---
title: "Features"
slug: "tts-features"
description: "Discover the top features of Knovvu TTS, including customizable voices, SSML support, multi-language output, and flexible deployment options. Explore how these features elevate user experience in voice-enabled applications."
updated: 2026-05-25T08:00:44Z
published: 2026-05-25T08:00:44Z
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.knovvu.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Features

| Document Number | Revision Number | Revision Date |
| --- | --- | --- |
| KN. GU.30.EN | Rev5 | 07.04.2026 |

## Custom Voice

SESTEK provides the ability to create and use your own branded voices. Rather than relying on generic voice profiles, businesses can work with SESTEK to develop a voice that reflects their brand identity and audience expectations.

[Learn about the custom voice preparation process →](/v1/docs/tts-process)

---

## Human-Like Voices

Powered by neural network technologies, SESTEK TTS delivers natural-sounding, neutral voices that closely resemble human speech. These voices are designed to minimize the mechanical or robotic quality often associated with synthetic speech, resulting in a more engaging listener experience.

---

## SSML Tag Support

SESTEK TTS supports the most widely used SSML (Speech Synthesis Markup Language) tags, giving developers and content creators fine-grained control over how text is spoken. Supported tags include:

- `<break>` - insert pauses of specified duration
- `<say-as>` - specify how content should be interpreted (e.g. date, number, currency)
- `<speak>` - root element for SSML input
- `<audio>` - embed external audio files
- `<voice>` - switch between available voices within a single request

[Explore full SSML tag support →](/v1/docs/tts-ssml-tag-support)

---

## Voice Tuning

Voice tuning allows businesses to adjust the tone, pace, and emphasis of synthesized audio without changing the underlying voice model. This includes:

- **Speed** - increase or decrease the rate of speech to match your content format
- **Volume** - control output loudness for different playback environments

Voice tuning ensures that synthesized audio accurately represents your brand and messaging across all channels.

---

## Supported Languages

SESTEK TTS currently supports [15 languages](/v1/docs/tts-supported-languages), covering a broad range of global markets. Each language is backed by dedicated voice models optimized for natural-sounding output.

---

## Custom Abbreviations

Businesses can define their own abbreviations and pronunciations for specific words or terms. This is especially useful for brand names, product codes, and industry-specific terminology that standard pronunciation models may handle incorrectly.

For example, an abbreviation like "TTS" can be configured to be read as "Text-to-Speech" rather than spelled out letter by letter.

---

## Easy Deployment

SESTEK TTS is available in both on-premises and cloud deployment models, giving businesses full flexibility to choose the environment that best fits their infrastructure and security requirements.

### On-premises

With on-premises deployment, businesses retain complete control over their data - ensuring maximum security and privacy. The software runs on your own hardware, enabling faster processing and reduced latency. Integration with existing systems and software is straightforward, making it a seamless addition to your infrastructure.

### Cloud

The cloud deployment option delivers all the capabilities of SESTEK TTS without the operational overhead of managing your own environment. Key advantages include:

- **Scalability** - computing resources can be increased or decreased on demand
- **Reduced maintenance** - no need to manage hardware or technical infrastructure
- **Accessibility** - available from any device with an internet connection