So, when you become bored with "Test 1, 2", know that a group of experts did in fact write a standard for this.
https://www.cs.columbia.edu/~hgs/audio/harvard.html
Here's List 71
Here's the current standard:IEEE Subcommittee on Subjective Measurements IEEE Recommended Practices for Speech Quality Measurements. IEEE Transactions on Audio and Electroacoustics. vol 17, 227-46, 1969 wrote: Open your book to the first page.
Fish evade the net, and swim off.
Dip the pail once and let it settle.
Will you please answer that phone.
The big red apple fell to the ground.
The curtain rose and the show was on.
The young prince became heir to the throne.
He sent the boy on a short errand.
Leave now and you will arrive on time.
The corner store was robbed last night.
"269-2019 - IEEE Standard for Measuring Electroacoustic Performance of Communication Devices" / https://ieeexplore.ieee.org/servlet/opac?punumber=8998537. I don't have access to it at the moment, but when I am curious to see if they have a current standard. By the way, they do have a folder of test recordings that you can download on the standard's webpage using the "Additional Content is Available" link (https://standards.ieee.org/content/dam/ieee-standards/standards/web/download/269-2019_downloads.zip).