synth1B1 is a corpus consisting of one million hours of audio: one billion 4-second synthesized sounds. The corpus is multi-modal: Each sound includes its corresponding synthesis parameters.

synth1B1 is generated on the fly by torchsynth 1.x, using the Voice synth with its default settings.

Experimental Control

Researchers can denote subsamples of this corpus as synth1M1, synth10M1, etc., which would refer to the first 1 million and 10 million samples of Synth1B1 respectively.

Besides having a batch_size that is a multiple of 32, if you change any of the defaults in SynthConfig, please call that in your work, and use a variant of the name synth1B1.

One tenth of the examples are designated as the test set. See Reproducibility > Train vs. Test for more information.

The nomenclature “synth1B1-312-6” denotes batch 312 (assuming batch size of 128) and sound 6 within that batch.

Semantic Versioning

We use a slightly different convention than traditional Semantic Versioning.

Given a version number MAJOR.MINOR.PATCH, we increment the:

  • MAJOR version when the default output of Voice changes.

  • MINOR version when we make incompatible API changes, but the default output of Voice remains reproducible.

  • PATCH version when we make backwards compatible bug fixes and improvements.

For example, any torchsynth 1.x release can generate synth1B1.

When torchsynth 2.x is released, it will generate synth1B2. Any pre-release (e.g. 2.0.0-pre1) is not guaranteed to generate synth1B2 until 2.0.0 is released.

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