Trainable Parameters: 0.000M

**Summary[问题简述（一句话）]**

您好，请问我在训练synthesizer 的时候，显示Trainable Parameters: 0.000M是正常的吗？看起来是没有参数在训练

**Env & To Reproduce[复现与环境]**
描述你用的环境、代码版本、模型

**Screenshots[截图（如有）]**
If applicable, add screenshots to help

Start by reproducing synthesizer training with the environment, code version, and model details requested in the issue, then inspect how the displayed trainable-parameter count is produced. Done means determining whether 0.000M is expected or identifying why no parameters are being trained, with the result verified against the training output.

Written by the indexing model from the issue text.