espeak-ruby is a Ruby gem providing a simple API to generate Text-to-Speech audio using the `espeak` command-line tool and optionally compress to MP3 using `lame`. It exposes two main classes: `ESpeak::Speech` for generating speech (speak, save to file, or retrieve raw bytes) and `ESpeak::Voice` for listing available voices. The architecture is a thin wrapper around external CLI commands using `IO.popen`, with a clean hash-based options interface for pitch, speed, voice, amplitude, and capital letter emphasis. The repository also includes a full demo web application (Roda + Stimulus + WaveSurfer) that demonstrates the library in a browser, with a Kubernetes deployment configuration. The core library is well-structured, tested, and actively maintained, but it is a straightforward wrapper with no complex internal logic.