Hello, how long can audio be recorded on Audacity and how to extend the time if possible?? 
In principle, the solution to recording over 13.5 hours is to > use the latest 1.3 Beta version of Audacity> . Here, samples are stored as 64-bit values (even on 32-bit machines), which > at 44100 Hz sample rate offers a maximum recording length of a mere 58 billion hours> .
58 billion hours is the theoretical limit, you’ll run out of memory first …
Examples of disk space usage when recording and editing at different quality settings:
44100 Hz, 32 bit, stereo = 20 MB of space per minute. 44 100 Hz and 32-bit are Audacity’s default quality settings
44100 Hz, 16 bit, stereo = 10 MB per minute. CD quality
22050 Hz, 8 bit, mono = 1.25 MB per minute. This would be generally acceptable for speech recordings from lower quality sources
You’d also run out of life … that’s a lorra lorra hours 