public enum SynthesizerError: Error, CustomStringConvertible {
	case modelNotFound(String)
	case voicesNotFound(String)
	case voiceNotAvailable(String)
	case synthesisFailure(String, Error)

	public var description: String {
		switch self {
		case .modelNotFound(let path): "kokoro model not found at \(path)"
		case .voicesNotFound(let path): "voices.npz not found at \(path)"
		case .voiceNotAvailable(let name): "voice '\(name)' not found in voices.npz"
		case .synthesisFailure(let text, let error): "synthesis failed for '\(text.prefix(50))...': \(error)"
		}
	}
}