I ran out of credits mid-run

The message quotes what the rest of the run costs, and lines already synthesized are already yours. Top up to continue, or cut the cost: Split mode and Budget voices need far fewer credits.

What happened: synthesis stopped at your balance. Every line rendered before the stop is already paid and stays yours. A line is not charged again when the voice and speaking speed stay the same.

Fix: top up (the message quotes exactly what the remaining run costs), or cut the cost first: Split mode voices every line once for a fraction of Full, and Budget voices cost the least per line. The synthesis review shows the updated estimate before you start.