Call Center TTS
17languages
Human expertise · Global projects
Language. Data. Audio.Managed end to end.
Translation, AI data annotation and voice projects in 20+ languages. We recruit the right people, coordinate the work and review agreed outputs, from your first brief to delivery.
Explore our services
Choose a service to explore tasks, example outputs and project requirements.
Data Annotation
Turn content into structured AI training data. Our teams annotate sentiment and intent, tag products and content, and support preference annotation, RLHF and model evaluation using agreed guidelines.
What we can help with
- Sentiment & intent
- RLHF & evaluation
- Content tagging
When to choose this service
Preparing labeled training data, evaluating model responses or collecting human preferences for your AI workflow.
What you receive
Labels, preference judgments or evaluation records in the agreed structure, such as a spreadsheet or JSON file where appropriate, with task guidelines and review notes.
Translation & localization
Preserve meaning across languages and markets. We translate documents and content, localize legal, technical, marketing and business material, and support interpretation needs.
What we can help with
- Document & content translation
- Localization
- Interpretation
When to choose this service
Adapting documents, websites, products or campaigns for new audiences, or supporting multilingual communication.
What you receive
Translated or localized documents, website copy or other agreed content, with terminology review. File formats and any interpretation arrangements are defined for the project.
Voice & audio production
We recruit native voice talent and manage voice-over, narration, film and video dubbing, recording and audio engineering around your brief.
What we can help with
- Voice-over & narration
- Dubbing
- Recording & audio engineering
When to choose this service
Producing narration for videos and learning content, localizing media or creating voice content for your audience.
What you receive
Voice recordings and edited audio for the agreed script, with file naming and production specifications. Dubbing and audio engineering outputs are scoped to your content.
ASR & STT project services
We manage the full ASR and STT project lifecycle: planning, speaker recruitment, recording, transcription, segmentation, speaker labeling, quality assurance and delivery. Speech data is collected and prepared for your project, guided by your scope, languages and quality requirements.
What we can help with
- Speaker recruitment
- Recording & transcription
- Segmentation & labeling
When to choose this service
Training or improving speech recognition, voice interfaces and multilingual transcription systems.
What you receive
Recordings, transcripts, timestamped segments and speaker labels as scoped, plus review records. File structure, naming and formats are agreed with your team.
Illustrative workflow
Speech audio sample
EnglishSample audio
WAV
ASR / STT transcription
NATIVE-LANGUAGE TRANSCRIPT
“Every good dataset opens up a new possibility.”
Human-reviewed speech data
Reviewed against project criteria
SAMPLEREVIEW
AV_001Reviewed
AV_002Reviewed
AV_003Reviewed
TTS project services
We manage the full TTS project lifecycle: planning, voice talent recruitment, scripted recording, audio preparation, quality assurance and delivery. Recordings are created for your project and reviewed against your pronunciation, speaking style and audio specifications.
What we can help with
- Voice talent recruitment
- Scripted recording
- Audio quality review
When to choose this service
Producing custom recordings to support speech synthesis in the language, pronunciation and speaking style your project requires.
What you receive
Project recordings with matching scripts and review records. Voice direction, audio specifications, file naming and delivery formats are defined in the brief.
Speech data validation
Bring a native ear to the details. We review audio and transcripts, check pronunciation and apply agreed quality criteria before your speech data moves into the next stage.
What we can help with
- Audio & transcript review
- Pronunciation checks
- Quality assurance
When to choose this service
Reviewing client-provided or project-collected speech data and model output against agreed criteria, or resolving quality issues before the next stage.
What you receive
Reviewed audio or transcripts, corrections and an issue log, as scoped. Findings reference the quality criteria agreed with your team.
Our Customers
Project experience
Multilingual projects. Managed by people.
Experience in call center TTS, code-switching and multilingual transcription.
Code-switching
Multilingual transcription
Our responsibilities
- Recruitment
- Training
- Project management
- Quality assurance
- Studio logistics
- Content review
+The AvantLingua approach
Expertise in the details.
Quality in the work.
Meaning, pronunciation and context need human judgment. Our specialists apply your terminology and task guidelines, with review focused on the details that matter to your project.
Native expertise
Specialists understand how people speak and write, including phrasing, pronunciation and cultural context.
Clear review criteria
Terminology, examples and acceptance criteria give reviewers a shared reference for each task.
Useful review records
Review notes identify issues and corrections against the agreed criteria, so your team can assess the work.
+Meet AvantLingua
Language expertise,
built through practice.
Our language expertise began in 2015. AvantLingua now brings native specialists, project coordination and quality review to translation, AI data and audio work in 20+ languages.
2015Our language expertise began
20+Languages supported
End to endProject planning through delivery
Global language coverage
Your languages. A defined scope.
Tell us which languages and dialects your project needs. Our coverage spans 20+ languages across Asia, Europe, the Americas and Africa.
Service availability depends on the language, task and project. Website display languages are separate from project language coverage.
Check your language requirements- Asia
- Europe
- The Americas
- Africa
+Our self-hosted platform
Your data workflow.
A controlled environment.
Our self-hosted platform brings data tasks and review into one project environment. We agree the deployment model, data handling and review process with your team before work begins.
Discuss your security requirementsProject workspaceIllustrative workflow
01Prepare
02Work
03Review
Available: a self-hosted project platform
Deployment, access and data handling requirements are reviewed for each project. Ask us to walk through the setup relevant to your brief.
Requirements to agree before work begins
Access requirements
Define who can access each project and what they can do.
Data lifecycle
Agree storage location, retention periods and deletion at handover.
Review & traceability
Specify review records and audit evidence needed for the project.
Security & privacy reference frameworks
Reference frameworks for discussing project requirements. These are not claims of certification; certification and independent audit status must be verified separately.
+Working together
A clear working plan.
From brief to handover.
01
Define the brief
Share the task, target languages, volume and deadline. Together, we define the work and the inputs needed.
02
Agree the working plan
Set task guidelines, examples, acceptance criteria and delivery formats before production begins.
03
Coordinate production
We recruit the required language specialists or voice talent, assign work and manage schedules, questions and feedback.
04
Review and hand over
Receive the agreed files and review records, with questions and corrections handled through the project's acceptance process.
+A few useful answers
Before we begin.
Which services does AvantLingua provide?
Our services include translation and localization, Data Annotation, managed ASR, STT and TTS projects, speech data validation, and voice and audio production. Select a service above to explore its scope.
Can one project combine several services?
Yes. A project may combine translation, annotation, recording and review. Share the full brief so we can agree on responsibilities, dependencies and a coordinated delivery plan.
How do you review quality?
We agree on the task guidelines, examples and review criteria before work begins. Specialists review the output against these requirements and flag questions or issues for clarification and correction.
What do you need to scope a project?
Start with your goals, the service you need, languages, expected volume, output format and preferred deadline. Examples or existing guidelines help us understand the work and propose an appropriate scope.
Which languages and project sizes can you support?
We support more than 20 languages across Asia, Europe, the Americas and Africa. We can discuss a defined project or ongoing work; availability and delivery plans depend on the language, task and volume.
Can you manage the full speech data project?
Yes. We provide full-cycle ASR, STT and TTS project services, from planning and talent recruitment through recording, data preparation, annotation, quality assurance and delivery, as required by your brief. We do not have ready-made datasets available; speech data is collected and prepared specifically for your project.
Let’s work together
Start with your brief.
Define the work together.
Tell us what you need to translate, annotate, record or review. We will clarify the scope and delivery requirements with you.
contact@avantlingua.com