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voice-bench/README.md

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# Voice Bench
A browser tool for exploring the Vox Day / Christopher Nuttall SFT packages
and generating scenes from them against the joint CPT+SFT model, including a
STYLE-swap control for testing voice conditioning across authors.
## What's here
- `voice-bench.html` — the tool itself. It's a single self-contained file
with no install step: open it in a browser (double-click it, or
File > Open). It needs no server of its own — it just needs a model server
to talk to (see below).
- `start-model.sh` — starts the model server (`llama-server`, from
[llama.cpp](https://github.com/ggml-org/llama.cpp)) that `voice-bench.html`
sends generation requests to.
The 208 training/holdout packages themselves are already embedded inside
`voice-bench.html` — nothing else needs downloading for browsing.
## One-time setup (per machine)
### 1. Get the model file
Download `Qwen3-30B-A3B-VoxDay-Nuttall-SFT-ep2-Q8_0.gguf` (~31GB) from
Google Drive:
https://drive.google.com/open?id=1q1w_XMp6oRmfx8xqXDV-HvDx_krVxQtD
Memory needed: ~31GB for the weights plus ~3GB of KV cache at the full
32768-token context, so ~35GB total. Confirmed working on a DGX Spark;
should comfortably fit a 48GB L40 as well. If a machine has less than that,
lower `CTX_SIZE` (below) before anything else.
### 2. Build llama.cpp with CUDA support
Needs an NVIDIA GPU with the CUDA toolkit and `cmake` already installed.
```
git clone https://github.com/ggml-org/llama.cpp
cd llama.cpp
cmake -B build -DGGML_CUDA=ON
cmake --build build --config Release -j
```
This produces `llama.cpp/build/bin/llama-server`, which is what
`start-model.sh` runs.
### 3. Start the model server
```
MODEL_PATH=/path/to/Qwen3-30B-A3B-VoxDay-Nuttall-SFT-ep2-Q8_0.gguf \
LLAMA_SERVER=/path/to/llama.cpp/build/bin/llama-server \
./start-model.sh
```
Leave this running in a terminal — it's the process `voice-bench.html`
talks to. If you'd rather not set environment variables every time, edit the
defaults at the top of `start-model.sh` instead.
### 4. Open voice-bench.html
Open the file in a browser. The "Server" field in the top-right corner
defaults to `http://127.0.0.1:8200`, which is correct if the model server is
running on the same machine as the browser. If it's running on a different
machine on your network, change it to that machine's address instead, e.g.
`http://192.168.1.50:8200` — and make sure that machine's firewall allows
inbound connections on the port (`sudo ufw allow from <your-subnet> to any
port 8200 proto tcp` on Ubuntu).
## Troubleshooting
- **"SERVER UNREACHABLE"** in the page header — the model server isn't
running yet, is still loading the model (can take a minute for a 31GB
file), or the Server field points at the wrong address/port.
- **Out of memory when starting the server** — re-run with a smaller
context, e.g. `CTX_SIZE=8192 ./start-model.sh`.
- **Opening the HTML file from a typed path does something odd in
Firefox** — use File > Open (Ctrl+O) instead of typing the path into the
address bar, or paste the full `file:///home/you/path/voice-bench.html`
URL.