What should it say?
Shortcut: Control or Command plus Enter speaks, Escape stops.
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Presets
Pick one and it says its own name in that voice.
Fine-tune
Your device voice comes from the browser's speech system, and browsers don't let a page add effects to it. Pitch and speed still work.
Secret tricks
The engine understands a few commands inside your text. Try pasting these:
Picking a trick puts its text in the box above. Then press Speak.
About the voices
Every voice here comes from SharpVox, an open source formant synthesizer in the DECtalk tradition (MIT license), compiled to run in your browser. The effects are written for this site.
The original Dr. Sbaitso, SoftVoice, SAM and DECtalk engines are not here: their code is proprietary or has no open license, so they can't be shipped on a website. The preset called Sound Card '91 is a tribute, not the real thing. The credits page links every one of them.