Release notes 7.0.0

Capacity Private Cloud 

Release date: 17th February 2026

Summary

This page highlights all the changes, new features and bugs addressed within the Capacity Private Cloud (formerly LumenVox Containers) version 7.0.0 release. This change affects Speech products. This version is not available for Voice biometric products, this will be made available in future releases. 

This release builds upon the 6.3.0 release - see https://lumenvox.capacity.com/article/294286/release-notes-6-3-0

These release notes include changes as part of the following patch releases: grammar-6.3.1

Highlights

1. ASR modelling backend was updated to address security vulnerabilities. This is a breaking change, so new ASR models for all languages need to be downloaded and installed (ASR model version 7.X).

   • The English ASR language model has had its vocabulary expanded and improvements have been made for alpha numeric repetition. 

   • All existing ITN models have also been updated to cater for new ASR engine.

2. High-Definition ASR models released for English, Spanish, French, Italian, Portuguese and Japanese with higher accuracy.

   • The ASR models include pronunciation model updates for Apple Hero word recognition.

3. Changes made to allow clients to dynamically switch between standard and High-Definition models.

4. A custom Apple Language and Acoustic model is released.

5. New Neural TTS released featuring improved quality voices and functionality (all neural voices to be used as version 8)

   • 19 new high quality US English voices released including 2 new Capacity feature voices (Caspian & Aurora).

   • New TTS voices released for Catalan, Galician and Valencian.

   • TTS now offers over 100 voices across 30 languages & dialects

6. CPA & AMD updated to detect Apple call screening.

7. Capacity’s new Neuron service powering NLU intent & slot detection has been released. A new Neuron testing tool has also been added to the Deployment Portal.

8. A Beta version of the new Post Processing Profiles feature is released into the Deployment Portal for users to add regex rules for ASR post processing.

9. Admin and Deployment Portals have been restyled and rebranded to Capacity.

10. The Admin Portal now provides language support in Spanish, French, German and Portuguese.

11. Admin settings per deployment to limit access to custom models has been added to the Admin Portal

12. Grammar testing tool has been updated to supply a decision parse tree and provide better grammar error feedback. Built-in grammars or grammars loaded via URL can also be tested.

13. File Store functionality has been added into the Container stack to assist clients with local storing and retrieval of grammars, phrase lists, SSML, Lexicons etc. This has been added to deployment portal. 

14. Sentiment Analysis services were moved out of the NLU pod to ITN thus no longer requiring GPUs to run

15. Language Identification now allows for configuration to limit the scope of languages detected.

16. Istio service mesh support has been added. Linkerd remains the default service mesh. 

17. Persistent volume was refactored to simplify the storage structure

18. Various vulnerability scan issues resolved

19. LumenVox API now supports 2-channel raw audio (ULAW, ALAW, PCM16). 

20. The Grammar manager has been refactored and includes improved error handling & messaging. 

21. Update Neural TTS, Resource, License and Grammar services to apply http proxy environment variables when connecting to a web server 

22. Redis & rabbit were optimized to improve performance when scaling. We recommend that session, vad and lumenvox-api pods not exceed 100 concurrent interactions per pod

23. Introduced an updated ECMAScript 2023 (ES14) engine used when processing SISR grammars.

24. Helm chart changes were made to allow for auto scaling and resource reservations (for nodes & pods) and limitations for all services.

25. Go-SDK released from Beta

What’s new on Capacity Private Cloud 7.0.0 

New features

• ASR modelling backend was updated including upgrade of base OS ubuntu to 24.04 image and python to version 3.12 to address security vulnerabilities. This is a breaking change, so new ASR models for all languages need to be downloaded and installed (ASR model version 7.X).

  • The English ASR language model has had its vocabulary expanded and improvements have been made for alpha numeric repetition. 

  • All existing ITN models have also been updated to cater for new ASR engine.

• High-Definition ASR models released for English, Spanish, French, Italian, Portuguese and Japanese with higher accuracy.

  • The ASR models include pronunciation model updates for Apple Hero word recognition.

  • The following helm chart changes are used to enable hidef models

asrLanguages:
  - name: "en"
    version: "7.0.0"
customAsrModels:
  - name: "asr_encoder_hidef_model_en"
    version: "7.0.0

• A custom Apple Language and Acoustic model is released.

• New Neural TTS released featuring improved quality voices and functionality (all neural voices to be used as version 8) 

  • 19 new high quality US English voices released including 2 new Capacity feature voices (Caspian & Aurora).

