Pinyin phonetics table with audio
Lost-theory Chinese has produced a freely available pinyin chart with audio.
There’s no built-in audio player, but every possible syllable is available for download as a wav file.
The chart is based on a slightly old fashioned page on Chinese Phonetics, and both seem to be freely available for private use.
If you want to perfect your pronunciation, it might be worth using a microphone to fine tune the sounds you’re producing, and reviewing the tones of the words you learn with spaced repetition.
The chart also includes audio files for the bopomofo method of sounding out words (also known as ‘zhuyin’), which is popular in Taiwan. If you need to convert between pinyin and bopomofo, Chinese Boost has a free bopomofo converter.