klatt

Klatt Formant Speech Synthesis in Rust. This is based on the original reference implementation included in the reference-implementation/ directory.

Made to be fully no_std compatible.

NOTE: This is not a text to speech engine! This is a set of algorithms designed to synthesize "speech sounding" audio samples from a variety of voice-related parameters. Text-to-speech engines can use this to generate speech, but they need to have the right kind of parameters to feed into this algorithm.

Future Goals

• no_alloc
  • Useful in specialized embedded environments.
• async integration
  • For example, to asynchronously produce a frame of audio every N samples.
• More examples
  • Currently only one example.
  • Exapand to using alternate parameters and concatenation to produce basic speech sounds.
• Integration into a TTS engine
  • The long-term goal is to create a no_std compatible text-to-speech engine.

Predictable results

To generate predictable results, use the StepRng struct as defined in the examples/make_sound.rs. This allows you to test against changes to make sure it didn't break anything :)

no_std Support

This library is no_std compatible by disabling default features, and enabling the libm feature; this allows math operations not included in core. We also take a dependency on rand; make sure if you use it, you disable its std-dependent features.

THe primary way to make sound—through the generate_sound function—is generic over any Rng implementation. Feel free to write your own, or use SmallRng for use in embedded environments.