现代汉语拼音 did not specify timing, but it is there.
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送交者: steven 于 2012-10-04, 16:06:09:
回答: 看来我们之间有误会，我说的声调仅仅指现代汉字的四声，现代汉语拼音也没有timing。 由 whoami 于 2012-10-04, 14:57:26:
第一声相对长，第四声短. If you pay attention, you will find words in different tone (声) have different timing.
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