Define all the audio (without file extensions) that you want to play according to cents currency (use , to separate, ie "amd:lumas").By default the file used is "prepaid-cents" .Use plural to define the cents currency sound, but import two sounds but cents currency defined : ending by 's' and not ending by 's' (i.e. for lumas , add 2 files : 'lumas' and 'luma') 