# Text-to-speech on Internal US English dataset (test)

Source: [Text-to-speech on Internal US English dataset (test)](<https://www.sota2.com/research/sota/text-to-speech-on-internal-us-english-dataset-test>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2026-02-26T05:50:04.336Z

Evaluation of Text-to-Speech synthesis quality on the test split of the Internal US English dataset, typically measured using Mean Opinion Score (MOS).

A research result applies to its stated dataset, split, metric and evaluation configuration. Compare like-for-like settings, preserve the metric's unit and direction, and distinguish paper-reported results from independent reproduction. The best result recorded here is not a claim of exhaustive, current global coverage.

| Scope | Recorded value |
| --- | --- |
| Task | Text-to-speech |
| Dataset (including any stated split) | Internal US English dataset (test) |
| Metric | MOS |
| Unit | SCALAR |
| Direction | Higher is better |
| Results loaded | 6 of 6 |
| Coverage | All results currently returned for this benchmark |

Evaluation settings may differ between results. The original papers and recorded configurations are needed to establish comparability. A shared metric name alone does not establish an identical protocol.

## Metrics

- [MOS](<https://www.sota2.com/research/sota/text-to-speech-on-internal-us-english-dataset-test.md?metric=MOS>): Higher is better; unit: SCALAR.

## Recorded results

| Method | MOS | Result date | Report paper |
| --- | --- | --- | --- |
| Ground truth | 4.582 | Not recorded | 68fa64091e209131cea022df |
| Tacotron 2 | 4.526 | Not recorded | 68fa64091e209131cea022df |
| WaveNet (Linguistic) | 4.341 | Not recorded | 68fa64091e209131cea022df |
| Concatenative | 4.166 | Not recorded | 68fa64091e209131cea022df |
| Tacotron (Griffin-Lim) | 4.001 | Not recorded | 68fa64091e209131cea022df |
| Parametric | 3.492 | Not recorded | 68fa64091e209131cea022df |

### Ground truth

MOS: 4.582. Result ID: 698c09cbf729bc7f68e7f0bf.

[Reporting paper](<https://www.sota2.com/research/paper/68fa64091e209131cea022df.md>)

Recorded evaluation configuration: {"System":"Ground truth"}. This record does not assert independent reproduction.

### Tacotron 2

MOS: 4.526. Result ID: 698c09cbf729bc7f68e7f0c0.

[Reporting paper](<https://www.sota2.com/research/paper/68fa64091e209131cea022df.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa64091e209131cea022df.md>)

[Implementation](<https://google.github.io/tacotron/publications/tacotron2>)

Recorded evaluation configuration: {"System":"Tacotron 2"}. This record does not assert independent reproduction.

### WaveNet (Linguistic)

MOS: 4.341. Result ID: 698c09cbf729bc7f68e7f0be.

[Reporting paper](<https://www.sota2.com/research/paper/68fa64091e209131cea022df.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa62bf1e209131ce9fb1ba.md>)

Recorded evaluation configuration: {"System":"WaveNet (Linguistic)"}. This record does not assert independent reproduction.

### Concatenative

MOS: 4.166. Result ID: 698c09cbf729bc7f68e7f0bd.

[Reporting paper](<https://www.sota2.com/research/paper/68fa64091e209131cea022df.md>)

Recorded evaluation configuration: {"System":"Concatenative"}. This record does not assert independent reproduction.

### Tacotron (Griffin-Lim)

MOS: 4.001. Result ID: 698c09cbf729bc7f68e7f0bc.

[Reporting paper](<https://www.sota2.com/research/paper/68fa64091e209131cea022df.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa64121e209131cea028d5.md>)

Recorded evaluation configuration: {"System":"Tacotron (Griffin-Lim)"}. This record does not assert independent reproduction.

### Parametric

MOS: 3.492. Result ID: 698c09cbf729bc7f68e7f0bb.

[Reporting paper](<https://www.sota2.com/research/paper/68fa64091e209131cea022df.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa629d1e209131ce9fa36c.md>)

Recorded evaluation configuration: {"System":"Parametric"}. This record does not assert independent reproduction.

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