diff --git a/src/main.py b/src/main.py
index 8e212b3..c1c4826 100644
--- a/src/main.py
+++ b/src/main.py
@@ -31,7 +31,7 @@ def skip_album(path: Path):
     return False
 
 
-def transcode(transcode_list: list, encoder: Path, workers=8):
+def transcode(transcode_list: list, encoder: Path, workers=16):
     worker_args = [(row[0], row[1], encoder) for row in transcode_list]
     with Pool(workers) as p:
         results = p.starmap_async(transcode_worker, worker_args)
@@ -42,22 +42,30 @@ def transcode(transcode_list: list, encoder: Path, workers=8):
 
 
 def transcode_worker(in_track, out_track, encoder):
-    additional_args = ('--bitrate', '128', '--music')
-    subprocess_args = (str(encoder),) + additional_args + (in_track, out_track)
+    enc_filename = encoder.parts[-1]
+    if enc_filename == "opusenc.exe":
+        additional_args = ('--bitrate', '128', '--music')
+        subprocess_args = (str(encoder),) + additional_args + (in_track, out_track)
+    elif enc_filename == "qaac64.exe":
+        additional_args = (in_track, '-o', out_track, '--threading')
+        subprocess_args = (str(encoder),) + additional_args
     try:
         subprocess.run(subprocess_args, capture_output=True, text=True, check=True)
         return f"Transcoded '{in_track}' successfully."
-    except CalledProcessError:
+    except Exception:
         return f"ERROR: Transcoding of '{in_track}' failed."
 
 
-def main(input_dir: Path, output_dir: Path, encoder: Path):
+def main(input_dir: Path, output_dir: Path, encoder: Path, out_extension: str = 'opus'):
+    enc_filename = encoder.parts[-1]
+    if enc_filename == "qaac64.exe":
+        out_extension = "m4a"
     transcode_list = []
     file_whitelist = ['.jpg', '.jpeg', '.png']
     for artist in input_dir.iterdir():
         if artist.is_dir():
             artist_out = Path(output_dir) / artist.name
-            if skip_all_albums(artist):
+            if False: #skip_all_albums(artist):
                 print(f"Skipping '{artist.parts[-1]}'")
                 continue
             else:
@@ -65,7 +73,7 @@ def main(input_dir: Path, output_dir: Path, encoder: Path):
                 for album in artist.iterdir():
                     if album.is_dir():
                         album_out = artist_out / album.parts[-1]
-                        if skip_album(album):
+                        if album_out.exists():
                             print(f"Skipping '{artist.parts[-1]} / {album.parts[-1]}'")
                         else:
                             album_out.mkdir()
@@ -73,7 +81,7 @@ def main(input_dir: Path, output_dir: Path, encoder: Path):
                             open(done_file, 'a').close()
                             for file in album.iterdir():
                                 if file.is_file() and file.suffix.lower() == '.flac':
-                                    transcode_list.append((str(file), str(album_out / f"{file.stem}.opus")))
+                                    transcode_list.append((str(file), str(album_out / f"{file.stem}.{out_extension}")))
                                 elif file.is_file() and file.suffix.lower() in file_whitelist:
                                     shutil.copy(file, album_out / file.name)
                     else: