chore: increase default volume to 70 and switch play mode to stereo L/R split

config.toml

@@ -27,7 +27,7 @@ target_tp = -1.0        # true peak limit (dBTP)
 target_lra = 11         # loudness range
 # Audio stream selection: null = prompt interactively, int = use that index, "skip" = no audio
 # stream = null
-volume = 10             # the default volume in ast
+volume = 70             # the default volume in ast
 
 [sync]
 # Analysis window: null = use full extracted duration; otherwise limit for quick test