How to specify settings for glow-speak?

[nagyrobi]

After adding the addon to HA with my language (which is available only under Glow-Speak system), the documentation only shows quality, denoiser, length settings only for Larynx:

• larynx_quality
• larynx_denoiser_strength
• larynx_noise_scale
• larynx_length_scale

I can't use Larynx as my language is not supported by it. However with Glow-Speak I have it working, I'd just like to adjust a bit the parameters above, especially length (speed) and denoiser.

At the bottom of the docs I see that voice quality can be set by appending for example ;medium to the voice parameter, but can't find a way to adjust denoiser and length. The web interface allows setting of the Denoiser for testing purposes and it works.

But what I miss most (also from the web interface) is the length_scale adjustment as the syntethysed speech is a bit too fast for us, the engine should speak about 20% slower for the announcements to be properly understandable.