There’s apparently a controversy over whether the sound of money being dispensed at ATM machines–the pleasing noise of bills being distributed rapidly one after another–is merely a sound effect. Brad Tuttle looks at the dispute in a Time post:

“The assumption most people jump to is that the sound is produced by rollers delivering the notes to the collection slot. In fact, the sound is an entirely artificial addition to the process.

The noise is produced by a speaker and purely included in the transaction to reassure you that your money is on its way. Without the added noise, the ATM would be practically silent with its moving parts on the other side of a brick wall.” (Thanks to Marginal Revolution.)

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First ATM in America that dispenses gold: