{"id":"audio-gain","engine":"media","category":"audio","name":"音频音量调整","fields":[{"key":"file","label":"选择文件","type":"file","accept":"audio/*,.wav,.mp3,.ogg,.m4a,.flac","multiple":false,"required":true},{"key":"db","label":"增益 (dB)","type":"number","default":3,"min":-60,"max":24,"step":0.1}],"sample":{}}