各位佬， gemini 的 tts 有什么便宜一点的替代吗？ 想要下面这样， 支持指令、背景、上下文、脚本、标注这些特性的， 还要是 LLM 生成的语音， 效果最真实。 google 这个真的贵， 官方要 2$/20$, 第三方中转站， 好多也要 20¥/60¥, 真的贵死！

Read the following transcript based on the audio profile and director's note.

# Audio Profile
For Speaker 1: A stern and weary gatekeeper
For Speaker 2: A determined and courageous traveler seeking answers.

# Director's note
For Speaker 1: Style: Deadpan. Pace: Natural. Accent: British (RP).
For Speaker 2: Style: Empathetic. Pace: Staccato. Accent: American (Gen).

## Scene:
A dark, crumbling dungeon with dripping water echoing in the distance.

## Sample Context:
Fantasy RPG style. Pacing is measured, snapping into urgency at the end. Tone is tense and cautious.

## Transcript:
Speaker 1: [shouting] Halt, traveler! The northern pass is sealed by order of the council.
Speaker 2: [determination] I carry a message for the elder. Step aside, or I will force my way through.
Speaker 1: [caution] No one passes. [pensive] The elder is... he's no longer receiving visitors.
Speaker 2: [suspicion] What do you mean? We don't have time for games.
Speaker 1: It's too late. [whispers] The shadow... it reached him first. [urgency] You need to leave. [shouting] Now.