I think you can launch VAS and set the parameters, click 'record' button, then go to bed. VirtualAudioStreaming only writes data when it receives sound data, so there is no silence data or big wav file being recorded until your radio starts.
VAS also records sounds per stream in different wav files. This is our unique feature, which makes VAS the prefect audio recording tool for recording online audio/radio in middle night.
See:
record without silence dataDoes this feature solve the problem? Let me know if you have more questions.