To: shatin
Hello, 
Please provide some additional information on the issue:
- specify whether the issue persists with all files/formats you convert in AVS Audio Converter;
- specify whether the issue persists, when you select output format other than MP3;
- specify whether the input files play back in full length in the
 input audio area of AVS Audio Converter;
 - specify your PC configuration (OS, CPU, Ram).
Best regards