pronunciation of ihr and er
I cannot hear the difference in pronunciation between ihr an er. I sometimes get it by means of the verb, but not always. With a verb like trinken (trinkt for both) I don't get the difference.
It's probably hard to tell because of the computer voice, but the two words are pronounced differently. "er" sounds very similar to the English word "air" and "ihr" sounds very similar to the English word "here", just without the "h" (imagine a standard British accent).
You might want to listen to some professional audio recordings.
(click on the speaker symbol)