Spanish speech dataset, roughly 500 hours ready to license
Our OTS Spanish speech dataset is roughly 500 hours of Spanish speech, prompts and conversations, already recorded by Spanish speakers in our 30,000+ network, with consent from every speaker for commercial AI training. License it now and train your Spanish speech recognition model without waiting on a new collection.
- ~500 h of Spanish in stock
- ~35,000 h across the OTS pool
- 100% of speakers consented
- ISO 27001 certified
- SOC 2 report under NDA
- GDPR DPAs and HIPAA BAAs on request
What's in the Spanish speech dataset?
The IndecalAI OTS Spanish speech dataset is roughly 500 hours of Spanish speech, prompts and conversations, recorded by Spanish speakers in our network who all consented to commercial AI training. It's already recorded, so you can license it now instead of waiting on a new collection.
Spanish is one of the most spoken languages in the world and the second language of the US market, which makes it the first language after English on many voice product roadmaps. It's spoken across more than twenty countries, so the accent mix matters as much as the hours.
Every recording comes with a transcript and metadata about the speaker, the device and the setting, and you can take it as WAV, OGG or another common format. Every order starts with sample clips and a spec sheet, so you can match the data against your model before you agree a licence.
Need more than what's in stock? Spanish speakers from our 30,000+ network record new speech to your brief, and our Spanish data page covers what we collect to order.
Spanish speech dataset at a glance
- Hours
- Roughly 500 hours, already recorded
- Language
- Spanish (Español), es
- Content
- Speech, prompts and conversations
- Consent
- Every speaker consented to commercial AI training
- Speakers
- Spanish speakers from our 30,000+ network
- Audio and transcripts
- Transcripts and metadata with every recording, in WAV, OGG and more
- Licence
- Terms agreed with each customer, in writing
- Price
- Quoted per order
- Samples
- Spanish sample clips sent in reply to your request
- Security
- ISO 27001 certified. SOC 2 report available under NDA. GDPR DPAs and HIPAA BAAs on request.
What comes with every Spanish recording
Recorded on the devices and in the places your users actually speak, and delivered in the format your pipeline expects.
| Detail | In the Spanish dataset |
|---|---|
| Speech types | A mix of scripted prompts and natural conversations |
| Recording devices | Mobile phones, laptops and studio microphones |
| Environments | Quiet rooms and noisy, everyday settings |
| Transcripts | Included with every recording |
| Speaker metadata | Speaker details, such as gender and age, for each recording |
| Recording metadata | The device and the setting for each recording |
| Audio formats | WAV, OGG and other common formats |
| Sample rates | Listed for each recording on the spec sheet |
What roughly 500 hours of Spanish speech looks like
Put end to end, 500 hours of Spanish speech would play for about three weeks, day and night. Nobody listens to all of that before buying, so every order starts with sample clips and a spec sheet instead.
- ~500 hours of Spanish speech
- ~30,000 minutes
- ~1.8M seconds of audio
- ~21 days, played back to back
Hours here are recorded audio. When you compare quotes, check whether each one counts audio hours or only the parts where someone is talking.
Spanish at a glance, for speech teams
The facts that shape a Spanish speech project, from who speaks it to how it's written. Our Spanish data page covers what we collect to order.
Speakers
~561 million
people speak Spanish as a first or second language, about 487 million of them natively (Ethnologue, 2026).
Where it's spoken
Spain and the Americas
Official in Spain and most of Latin America, and spoken by tens of millions of people in the US.
Script
Latin alphabet
Written left to right, with accents and ñ. Spelling follows sound closely.
Family
Romance
A Romance language, close to Portuguese, Catalan and Italian.
Varieties
Many regional accents
Spanish from Mexico, Spain, Argentina, Colombia or the Caribbean differs in sounds, words and the forms of you.
Codes
es · spa
ISO 639-1 and ISO 639-3 codes. Locales speech APIs often use: es-ES, es-MX, es-US.
Spanish speech dataset, voice dataset or speech corpus?
The same Spanish data goes by several names, depending on who's asking. Here's what each name usually means.
Spanish speech dataset
The general term
Recorded Spanish speech with details about each recording, for training and testing speech models. The name this page uses.
Spanish voice dataset
Usually the same thing
Some teams mean voice for text-to-speech or speaker recognition, which needs cleaner audio. Part of our data was recorded in a studio, so ask for those recordings.
Spanish audio dataset
A wider term
It can include music or background sound. Ours is speech audio: Spanish speech, prompts and conversations.
Spanish speech corpus
The research name
A structured collection of recordings and their details. Commercial datasets are corpora too, licensed instead of published.
Spanish ASR or speech-to-text dataset
Speech plus what was said
For training a model that turns Spanish audio into text. Every recording in our Spanish dataset comes with a transcript.
Spanglish speech data
Spanish with English mixed in
The way many US Spanish speakers talk. Ask how much mixed speech is in the hours you license.
