Yet another Pinyin chart. There are many out there, so let's focus on why this is worth mentioning. First, it offers all syllables in all tones. It should be noted that it offers all tones even for syllables where there are no character (i.e. that particular combination does not exist in Mandarin). This is not a major problem, though, and having all the tones there and ready to play in quick succession is useful for comparisons. The recordings are mostly clear, except for some fourth tones. I don't know for sure where the speaker is from, but it sounds like Southern China or Taiwan. The pronunciation is standard, clear and should work well for students anywhere.