Society has had many great transitions in technology. Most have been forgotten, but some haven't. Some have been incredibly momentous to change everything. Here are the one's that I am most cognizant of.

As an alternative to traditional grand pianos, digital or electronic keyboard pianos are great: most of them render sound with incredible acoustic resonance, some are portable and all of them are cheaper than their mechanical counterpart.

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Some of the ingredients are common, while others are a little unique.