LICENSE

# Tontaube Community Model License 1.0

Effective date: 26 August 2026

## In short

*This summary is not part of the Agreement and does not change it.*

- **Research and noncommercial use is free**, without a revenue limit, subject
  to the service and use restrictions below.
- **Commercial use is free** while your group's revenue is **below EUR 200,000**.
  At or above that amount, a separate commercial license is required after any
  transition period under Section 4 — see <https://tontaube.ai/licensing/>.
- **Testing is always free**, at any size, as long as it is not production.
- **Offering the model to others as a speech-generation service** always needs a
  commercial license, whatever your revenue. A small free demo is fine. Using it
  inside your own product is different — the revenue rule above applies as normal.
- **You may build on it, fine-tune it, and distill it.** If you distribute the
  resulting weights, they carry this same license.
- **Community commercial use requires attribution:** put "Powered by TontaubeV1"
  somewhere reasonable — a credits line or a docs page is enough.

---

This Tontaube Community Model License 1.0 (the **Agreement**) is offered by
Cremer & Cremer Technologies UG (haftungsbeschränkt), with registered office
in Berlin, Germany, registered with the Commercial Register of Amtsgericht
Charlottenburg under HRB 272354 B (**Licensor**), to the individual or legal
entity exercising rights under this Agreement (**You** or **Licensee**).
Tontaube is a brand of the Licensor and a registered European Union trade mark
(EUTM no. 019205218). The Licensor's current legal notice, business address, and
contact details are available at <https://tontaube.ai/impressum/>. You accept
this Agreement by affirmatively indicating acceptance or by exercising any right
granted only under this Agreement. Mere access to or receipt of Model Materials,
without exercising a licensed right, does not by itself constitute acceptance. If
You act for an organization, You represent that You have authority to bind it.

## 1. Scope and definitions

**Covered Files Manifest** means the manifest supplied with a release that
identifies by file name or path, and where practicable by checksum, the files
that Licensor designates as subject to this Agreement. If a release is published
without a manifest, or if a copy You receive does not include one, Model
Materials means all model weight and checkpoint files published by Licensor in
that release.

**Model Materials** means only the TontaubeV1 trained model weights,
checkpoints, model-specific configuration files, and other model artifacts
identified in the Covered Files Manifest, including the four TontaubeV1
codebook checkpoints. This Agreement grants rights only to the extent those
rights are owned by or licensable by Licensor.

Model Materials do **not** include inference source code, the TontaubeV1
verbalization checkpoint (separately licensed under the Apache License 2.0), or
any third-party software, models, weights, tokenizers, codecs, documentation, or
other components, including Qwen3, DualCodec, VibeVoice, or w2v-BERT 2.0
components. Those materials remain subject to their respective licenses. If an
artifact contains both Licensor-owned and third-party material, this Agreement
applies only to Licensor's rights, and all applicable third-party terms continue
to apply.

**Derivative Model** means any model, model weights, adapter, checkpoint, or
other model artifact derived directly or indirectly from, incorporating, or
modifying or adapting the Model Materials or another Derivative Model,
including a fine-tune, LoRA or other adapter, merge, pruned or quantized
version, or converted checkpoint. Outputs are not Derivative Models. For the
purposes of the conditions in this Agreement only, a model that generates speech
and was trained, fine-tuned, distilled, or otherwise improved using Outputs is
treated as a Derivative Model, whether or not it constitutes a derivative work
under applicable law. This classification does not give Licensor ownership of
that model or grant rights in contributions not owned by or licensable by
Licensor.

**Output** means audio or other content generated through use of the Model
Materials or a Derivative Model.

**Affiliate** means an entity that directly or indirectly controls, is
controlled by, or is under common control with Licensee. **Control** means
direct or indirect ownership of more than 50 percent of the voting interests
or the legal power to direct an entity's management and policies. Entities
controlled by the same natural person or persons are under common control with
one another.

**Consolidated Gross Revenue** means the gross revenue of Licensee and all
Affiliates, from all sources, for the most recently completed fiscal year, or
for the trailing twelve months if that amount is greater, calculated on a
consolidated basis under the accounting principles used in their ordinary
financial records. Intercompany amounts are counted only once. VAT, sales and
similar transaction taxes collected for a government, and customer refunds, are
excluded. Where Licensee is a natural person, only business and self-employment
turnover is counted; income from employment is excluded. Where Licensee does not
measure revenue, including a public body, foundation, or nonprofit organization,
total annual budget or expenditure applies instead. Revenue denominated in
another currency must be converted to euros using the European Central Bank
reference rate, or the nearest reasonably available equivalent, on the last day
of the relevant period.

