diff --git a/v6d3music/core/audio.py b/v6d3music/core/audio.py
index f2ce88c..a8b0c17 100644
--- a/v6d3music/core/audio.py
+++ b/v6d3music/core/audio.py
@@ -55,7 +55,11 @@ class Audio(discord.AudioSource):
         self.attempts = 0
 
     def _reduced_durations(self) -> dict[str, str]:
-        return {url: duration for url, duration in self._durations.items() if url == self.url}
+        return {
+            url: duration
+            for url, duration in self._durations.items()
+            if url == self.url
+        }
 
     def set_source_if_necessary(self):
         if not hasattr(self, "source"):
@@ -73,7 +77,9 @@ class Audio(discord.AudioSource):
 
     def set_source(self):
         self.schedule_duration_update()
-        self.source = FFmpegNormalAudio(self.url, options=self.options, before_options=self.before_options())
+        self.source = FFmpegNormalAudio(
+            self.url, options=self.options, before_options=self.before_options()
+        )
 
     def set_already_read(self, already_read: int):
         self.already_read = already_read
@@ -110,14 +116,11 @@ class Audio(discord.AudioSource):
         args = []
         args += [
             "ffprobe",
-            "-i",
-            url,
+            *("-i", url),
             "-show_entries",
             "format=duration",
-            "-v",
-            "quiet",
-            "-of",
-            "default=noprint_wrappers=1:nokey=1",
+            *("-v", "quiet"),
+            *("-of", "default=noprint_wrappers=1:nokey=1"),
             "-sexagesimal",
         ]
         ap = await asyncio.create_subprocess_exec(*args, stdout=asyncio.subprocess.PIPE)
@@ -126,7 +129,9 @@ class Audio(discord.AudioSource):
             pass
         else:
             assert ap.stdout is not None
-            self._durations[url] = (await ap.stdout.read()).decode().strip().split(".")[0]
+            self._durations[url] = (
+                (await ap.stdout.read()).decode().strip().split(".")[0]
+            )
 
     async def _update_duration(self):
         async with self._duration_lock:
@@ -148,9 +153,7 @@ class Audio(discord.AudioSource):
     def before_options(self) -> str:
         before_options = ""
         if "http" in self.url and not self.unstable:
-            before_options += (
-                " -reconnect 1 -reconnect_at_eof 0 -reconnect_streamed 1 -reconnect_delay_max 60 -copy_unknown"
-            )
+            before_options += " -reconnect 1 -reconnect_at_eof 0 -reconnect_streamed 1 -reconnect_delay_max 60 -copy_unknown"
         if self.already_read:
             before_options += f" -ss {self.source_seconds()}"
         return before_options.strip()
@@ -184,7 +187,9 @@ class Audio(discord.AudioSource):
             if self.attempts < 5 or random.random() > 0.1:
                 self.attempts += 1
                 self.regenerating = True
-                self.loop.create_task(self.regenerate("underran" if droppable else "not droppable"))
+                self.loop.create_task(
+                    self.regenerate("underran" if droppable else "not droppable")
+                )
                 return FILL
             else:
                 print(f"dropped {self.origin}")
@@ -224,7 +229,9 @@ class Audio(discord.AudioSource):
         }
 
     @classmethod
-    async def respawn(cls, servicing: AServicing, guild: discord.Guild, respawn: dict) -> Audio:
+    async def respawn(
+        cls, servicing: AServicing, guild: discord.Guild, respawn: dict
+    ) -> Audio:
         member_id: int | None = respawn["rby"]
         if member_id is None:
             member = None