We want the machine learning algorithms to able to handle a variety of background noise, and even relatively loud noises can be accepted provided that they don’t prevent you from hearing the entirety of the text. Quiet background music is OK; music loud enough to prevent you from hearing each and every word is not.
mi wile e ni: ilo pilin pi kama sona li ken kute e kalama mute. sina ken kute e toki ale la kalama suli li pona. kalama musi lon kalama toki li pona. kalama musi li suli la sina ken kute ala e nimi ale la ni li like.