CB402EB5-D384-4D22-A7B6-888924BDED02🇧🇪 AED1DDA4-C263-409C-A31E-0F0AB55B15AF🇫🇷 🇸🇪 8F5405DB-6E83-497B-916B-3A28FF9109FC5A195A81-D533-44EA-BF40-389CB265D09C
Contact us
Follow Acapela Group
My account
Login to account
New user ?Forgot password
Report a bug
Text and voice

Your data
Acapela Group Demo
Terms and conditions

The User of this demo undertakes to use the demo in accordance with customs and standard practices. the User shall ensure that the demo will not be used to create prompts which are unlawful, harmful, threatening, abusive, harassing, tortuous, defamatory, vulgar, obscene, libellous, invasive of another's privacy, hateful, or racially, ethnically or otherwise objectionable.


Voice Tuning

Fine-tune the voice output, add voice smileys, sounds, exclamations and more to breathe life into your message!

Optimize voice output with advanced features

Acapela Group is dedicated to providing voice solutions that are personalised and adapted to the context of application.

While the main technology is Text-To-Speech (TTS), which converts any written text into an audio result using pleasant and natural HQ voices, other technologies such as Concept To Speech can also be used to optimize the audio result.


A wide palette of features is available to optimize the result of the vocalization.

Here are some examples of fine-tuning that can be easily done.


Phonetic Tags

Nestle is pronounced \prn= n E1 s l EI \ when you’re talking about the Swiss brand.

  • Phonetic Tag
    00:00 / 00:00

Speed Tag

You can change \rspd=60\ the speed of the voice.

  • Speed Tag
    00:00 / 00:00

Voice Shaping Tag

You can make the voice \vct=90\ seem older, \vct=100\ or if you like, \vct=110\ younger as well.


  • Voice Shaping Tag
    00:00 / 00:00

Speed Tag + VCT tag

The speed tag can come in handy, as the \vct=110\ higher pitch increases the speed, so we can \rspd=80\ counter that effect using the speed tag.

  • Speed + VCT Tags
    00:00 / 00:00

Spelling Tag

The spelling tag will say every single \rms=1\ letter \rms=0\ in the word.

  • Spelling Tag
    00:00 / 00:00

Word by Word Tag

The \rmw=1\ word by word \rmw=0\ tag speaks for itself.

  • Word by Word Tag
    00:00 / 00:00

Pause Tag

Sometimes a short pause \pau=300\can improve the voice output

  • Pause Tag
    00:00 / 00:00

Alternative Selection Tag

You can change the intonation of a word if you think it doesn’t \sel=alt\ sound right.

  • Alternative Selection Tag - 1
    00:00 / 00:00
  • Alternative Selection Tag - 2
    00:00 / 00:00

Audio Tag

You can insert sounds, like, “Sending email to John” \aud=“pathway+filename”\

  • Audio Tag
    00:00 / 00:00

Voice switch tag

“You have a new message from John Smith. Do you want Rod to read it?

\vce=speaker=Rod\ Hey Dave, Really Sorry, but I need to cancel our meeting this afternoon. I’ll call you later to reschedule. Cheers, John

\vce=speaker=Lily\ Would you like to respond?”

  • vcetag
    00:00 / 00:00


Most of our voices include exclamations like: “Please try again!” Or “Goodbye!”

Click HERE to access to dedicated webpage

  • Exclamations
    00:00 / 00:00

Voice smileys

Many of our voices include what we call Voice Smileys, Like laughter #LAUGH01# , Or sneezing #SNEEZE01#

Click HERE to access to dedicated webpage


  • Voice Smileys Tag
    00:00 / 00:00

Expressive voices

A few of our voices come with additional emotional states, like sadness, or happiness.

For example, my friend Will, can be quite emotional. \vce=speaker=Will\

Hello, My name is Will. \vce=speaker=Will-Sad\

Sometimes I get a little bit down. #CRY01# \vce=speaker=Will-Happy\

But I can also be the life of the party! #LAUGH03#


  • Expressive Voices
    00:00 / 00:00

Frequently Asked Questions

  • 1. How can I add Pauses to finetune intonation and rhythm of the generated output?

  • 2. How can I combine speed and pauses tags to make the important information stand out?

  • 3. How can I use alternative selection tags to finetune the default output according to my expectations?

  • 4. How can I make sure I am using the right format (for hours, date, etc.)?

  • 5. How can I use the pronunciation editor to create a specific entry of a word such as a proper name?

  • 6. How can I use alternative transcriptions – allophone- for full satisfaction?