**Commercial Use** means use primarily intended for commercial advantage,
business benefit, or monetary compensation. It includes offering a hosted
service or API, client or contract work, use in a product or service,
distribution in connection with a business, and use in internal business
operations, whether or not the Model Materials are separately priced. Evaluation
under Section 2a is not Commercial Use.

**Research and Noncommercial Use** means personal, educational, evaluation,
academic, or scientific use that is not primarily intended for commercial
advantage, business benefit, or monetary compensation. Research intended for
deployment in a commercial product, service, client engagement, or internal
business operation is Commercial Use, subject to Section 2a.

**Speech Generation Service** means providing third parties with hosted or
remote access to speech-generation functionality powered by the Model Materials
or a Derivative Model, where generating speech is itself the product, service, or
a separately offered functionality, whether or not for a fee. Using the Model
Materials or a Derivative Model locally, or on infrastructure operated solely for
You or on Your behalf without providing third parties access to that
functionality, is not a Speech Generation Service. Nor is using them solely as an
internal component of a product or service whose primary functionality is not
speech generation and that does not provide speech generation as a standalone,
API-accessible, or separately offered feature.

## 2. Research and noncommercial license

Subject to this Agreement, Licensor grants You a worldwide, non-exclusive,
non-transferable, non-sublicensable, royalty-free license, under
intellectual-property rights owned or licensable by Licensor, to use, reproduce,
host, modify, fine-tune, quantize, convert, create Derivative Models from, and
redistribute the Model Materials and Derivative Models for Research and
Noncommercial Use.

This Section 2 is not conditioned on Licensee's revenue.

## 2a. Evaluation

Subject to this Agreement, Licensor grants You the rights stated in Section 2,
other than the right to redistribute the Model Materials or Derivative Models,
solely for testing and evaluating them, regardless of Consolidated Gross Revenue
and regardless of whether You intend eventual Commercial Use. This grant is not
limited in time and requires no registration.

This grant does not extend to production use. Production use means serving real
users, producing Output used in a product or service, or supporting live
business operations, whether internal or external.

## 3. Community commercial license

Subject to this Agreement, Licensor grants You, for Commercial Use, the rights
stated in Section 2, for so long as Consolidated Gross Revenue is less than
EUR 200,000.

The threshold applies to Licensee and its Affiliates in aggregate and to their
revenue from all sources, whether or not that revenue was generated using the
Model Materials. Investment proceeds are not revenue unless they are treated
as revenue in Licensee's ordinary financial records.

The license granted to You does not independently license an Affiliate. You
may permit Your personnel, contractors, and cloud or other service providers
to exercise Your rights solely on Your behalf, for Your benefit, and within
the scope of Your license, provided they receive no independent rights in the
Model Materials, are bound by written terms that protect the Model Materials,
and comply with this Agreement. You are responsible for their acts and
omissions relating to the Model Materials as if they were Your own. An
Affiliate must independently accept and comply with this Agreement unless it
acts solely as such a service provider on Your behalf.

Where You perform work for a client and provide only completed Outputs, Your
Consolidated Gross Revenue alone determines Your eligibility under this Section.
The client need not accept this Agreement solely to receive or use those
Outputs, except for model-training use under Section 7. Providing completed
Outputs under this paragraph is not, by itself, a Speech Generation Service.

This paragraph does not authorize providing the client with Model Materials or
a Derivative Model, operating a Speech Generation Service, or entering into an
arrangement structured principally to give the client the functional equivalent
of such access or to avoid this Agreement's commercial-license requirements. A
client that receives Model Materials or a Derivative Model is a recipient under
Section 5 and must independently accept and comply with this Agreement.

## 3a. Speech Generation Services and public demonstrations

No license granted under this Agreement permits You to operate a Speech
Generation Service, other than a Public Demonstration. Operating a Speech
Generation Service requires a separate written commercial license, regardless of
Consolidated Gross Revenue and whether the service is offered for a fee. For a
separate commercial license, see <https://tontaube.ai/licensing/>.

A **Public Demonstration** means a free, non-production interface made available
solely to allow users to evaluate the Model Materials or a Derivative Model. It
must provide no API or automated access, no service-level commitment, no
integration into another product, service, or workflow, and no bulk use, and must
impose reasonable per-user rate and output limits.

