Cannot pass length_scale option to piper

[Ramblurr]

Describe the issue you are experiencing

You cannot send the length_scale option when invoking TTS as a service to cause the resulting audio to be spoken faster or slower.

What type of installation are you running?

Home Assistant OS

Which operating system are you running on?

Home Assistant Operating System

Which add-on are you reporting an issue with?

Piper

What is the version of the add-on?

1.5.2

Steps to reproduce the issue

1. Try this

  - service: tts.speak
    data:
      message: "this is a test"
      cache: false
      media_player_entity_id: media_player.office_test
      options:
        voice: en_US-libritts-high
        speaker: 0
        length_scale: 0.5
    target:
      entity_id: tts.piper

Result:

Failed to perform the action tts.speak. Invalid options found: ['length_scale']

System Health information

System Information

version	core-2024.9.2
installation_type	Home Assistant OS
dev	false
hassio	true
docker	true
user	root
virtualenv	false
python_version	3.12.4
os_name	Linux
os_version	6.6.46-haos
arch	x86_64
timezone	Europe/Vienna
config_dir	/config

Home Assistant Community Store

GitHub API	ok
GitHub Content	ok
GitHub Web	ok
GitHub API Calls Remaining	4999
Installed Version	1.32.1
Stage	running
Available Repositories	1429
Downloaded Repositories	20

Home Assistant Cloud

logged_in	false
can_reach_cert_server	ok
can_reach_cloud_auth	ok
can_reach_cloud	ok

Home Assistant Supervisor

host_os	Home Assistant OS 13.1
update_channel	stable
supervisor_version	supervisor-2024.10.0
agent_version	1.6.0
docker_version	26.1.4
disk_total	30.8 GB
disk_used	20.5 GB
healthy	true
supported	true
host_connectivity	true
supervisor_connectivity	true
ntp_synchronized	true
virtualization	kvm
board	ova
supervisor_api	ok
version_api	ok
installed_addons	Mosquitto broker (6.4.1), File editor (5.8.0), Studio Code Server (5.17.1), Advanced SSH & Web Terminal (19.0.0), AppDaemon (0.16.6), ESPHome (2024.8.3), Whisper (2.1.2), Piper (1.5.2)

Dashboards

dashboards	2
resources	14
views	7
mode	storage

Recorder

oldest_recorder_run	October 5, 2024 at 5:51 AM
current_recorder_run	October 7, 2024 at 4:47 PM
estimated_db_size	1611.76 MiB
database_engine	sqlite
database_version	3.45.3

Anything in the Supervisor logs that might be useful for us?

No response

Anything in the add-on logs that might be useful for us?

No response

Additional information

No response

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[Ramblurr]

still relevant

[shadshack]

Same issue for me, and my YAML is the same formatting.

data:
  cache: true
  message: "false"
  media_player_entity_id: media_player.office_display
  options:
    voice: en-us-amy-low
    length_scale: 0.75
target:
  entity_id: tts.piper
action: tts.speak