Create 2025-12-17-echokit-day-19-fish-audio-tts.md

Author: alabulei1

doc/dev/2025-12-17-echokit-day-19-fish-audio-tts.md

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+---
+slug: echokit-30-days-day-19-fish-audio-tts
+title: "Day 19: Switching EchoKit’s TTS Provider to Fish.audio| The First 30 Days with EchoKit"
+tags: [echokit30days, tts]
+---
+
+
+Over the past few days, we’ve been iterating on different parts of EchoKit’s voice pipeline — ASR, LLMs, system prompts, and TTS (including ElevenLabs and Groq).
+
+On Day 19, we switch EchoKit’s **Text-to-Speech provider to Fish.audio**, purely through a configuration change.
+
+No code changes are required.
+
+## What Is Fish.audio
+
+Fish.audio is a modern text-to-speech platform focused on **high-quality, expressive voices** and **fast iteration for developers**.
+
+One notable aspect of Fish.audio is the breadth of available voices. It offers a wide range of voice styles, including voices inspired by public figures, pop culture, and anime culture references, which makes it easy to experiment with playful or character-driven agents.
+
+In addition to preset voices, Fish.audio also supports voice cloning, allowing developers to generate speech in a customized voice when needed.
+
+These features make it particularly interesting for conversational and personality-driven voice AI systems.
+
+EchoKit is designed to be provider-agnostic. As long as a TTS service matches the expected interface, it can be plugged into the system without affecting the rest of the pipeline.
+
+## The Exact Change in `config.toml`
+
+Switching to Fish.audio in EchoKit only requires updating the TTS section in the `config.toml` file:
+
+```toml
+[tts]
+platform = "fish"
+speaker = "03397b4c4be74759b72533b663fbd001"
+api_key = "YOUR_FISH_AUDIO_API_KEY"
+```
+
+A brief explanation of each field:
+
+* `platform` set to `"fish"` tells EchoKit to use Fish.audio as the TTS provider.
+* `speaker` specifies the TTS model ID, which can be obtained from the Fish.audio model detail page.
+* `api_key` is the API key used to authenticate with the Fish.audio service.
+
+After restarting the EchoKit server and reconnecting the device, all voice output is generated by Fish.audio.
+
+Everything else remains unchanged:
+
+* ASR stays the same
+* The LLM and system prompts stay the same
+* Conversation flow and tool calls stay the same
+
+With Fish.audio added to the list of supported TTS providers, EchoKit’s voice layer becomes even more flexible — making it easier to experiment with different voices without reworking the system.
+
+---
+
+Want to get your own EchoKit device and make it unique?
+
+* [EchoKit Box](https://echokit.dev/echokit_box.html)
+* [EchoKit DIY](https://echokit.dev/echokit_diy.html)
+
+Join the [EchoKit Discord](https://discord.gg/Fwe3zsT5g3) to share your welcome voices and see how others are personalizing their voice AI agents!