## 4. Crossing the commercial threshold

If Consolidated Gross Revenue reaches or exceeds EUR 200,000, Section 3 does not
authorize You to make Commercial Use of the Model Materials or a Derivative
Model, except as provided in this Section. If it first reaches or exceeds that
amount while You are making authorized Commercial Use, Your permission for that
Commercial Use continues until 30 days after the end of the calendar month in
which the threshold was first reached or exceeded. Any Commercial Use after
that requires a separate written commercial license that has become effective.
For a separate commercial license, see <https://tontaube.ai/licensing/> or
contact <mailto:contact@craitech.io>.

If Consolidated Gross Revenue later falls below EUR 200,000, Section 3
authorizes Your Commercial Use again, without further action by either party.

Your rights for Research and Noncommercial Use under Section 2 and for
evaluation under Section 2a continue, provided You comply with this Agreement.
Crossing the threshold is not itself a breach, does not require deletion of the
Model Materials or Derivative Models, and does not affect compliant rights
previously granted to downstream recipients.

Products, copies, or units that You distributed while authorized remain licensed
and need not be recalled, withdrawn, or disabled. Further distribution in the
course of Commercial Use after Your permission under Section 3 ends requires a
separate written commercial license.

Licensor and Licensee are not bound by a separate commercial license unless
they enter into one in writing. Nothing in this Agreement obliges either party
to agree to separate commercial terms.

Licensor may, on reasonable written request and no more than once in any
12-month period, ask You to confirm in writing whether Your Consolidated Gross
Revenue has reached or exceeded the threshold. This is not an audit right and
requires no disclosure of figures.

## 5. Redistribution and notices

You may redistribute the Model Materials or a Derivative Model only if You:

1. include a copy of this Agreement, or a clear and prominent reference to it
   identifying it by name and giving its URL;
2. include the Covered Files Manifest You received, where one was supplied;
3. preserve all copyright, license, and attribution notices supplied with the
   Model Materials, including the required notice below;
4. clearly identify any modifications You made; and
5. do not state or imply that Licensor endorses Your modification, product, or
   service.

Required notice:

> TontaubeV1 Model Materials. Copyright © 2026 Cremer & Cremer Technologies
> UG (haftungsbeschränkt). Licensed under the Tontaube Community Model License
> 1.0.

A person who receives Model Materials without a Covered Files Manifest still
holds a license under this Agreement, and the fallback in Section 1 determines
its scope.

**Products containing the Model Materials.** Where the Model Materials or a
Derivative Model are embedded in a product supplied to end users, such as an
application, a game, or a device, an end user who acquires that product is not a
recipient for the purposes of this Section, and no notice is owed to them under
it. Attribution under Section 5a is Your obligation as the supplier, not theirs.
Where You supplied those units or copies while
licensed under this Agreement, they are licensed for their purchaser's use of the
model as embodied in the product, permanently, and independently of whether Your
own license later ends. Their purchaser requires no license under this Agreement
for that use, and a purchaser who acquired the product in the ordinary course of
business may rely on this unless it knew that You were not licensed.

This paragraph does not apply where generating speech is the principal function of
the product, or where an arrangement is structured principally to avoid the
requirement for a commercial license. In those cases the purchaser requires its
own license.

Each recipient receives rights directly from Licensor under this Agreement
only with respect to rights owned by or licensable by Licensor in the Model
Materials and must independently satisfy its conditions, including the
commercial revenue threshold. You must separately grant any rights needed for
Your own contributions to a Derivative Model; Licensor does not license those
contributions on Your behalf. You may impose terms on Your own contributions,
products, or services, but may not represent that those terms replace or
reduce a recipient's obligations under this Agreement for the Model Materials.

Providing only Outputs does not distribute Model Materials or a
Derivative Model. Except where a recipient affirmatively accepts this Agreement
for model-training use under Section 7, a person who receives only Outputs need
not accept this Agreement.

## 5a. Attribution

Where You make Commercial Use of the Model Materials or a Derivative Model under
Section 3, You must state that fact using the wording "Powered by TontaubeV1".
The statement may appear in product documentation, an about or credits screen, a
service website, or any comparable place where a user or reader would reasonably
find it. No particular placement, prominence, or prior approval is required, and
where a product offers no such place, no statement is required.

This Section does not apply to Commercial Use authorized by a separate written
commercial license, unless that license provides otherwise. It does not apply to
a person who acquires and uses a product containing the Model Materials without
themselves redistributing them; attribution for such a product is the obligation
of the party that supplied it.

