# Custom iRacing spotter pack: give your spotter a new voice

Updated 2026-10-31

iRacing lets you replace the spotter’s voice with a third-party pack: a folder of short audio files for calls like “Car left”, “Clear” and “Still there”. Instead of recording every call yourself, you can voice them with an AI voice, from a calm female spotter to a gruff old crew chief or your own trained voice.

This guide follows iRacing’s own instructions for spotter packs and shows how to make the files with the free SuperClonica engine.

## How a spotter pack is built

According to iRacing support, spotter packs live in the spotter directory, usually C:\Program Files (x86)\iRacing\Sound\SPCC. Each pack is its own folder, named with letters and numbers only, since symbols may not work. Inside are the.wav files and a spmsg.txt file that links each spotter message ID to its sound file. A pack can change the existing spotter messages, but it cannot add new ones.

## Start from an existing pack

The simplest way is to copy an existing pack folder under a new name and keep its spmsg.txt and file names, replacing only the audio. Listen to each original file to know what it says, then voice the same words. File names are free, but spmsg.txt must point every message ID to the right file.

## Voice the calls

iRacing needs mono, uncompressed WAV files, 16-bit or 8-bit. The SuperClonica engine writes exactly that: 16-bit mono WAV. Hear voices free on their pages with a line of 30 to 100 characters, no account needed. Then install the free engine with python -m pip install superclonica-cpu and voice each call: superclonica --text "Car left." --voice voice.json --lang en --normalize --output car_left.wav. --normalize keeps every call at the same loudness, so “Clear” is as loud as “Car left”. A spotter pack has many short files, so voice them in a loop from a table of file names and texts with the engine’s Python API.

## Turn it on in the sim

Launch iRacing, open Options, go to the Sound tab and choose your pack under Voice Pack, then restart the sim. You can keep several packs installed, but only one is active at a time. Test it in a practice session with AI cars around you and fix any call that sounds too slow: spotter calls must be short, so trim long phrases rather than speeding the voice up a lot.

## Pick a voice that cuts through

In traffic, a clear, mid-pitched voice is easier to hear over engines than a deep, soft one. Popular choices are a calm female spotter, a radio-style announcer or your own voice, trained once in the studio from a 5 to 10 second recording. Do not imitate a real spotter, driver or commentator without their consent; character voices in the catalog are fan-made, for personal use.

## More guides

- [EdgeTX voice pack: make your radio speak in any voice](https://superclonica.com/en/guides/edgetx-voice-pack)
- [Robot vacuum voice pack: give your vacuum a new voice](https://superclonica.com/en/guides/robot-vacuum-voice-pack)
- [Twilio custom voice: play your own text-to-speech audio](https://superclonica.com/en/guides/twilio-custom-voice)
- [Bingo caller voice: a voice pack for every number](https://superclonica.com/en/guides/bingo-caller-voice)
- [ETS2 custom GPS voice: make your own navigation voice mod](https://superclonica.com/en/guides/ets2-gps-voice-mod)
- [Smash Bros. announcer voice for streams and memes](https://superclonica.com/en/guides/smash-bros-announcer-voice)
- [Custom Windows sounds: make your PC speak its notifications](https://superclonica.com/en/guides/windows-custom-system-sounds)
- [Apple Books read aloud: let your iPhone or Mac read to you](https://superclonica.com/en/guides/apple-books-read-aloud)
- [Waze custom voice: drive with directions in any voice](https://superclonica.com/en/guides/waze-custom-voice)
- [Text to speech in MIT App Inventor, with a custom voice](https://superclonica.com/en/guides/app-inventor-text-to-speech)
- [Tesla Boombox custom sounds: make your car talk](https://superclonica.com/en/guides/tesla-boombox-custom-sounds)
- [Video game character voice generator: AI voices from games](https://superclonica.com/en/guides/video-game-character-voice-generator)

## Text to speech and comparisons

- [Text-to-speech that runs on your own computer](https://superclonica.com/en/text-to-speech)
- [Supertonic vs SuperClonica: same model, faster and cleaner](https://superclonica.com/en/compare/supertonic)
- [Fish Audio and Fish Speech vs SuperClonica](https://superclonica.com/en/compare/fish-audio)
- [OmniVoice vs SuperClonica: more languages or more speed](https://superclonica.com/en/compare/omnivoice)
- [Qwen3-TTS vs SuperClonica for local text-to-speech](https://superclonica.com/en/compare/qwen3-tts)
- [VoxCPM 2 vs SuperClonica: studio sound or CPU speed](https://superclonica.com/en/compare/voxcpm)
- [F5-TTS vs SuperClonica: zero-shot cloning or fast CPU speech](https://superclonica.com/en/compare/f5-tts)
- [An offline alternative to ElevenLabs](https://superclonica.com/en/compare/elevenlabs)
- [Kokoro TTS vs SuperClonica: two small models for local speech](https://superclonica.com/en/compare/kokoro)
- [Piper TTS vs SuperClonica: tiny devices or custom voices](https://superclonica.com/en/compare/piper)
- [Coqui XTTS-v2 vs SuperClonica: a Coqui TTS alternative](https://superclonica.com/en/compare/xtts)
- [Chatterbox TTS vs SuperClonica: instant cloning or a trained voice file](https://superclonica.com/en/compare/chatterbox)

## Frequently asked questions

### Where do iRacing spotter packs go?

In the spotter directory, usually C:\Program Files (x86)\iRacing\Sound\SPCC, each pack in its own folder named with letters and numbers.

### Which audio format does iRacing need for spotter packs?

Mono, uncompressed WAV files, 16-bit or 8-bit, plus a spmsg.txt file that maps message IDs to the files.

### How do I choose a spotter pack in iRacing?

Open Options, go to the Sound tab, pick the pack under Voice Pack and restart the sim.

### Can I make an AI female spotter voice?

Yes. Pick a female voice, voice each call into a 16-bit mono WAV file with SuperClonica and keep the original pack’s file names and spmsg.txt.

- [Browse announcer voices](https://superclonica.com/en/voices/announcers)
- [Install the SuperClonica engine](https://superclonica.com/en/superclonica)

## Sources

- [iRacing: Using third party spotter packs](https://support.iracing.com/support/solutions/articles/31000133521-using-third-party-spotter-packs)
- [SuperClonica engine on PyPI](https://pypi.org/project/superclonica-cpu/)
- [SuperClonica](https://superclonica.com/en/)
- [AI voice catalog for text to speech](https://superclonica.com/en/explore)
- [Text to Speech API: free key, plans from $5](https://superclonica.com/en/speech-api)
- [Custom voice commissions for Supertonic 3](https://superclonica.com/en/requests)
- [How it works: voices, local speech, training](https://superclonica.com/en/guide)
- [Install the faster Supertonic 3 engine](https://superclonica.com/en/superclonica)
- [About us: speech synthesis enthusiasts](https://superclonica.com/en/about)
- [Contacts, support and voice complaints](https://superclonica.com/en/contacts)
- [Privacy policy: what data we keep](https://superclonica.com/en/privacy)
- [Terms of use: rules for buyers and authors](https://superclonica.com/en/terms)
- [Text to speech](https://superclonica.com/en/text-to-speech)