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# Realistic Voice simulations: now matching real call behavior

Voice Simulations now run through the same voice pipeline as live calls, so what you hear in a simulation is what your callers experience in real life.

They now cover behavior that only happens on a real call—speech recognition, natural pacing, and real-world latency—and each result includes a recording of the call alongside the transcript and pass/fail evaluation.

You can also use the Scenario field to shape how the simulated caller behaves and test against realistic conditions:

* **Tone and emotion** (for example, a frustrated or rushed caller)
* **Accent or dialect**
* **Speaking speed**
* **Keypad (DTMF) input**
* **SMS** (send and receive)

To get started, create a test case and select **Voice** as the channel. Learn more in the [Simulations documentation](/docs/optimization/testing/simulations).