Where You distribute a Derivative Model, You must state in its documentation or
model card that it was derived from or trained using TontaubeV1.

Licensor grants You a limited, non-exclusive, royalty-free license to use the "Tontaube" and
"TontaubeV1" word marks solely to make the statements required by this Section,
in unmodified form and without implying endorsement. This license lasts for as
long as those statements are required of You and You comply with them. You must not
use "Tontaube" in the name of a Derivative Model, product, or service, or as
branding of Your own, without Licensor's prior written permission. Nothing in
this Section restricts use of the marks that applicable law permits without a
license, such as referring to the Model Materials to describe their origin or
Your product's compatibility.

## 6. Outputs

Licensor claims no ownership in an Output solely because it was generated
using the Model Materials, to the extent permitted by applicable law. This
Agreement does not determine whether an Output is protected by intellectual-
property rights, who may own such rights, or whether an Output is lawful or
non-infringing, and it grants no rights in third-party material contained in an
Output. Licensee is responsible for Outputs and their use, including obtaining
permissions and complying with rights of speakers and other third parties.

Outputs generated in compliance with this Agreement while Licensee was
authorized remain usable, subject to applicable law and third-party rights,
after Licensee reaches or exceeds the commercial threshold or this Agreement
terminates.
No provision of this Agreement requires deletion of those Outputs. The
obligations in Section 7 governing the use or supply of Outputs for model
training continue to apply.

## 7. Use conditions

You must use the Model Materials, Derivative Models, and Outputs in compliance
with applicable law, including export control and sanctions law, and must not
knowingly infringe or facilitate infringement of another person's privacy,
publicity, personality, copyright, trademark, or other rights.

You must not knowingly use the Model Materials or a Derivative Model, or
knowingly provide a service designed to enable others to use them, to:

1. commit or materially facilitate fraud; or
2. imitate an identifiable natural person's voice without that person's
   authorization in a manner reasonably likely to cause a listener to believe
   that synthetic speech is an authentic statement by that person.

The second restriction does not prohibit authorized performances or lawful
parody, satire, commentary, journalism, or public-interest research that is
not reasonably likely to deceive a listener about the speech's authenticity.

**Models trained on the Model Materials or Outputs.** Subject to the scope and
eligibility requirements of the applicable license under Section 2, 2a, or 3, You
may use the Model Materials, a Derivative Model, or Outputs to train, fine-tune,
distill, or otherwise improve another model, and You may publish papers,
evaluation results, samples, and other findings arising from that work. If You distribute or
otherwise make available the weights, checkpoints, or adapters of a model so
trained, and that model generates speech, You must distribute it under this
Agreement and state in its documentation or model card that it was trained using
TontaubeV1 Model Materials or Outputs.

You must not knowingly provide or make Outputs available as training data,
including in bulk or as a dataset, or otherwise for the stated or reasonably
apparent purpose of training, fine-tuning, distilling, or improving a
speech-generation, voice-conversion, or dubbing model, unless, before receiving
them, the recipient affirmatively accepts this Agreement for that training use or
enters into a separate written agreement with Licensor authorizing that use. This
obligation applies to You as the supplier of the Outputs. It does not restrict
ordinary publication, distribution, receipt, or listening where the Outputs are
not supplied for model-training purposes.

This requirement does not apply to a model whose function is speech enhancement,
denoising, or restoration, or to any purpose that does not produce generated
speech, including automatic speech recognition, diarization, speaker
recognition, audio classification, benchmarking, and evaluation. If You
distribute or otherwise make available the weights, checkpoints, or adapters of
such a model, the statement of origin described above is required, but this
Agreement does not require You to license that model under this Agreement. Voice
conversion and dubbing models are subject to the requirement.

These use conditions are part of this fixed version of the Agreement. No
separately published or later-modified acceptable-use policy is incorporated
by reference.

## 8. Ownership, patents, and trademarks

Licensor and its licensors retain their respective rights in the Model
Materials. You retain whatever rights You may have in Your original
contributions to a modification or Derivative Model, subject to the underlying
Model Materials and applicable third-party rights. This Agreement does not
determine ownership of a modification or Derivative Model as a whole.

