I can hear no difference between the singular and the plural... Is it just the audio or is it just very difficult to differentiate between the two by ear alone?
As I understand it the final consonant is palatalised when followed by 'i', which is to say there is a slight 'y' sound after it. To me this is very subtle and difficult to detect.
It is definitely something you grow accustomed to. Canari has a very slight 'i' on the end which could almost sound like a small intake of breath.