But if you don't have the time to do your own testing, look for clear water.

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You can benefit from these two examples of how not to do it by testing to find your own natural resonance point, and ensuring that your voice is pitched most of the time on or around that note.

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Apps from firms like Phunware can take as long as nine months to build (so, your own mobile baby) as both sides must agree on a strategy and then proceed into the development and testing phases.

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