Subject to this Agreement, Licensor grants You a worldwide, non-exclusive,
royalty-free, irrevocable patent license, under patent claims owned or
licensable by Licensor that are necessarily infringed by the Model Materials as
distributed by Licensor, to make, use, offer to sell, sell, import, and
otherwise transfer the Model Materials. This license does not extend to Your
modifications or to any combination of the Model Materials with other material.
If You initiate patent litigation against any entity alleging that the Model
Materials or a Derivative Model constitutes patent infringement, the patent
license granted to You under this Section terminates on the date the litigation
is filed.

Except as stated in Section 5a, no trademark, trade-name, logo, or branding
rights are granted.

## 9. No warranty

Under this Agreement, the Model Materials are provided free of charge and
**as is**, without any guarantee of availability, accuracy, fitness for a
particular purpose, or non-infringement, to the maximum extent permitted by
applicable law. A separate written agreement signed by Licensor may expressly
provide different warranties or support. You are solely responsible for
evaluating whether the Model Materials, Derivative Models, and Outputs are
appropriate and lawful for Your use.

The Model Materials are not designed, tested, or validated for safety-critical
use, including medical, clinical, emergency, aviation, automotive safety, or
industrial control applications. Generated speech may omit, repeat, mispronounce,
or alter text. Any such use is at Licensee's own risk and responsibility.

## 10. Liability

Licensor's liability is unlimited for intent and gross negligence; injury to
life, body, or health; liability under mandatory product-liability law; and any
express guarantee or other liability that cannot lawfully be limited.

For slight negligence, Licensor is liable only for breach of a material
contractual obligation whose performance is essential to this Agreement and
on which Licensee may reasonably rely. In that case, liability is limited to
the foreseeable damage typical for this Agreement. In all other cases,
Licensor's liability for slight negligence is excluded to the extent permitted
by law.

Where Licensee is not a consumer and makes Commercial Use of the Model
Materials, Licensee shall indemnify Licensor against third-party claims arising
from Licensee's breach of Section 7, except to the extent the claim results from
Licensor's own intent or gross negligence.

## 11. Term and termination

This Agreement begins when You first accept it or exercise rights under it and
continues until terminated. You may terminate it at any time by permanently
ceasing to exercise the rights it grants. Licensor may terminate this
Agreement only for Your breach. For a remediable breach, Licensor must give
written notice describing the breach and at least 30 calendar days to cure it
before termination. A breach is non-remediable only where cure is impossible
as a matter of fact or law; such a breach may be terminated by written notice
with immediate effect.

Licensor may terminate this Agreement by written notice with immediate effect
for breach of Section 7, paragraph 2 (fraud and unauthorized voice imitation).
All other breaches, including of the remaining use conditions, are subject to
the cure period above.

Upon termination, You must cease exercising rights in the Model Materials and
Derivative Models that were granted by this Agreement, except for the patent
license in Section 8. Termination does not require deletion of Outputs generated
in compliance with this Agreement before termination, does not terminate a
compliant downstream recipient's independent license, and does not affect
products, copies, or units distributed while You were authorized.

Sections 1, 5, 5a, 6, 8, 9, 10, 11, 12, and 13 survive termination to the extent
necessary to give them effect, as does Section 7 solely as it applies to Outputs
generated before termination.

## 12. Static and later license versions

This is a static, versioned Agreement. Licensor may offer the Model Materials
under additional or different terms in the future, but doing so does not
withdraw or modify rights already granted under this version.

A later license version applies to You only if it expressly identifies itself
as an optional replacement for this Agreement and You affirmatively elect to
use the Model Materials under that later version. This Agreement does not
grant rights under "any later version," and later versions do not apply
automatically.

## 13. General terms

This Agreement is the entire agreement between Licensor and Licensee regarding
the license granted here, except for a separate written agreement signed by
both parties. A waiver must be in writing and applies only to the stated
instance. If a provision is invalid or unenforceable, the remaining provisions
remain in effect. To the extent required by applicable law, statutory
provisions apply in place of the invalid or unenforceable provision; this
Agreement does not itself create a replacement provision.

This Agreement is governed by the laws of the Federal Republic of Germany,
excluding its conflict-of-law rules and the United Nations Convention on
Contracts for the International Sale of Goods. If Licensee is a merchant,
public-law legal entity, or public-law special fund, the exclusive venue is
Berlin, Germany. Otherwise, mandatory statutory venue rules apply.

Nothing in this Agreement deprives a consumer of protections that cannot
lawfully be waived by contract, including any mandatory protections of the
country in which the consumer has their habitual residence. The choice of law
and venue above is subject to those protections.