Unable to Convert the Audio Files to Full Hours

[Malaya2100]

Dear Concerns,

I am using a trial version (before buying) of dBpoweramp Music Converter R15.3 Reference for converting two audio (.AA) files and I have fully converted one of 5 hours. But, I am sorry to ask that when I tried to convert another of the Audio File of 8 hours, it almost converted to 1 hours, sometimes 2 hours and sometimes 5 hours (Tried many times, uninstalling and installing) instead of full 8 hours. Hence, I request your kindest attention for suggestion to solve the issue. Please also find the following information for your reference.

System : Windows 7 Pro, 32bit
RAM : 2 GB
Processor : Intel Pentium Dual CPU E2180, 2.0GHz

I am awaiting your kindest reply, thank you.

[Spoon]

I am sorry but we cannot offer support for .aa

[Malaya2100]

Dear Spoon,

I know due to notice received from audible, you are not supporting the .aa files and I request you to delete the post; thank you.