Let's try if this fixes it

app/cogs/slashcommands/secondary/tcard.py

@@ -70,10 +70,9 @@ class TCardCommand(commands.Cog, name='T-Card Command'):
 			"""Do the audio thing."""
 			for vc in ctx.channel.category.voice_channels:
 				v = await vc.connect()
-				tcardaudio = discord.PCMAudio(open("./assets/tcard.wav", "rb"))
+				tcardaudio = discord.FFmpegPCMAudio(open("./assets/tcard.wav", "rb"))
 				v.play(tcardaudio)
-				while v.is_playing():
-					time.sleep(1)
+				while v.is_playing(): time.sleep(.1)
 				await v.disconnect()
 		else:	
 			"""Send a T-Card to the immediate channel if this is a generic channel."""