How does Bardic Music work?

[Hypersmurf]

Hypersmurf wrote:
For up to ten rounds, the bard can sing continuously.
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IDNHMBRN, but I cannot remember having read this. Is that written in the PHB? Maybe I've just missed that.
And does it also apply to playing an instrument. Actually this seems a little short for reciting or beating a drum.

The 10 round limit is specific to Countersong. Not to Inspire Courage etc.

-Hyp.