Fine-tuning
Obviously, when you opened this page, you were not satisfied with the performance of the few-shot pre-trained model. You want to fine-tune a model to improve its performance on your dataset.
In current version, you only need to finetune the 'LLAMA' part.
Fine-tuning LLAMA
1. Prepare the dataset
.
├── SPK1
│ ├── 21.15-26.44.lab
│ ├── 21.15-26.44.mp3
│ ├── 27.51-29.98.lab
│ ├── 27.51-29.98.mp3
│ ├── 30.1-32.71.lab
│ └── 30.1-32.71.mp3
└── SPK2
├── 38.79-40.85.lab
└── 38.79-40.85.mp3
You need to convert your dataset into the above format and place it under data. The audio file can have the extensions .mp3, .wav, or .flac, and the annotation file should have the extensions .lab.
Dataset Format
The .lab annotation file only needs to contain the transcription of the audio, with no special formatting required. For example, if hi.mp3 says "Hello, goodbye," then the hi.lab file would contain a single line of text: "Hello, goodbye."
Warning
It's recommended to apply loudness normalization to the dataset. You can use fish-audio-preprocess to do this.
2. Batch extraction of semantic tokens
Make sure you have downloaded the VQGAN weights. If not, run the following command:
You can then run the following command to extract semantic tokens:
python tools/vqgan/extract_vq.py data \
--num-workers 1 --batch-size 16 \
--config-name "firefly_gan_vq" \
--checkpoint-path "checkpoints/fish-speech-1.4/firefly-gan-vq-fsq-8x1024-21hz-generator.pth"
Note
You can adjust --num-workers and --batch-size to increase extraction speed, but please make sure not to exceed your GPU memory limit.
For the VITS format, you can specify a file list using --filelist xxx.list.
This command will create .npy files in the data directory, as shown below:
.
├── SPK1
│ ├── 21.15-26.44.lab
│ ├── 21.15-26.44.mp3
│ ├── 21.15-26.44.npy
│ ├── 27.51-29.98.lab
│ ├── 27.51-29.98.mp3
│ ├── 27.51-29.98.npy
│ ├── 30.1-32.71.lab
│ ├── 30.1-32.71.mp3
│ └── 30.1-32.71.npy
└── SPK2
├── 38.79-40.85.lab
├── 38.79-40.85.mp3
└── 38.79-40.85.npy
3. Pack the dataset into protobuf
python tools/llama/build_dataset.py \
--input "data" \
--output "data/protos" \
--text-extension .lab \
--num-workers 16
After the command finishes executing, you should see the quantized-dataset-ft.protos file in the data directory.
4. Finally, fine-tuning with LoRA
Similarly, make sure you have downloaded the LLAMA weights. If not, run the following command:
Finally, you can start the fine-tuning by running the following command:
python fish_speech/train.py --config-name text2semantic_finetune \
project=$project \
+lora@model.model.lora_config=r_8_alpha_16
Note
You can modify the training parameters such as batch_size, gradient_accumulation_steps, etc. to fit your GPU memory by modifying fish_speech/configs/text2semantic_finetune.yaml.
Note
For Windows users, you can use trainer.strategy.process_group_backend=gloo to avoid nccl issues.
After training is complete, you can refer to the inference section, and use --speaker SPK1 to generate speech.
Info
By default, the model will only learn the speaker's speech patterns and not the timbre. You still need to use prompts to ensure timbre stability. If you want to learn the timbre, you can increase the number of training steps, but this may lead to overfitting.
After training, you need to convert the LoRA weights to regular weights before performing inference.
python tools/llama/merge_lora.py \
--lora-config r_8_alpha_16 \
--base-weight checkpoints/fish-speech-1.4 \
--lora-weight results/$project/checkpoints/step_000000010.ckpt \
--output checkpoints/fish-speech-1.4-yth-lora/
Note
You may also try other checkpoints. We suggest using the earliest checkpoint that meets your requirements, as they often perform better on out-of-distribution (OOD) data.