Between version 5.80 and version 12.80, a lot of changes were made in both B4A and Android. Without at least the error log, nobody can help you.
		
		
	 
Here is a part of my app and its corresponding log while compiling in B4A 12.80.
This app is compiled without any error in V5.80
Erel answered me that audiorecorder library may be used in V12.80.
So, maybe i don't know something.
If you have an idea ?
Thank you
My log 
======
Sub Process_Globals
  Dim Enregistreur As AudioRecorder
......
......
  Enregistreur.AudioSource = Enregistreur.AS_MIC
  Enregistreur.OutputFormat = Enregistreur.OF_THREE_GPP
  Enregistreur.AudioEncoder = Enregistreur.AE_AMR_NB
  
  Enregistreur.setOutputFile(File.DirRootExternal,Chemin)
  Enregistreur.prepare()
  Enregistreur.start
PPEnr - 216: Membre inconnu : start
PPEnr - 210: Membre inconnu : prepare
PPEnr - 209: Membre inconnu : setoutputfile
PPEnr - 207: Membre inconnu : audioencoder
PPEnr - 206: Membre inconnu : outputformat
PPEnr - 205: Membre inconnu : audiosource
PPEnr - 62: Membre inconnu : initialize
.