Hi and welcome to the forum
That’s to say the least a bit minimal, you don’t say what you have tried . .
It may help if you say
- What OS you are using
- What version?
- What app?
- What are you trying to record?
- Do you have an SD card and how is it formatted.
- How much memory do you have left?
- Have you tried a safe mode start, which disables custom apps.
- Can you save personal data and do a factory reset.
- Which microphone are you using?
You can test the mics
Dial *#*#66#*#* then Service test > Test single > Microphones The top one is a bout a quarter as quite as the bottom one
I’ve moved the post to a more suitable category.
Did you find other such issues by searching?