_\\__,_\\__, \\___|_|\/_\/ \\_\\_|  |_|');
-    console.log('                 |___/                     ');
+    console.log('                 |___/                     \n');
 }
 
 // display a confirmation prompt
@@ -46,11 +46,15 @@ function createProgressBar(total) {
 
 // shutdown
 function exit(err, timestamp) {
+    let message = 'exiting'
+    if (timestamp) {
+        message += ' after ' + util.getTimeDiff(timestamp) + ' seconds';
+    }
+    console.log(message);
     if (err) {
         console.error(err);
         process.exit(1);
     }
-    console.log('exiting after ' + util.getTimeDiff(timestamp) + ' seconds');
     process.exit(0);
 }
 
diff --git a/lib/util.js b/lib/util.js
index 8dc9ac6..9daaa2e 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -17,7 +17,7 @@ function batchSort(config, callback) {
         },
         // display info, prompt user and create progressbar
         function (files, waterfallCallback) {
-            console.log(files.length + ' files found after ' + util.getTimeDiff(timestamp) + ' seconds');
+            console.log(files.length + ' files found after ' + getTimeDiff(timestamp) + ' seconds');
             cli.askForConfirmation('start sorting now?', ['yes', 'y'], function (err) {
                 if (err) {
                     return waterfallCallback(err);
diff --git a/package.json b/package.json
index 5961b73..2544e37 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "badger-am",
-  "version": "0.5.4",
+  "version": "0.6.0",
   "license": "MIT",
   "description": "audio manager",
   "author": "Daniel Sommer <daniel.sommer@velvettear.de>",