What makes Spanish hard for speech recognition
These are the things a Spanish speech model trips on, and what to listen for in any Spanish sample, ours included.
English words inside Spanish sentences
Spanish speakers in the US often mix in English words and phrases, sometimes called Spanglish. A model trained only on formal Spanish stumbles on that, so listen for how much mixing is in a sample.
Accents in the transcript
Accent marks change meaning in Spanish, like si (if) and sí (yes), but people often skip them when they type. Check that the transcripts keep the accents your model should output.
Accents across the Spanish-speaking world
Mexican, Caribbean, Andean, Argentine and Peninsular Spanish carry different sounds and words. Check that the speaker mix covers the regions your users come from.
Sounds dropped in fast speech
In many regions speakers soften or drop the s at the end of a syllable, so the audio sounds shorter than the spelling. The model has to learn to write the full word.
What teams build with a Spanish speech dataset
Common uses for Spanish speech that's already recorded. They show the kind of work, and they aren't client names.
Spanish speech recognition
Train or fine-tune a Spanish speech-to-text model, or adapt a multilingual model so it handles Spanish well.
Voice bots and IVR
Teach a voice bot how Spanish callers actually ask for things, in the words and accents they use.
Customer service calls
Spanish speech for models that route, transcribe or summarize customer calls about accounts, orders and claims.
Voice in the car and at home
A Spanish base for in-car assistants and smart devices, before recording commands in the real setting.
Support and speech analytics
Spanish conversations for models that find intent, sentiment or topics in support calls and chats.
Testing a Spanish model
Held-back Spanish recordings your model never trained on, to measure word and character error rate before launch.
How many hours of Spanish speech do you need?
It depends on the model you start from and how close your users sound to the training data. These are rough starting points that come up often in speech work. Your own tests should decide.
| Goal | Rough starting point | With our Spanish data |
|---|---|---|
| Test a model you already have | A few hours your model never trained on | A test set cut from stock and kept out of training |
| Fine-tune a multilingual model, such as Whisper or wav2vec 2.0 | Tens to a few hundred hours | Roughly 500 hours in stock covers it |
| Adapt to one domain, like banking calls | A smaller set that sounds like your users | Stock as a base, plus a custom top-up in your domain |
| Train a Spanish model from scratch | Thousands of hours | Stock as a base, plus a larger custom collection |
Free Spanish speech datasets or a licensed one?
Public corpora such as Mozilla Common Voice, Multilingual LibriSpeech and FLEURS have done a lot for Spanish speech research. They cover what their creators chose to record, like read sentences, crowd recordings or broadcast speech, and each comes with its own licence and terms of use. Here's how they compare with a licensed dataset.
| Topic | Public Spanish corpora | Our Spanish speech dataset |
|---|---|---|
| Licence | Set by each corpus, and some limit redistribution or changes | Agreed with you in writing, for what you're building |
| Consent | Covered by each project's own terms | Every speaker consented to commercial AI training |
| What it sounds like | Whatever the project recorded | Speech, prompts and conversations, with sample clips first |
| Who else trains on it | Anyone who downloads it | Set in the licence we agree with you |
| Filling gaps | Up to you | Recorded to your brief by the same network |
| Support | Community forums | A named contact from sample to delivery |
How to check a Spanish speech sample
Thirty minutes with the sample clips and the spec sheet tells you most of what you need. Use the same list on any vendor.
| Check | What to look for | Where to find it |
|---|---|---|
| Accents | Speakers from the regions your users come from | The speaker mix on the spec sheet, and the clips |
| Everyday speech | The way your users really talk, including any mixing with other languages | Listen to the clips |
| Script | Transcripts in the script and spelling your model should output | The transcript format on the spec sheet |
| Audio | A sample rate and recording setup close to your product | The sample rate on the spec sheet |
| Numbers | Amounts, dates and phone numbers written one consistent way | Transcripts of the clips |
| Rights | Consent that covers commercial AI training, and a licence that fits | Ask for the licence terms before you buy |
From Spanish sample clips to licensed data
Your named contact runs it from the first question to delivery.
-
01
Ask
Tell us how many Spanish hours you need and what the model is for.
You get A reply within one business day
-
02
Sample and spec sheet
We send Spanish sample clips and the spec sheet in reply.
You get Spanish clips and the spec sheet
-
03
Licence and quote
We agree the licence terms and send a quote for the order.
You get Written licence terms and a quote
-
04
Delivery
The licensed Spanish speech is delivered to you.
You get Licensed Spanish speech with transcripts
-
05
Fill the gaps
Accents, devices or domains that are missing get recorded to your brief.
You get New Spanish speech, recorded to your brief
Get Spanish sample clips Start with the sample clips, then decide.
Spanish speech data terms
The words that come up when you buy or build Spanish speech data. The full glossary covers every data type.
- Seseo
- Saying the letters c and z like s, as most Latin American speakers do. In much of Spain they sound like the th in thin.
- Voseo
- Using vos instead of tú for you, with its own verb forms, common in Argentina and parts of Central America.
- Spanglish
- Spanish mixed with English words or phrases in the same conversation, common among Spanish speakers in the US.
- Speaker metadata
- Details recorded about each speaker, such as gender and age, that let you check the speaker mix against your users.
- OTS dataset
- Short for off-the-shelf dataset: data already collected and ready to license before a buyer asks for it, instead of recorded to one buyer's brief.
- Word error rate (WER)
- The share of words a speech model gets wrong against a reference transcript. Lower is better.
- Character error rate (CER)
- The same idea counted in characters, often used alongside WER, since small spelling differences can make WER look worse than the model is.
- Utterance
- One stretch of speech by one speaker, such as a single prompt read aloud or one turn in a conversation.
More Spanish and speech data
Every language in stock is on the off-the-shelf speech datasets page. Related speech datasets: Portuguese, Catalan, Italian and French.
OTS speech datasets
Around 35,000 hours across languages, ready to license.
Spanish data to your brief
Spanish speech, text and translation, collected to order.
Transcription
Spanish audio turned into timed text, checked by people.
Languages
100 languages, collected to order.
Data and model evaluation
Held-back Spanish speech scored against your targets.
Questions about the Spanish speech dataset
Straight answers about licensing Spanish speech. The off-the-shelf FAQ covers questions that apply to every language.
Do you have a Spanish speech dataset ready to license?
Yes. Roughly 500 hours of Spanish speech, prompts and conversations are already recorded and ready to license, as part of our off-the-shelf speech pool.
What's in the Spanish speech dataset?
A mix of scripted prompts and natural conversations in Spanish, recorded on mobile phones, laptops and studio microphones, in quiet and noisy settings. Every recording comes with a transcript and metadata about the speaker, the device and the setting, in WAV, OGG or another common format.
Does it include Spanish-English mixed speech?
Spanish speakers, especially in the US, often mix in English words, so ask how much mixed speech is in the hours you'd license. The sample clips let you hear it for yourself before you commit.
Did every speaker consent to AI training?
Yes. Every speaker gave consent for their recordings to be used for commercial AI training.
How is the Spanish dataset licensed?
Licence terms are agreed with each customer, in writing, before delivery. That includes how you can use the data and whether anyone else can license the same recordings.
How much does the Spanish speech dataset cost?
We quote each order on its own, based on the hours you need and the licence terms. Send your request and your named contact comes back with a quote.
Can we hear Spanish samples first?
Yes. Ask and we send Spanish sample clips with the spec sheet, so you can check the audio before you commit.
What if we need more than 500 hours, or a specific accent?
We collect it. Spanish speakers from our network record new speech to your brief, such as a region, an age group, a device or a domain, and it can sit alongside the hours you license from stock.
Is this the same as a Spanish voice dataset or speech corpus?
For most uses, yes. Speech dataset, voice dataset, audio dataset and speech corpus are names for the same thing: recorded Spanish speech with details about each recording. If you need studio-quality voice for text-to-speech, ask for the recordings made in a studio.
Can we use it as a Spanish speech-to-text (ASR) dataset?
Yes. Every recording comes with a transcript, so it's ready for training and testing Spanish speech-to-text models. The spec sheet shows the transcript style, so you can check it matches your pipeline before you license it.
Why not use a free Spanish speech dataset?
Public Spanish corpora are a good start for research. Each one has its own licence and terms of use, and they cover what their creators chose to record, such as read sentences or broadcast speech. Read the licence before you train a commercial model on one, and check that it sounds like your users.
What does OTS mean?
OTS stands for off-the-shelf: data that's already recorded and ready to license, instead of collected after you order. Our OTS Spanish speech dataset is roughly 500 hours.
How many hours of Spanish speech do we need?
It depends on your starting model. A test set can be a few hours, fine-tuning a multilingual model often starts at tens to a few hundred hours, and training from scratch takes thousands. Your own tests should decide.
Can we fine-tune Whisper or wav2vec 2.0 on it?
Yes. Teams commonly fine-tune open speech models like these on licensed Spanish speech, and every recording comes with a transcript in WAV, OGG or another common format. The spec sheet shows the transcript style, so you can plan any conversion before you train.
Do you work with US teams?
Yes. We take calls in US Eastern mornings, which is evening in India. We're ISO 27001 certified, our SOC 2 report is available under NDA, and we sign GDPR data processing agreements and HIPAA business associate agreements on request.
Get Spanish sample clips
Say roughly how many Spanish hours you need and what the model is for. We'll send sample clips and the spec sheet.
- Your named contact replies within one business day.
- We send Spanish sample clips and the spec sheet.
- We agree the licence terms and send a quote.
This opens your email app with the request filled in. Nothing is sent until you press send. You can also use the contact page.