  • New TTS voices released for Catalan, Galician and Valencian.

  • TTS now offers over 100 voices across 30 languages & dialects

• CPA & AMD updated to detect Apple call screening - for more information see: LumenVox API Documentation.

• Capacity’s new Neuron service powering NLU intent & slot detection has been released. A new Neuron testing tool has also been added to the Deployment Portal.

  • This is enabled in the helm charts as follows:

enableNeuron: true
neuronLanguages:
  - name: "en"
neuronModels:
  - name: "banking"
    language: "en_us"

• A Beta version of the new Post Processing Profiles feature is released into the Deployment Portal for users to add regex rules for ASR post processing.

• Admin and Deployment Portals have been restyled and rebranded to Capacity.

• The Admin Portal now provides language support in Spanish, French, German and Portuguese.

• Admin settings per deployment to limit access to custom models has been added to the Admin Portal

• Grammar testing tool has been updated to supply a decision parse tree and provide better grammar error feedback. Built-in grammars or grammars loaded via URL can also be tested.

• File Store functionality has been added into the Container stack to assist clients with local storing and retrieval of grammars, phrase lists, SSML, Lexicons etc. This has been added to deployment portal. 

  • We recommend that customers enforce whitelist access to all ingress services:

  • admin-portal-ingress

  • deployment-portal-ingress

  • file-store-ingress

  • lumenvox-api-ingress-grpc

  • management-api-ingress

  • reporting-api-ingress-grpc

    • The following helm chart change enbales this service (enabled by default):

enableFilestore: true

• Sentiment Analysis services were moved out of the NLU pod to ITN thus no longer requiring GPUs to run

• Language Identification now allows for configuration to limit the scope of languages detected- InteractionCreateLanguageIdRequest:target_languages

• Istio service mesh support has been added. Linkerd remains the default service mesh. The following helm chart change enables this support:

serviceMesh:
  type: "istio"

• Persistent volume was refactored to simplify the storage structure

• Various vulnerability scan issues resolved

• LumenVox API now supports 2-channel raw audio (ULAW, ALAW, PCM16). Audio format Protocol Documentation now has an additional field channel_count to specify channel count for RAW audio input.

• The Grammar manager has been refactored and includes improved error handling & messaging. 

• Update Neural TTS, Resource, License and Grammar services to apply http proxy environment variables when connecting to a web server

• The following helm chart changes enable HTTP proxy settings:

httpProxy:
  enabled: true
  proxyUrl: "http://proxy.capacity.com:3128"
  noProxy: ".local,.lumenvox"

• Redis & rabbit were optimized to improve performance when scaling.

• Introduced an updated ECMAScript 2023 (ES14) engine used when processing SISR grammars, moving from the previous ECMAScript 2020 (ES11) engine that is in version 6. Please refer to the online ECMAScript documentation for details. There should be no breaking changes for most users in this upgrade since ECMAScript is relatively stable and is designed to maintain backward compatibility.

• Helm chart changes were made to allow for auto scaling and resource reservations (for nodes & pods) and limitations for all services

  • A new helm chart configuration allows clients to specify a default deployment id to fully allow installation automation:

    enableDefaultDeployment: true
    defaultDeployment:
      customDeploymentId: "b75b8b1d-fcbf-4695-9bd3-20f9870df815"
      description: "test-description"
      name: "test-name"

• The go sdk has been released from beta version

  
  Updates

• Historical pod restart issue resolved in all ASR models

• Resolved ASR issue with Swedish generating excessive logs for a single failed interaction

• Duplicate word issues with High Definition ASR version 5.X models resolved for grammar based recognition

• Resolved ITN issue with "|" characters appearing in final results

• Resolved ITN issue with unexpected character between product names like “iPhone ? 17” and “iPhone .17”

• ITN issue where email addresses, names and addresses are fully capitalized resolved

• Licensing pod updated to resolve issues if a client inadvertently scales this incorrectly (by nominating a leader and slave pod)

• Issue when performing helm upgrades and configuration service fails to load all configurations for all deployments - causing certain deployments to become unusable resolved

• Grammar pod memory leak resolved

• Client reported MRCP garbage rule returns “NO-MATCH” resolved

• Resolved issues using built in grammars with es-MX language code 

• Recognition of currency amount issues resolved for es-US using the built-in currency (es, es-MX and es-CO grammars impacted)

• Added port level grammar-based stats for MRCP transactions

• Updates made to licensing service and licensing metrics

• Infosec vulnerability - out of bounds error resolved for the simple mrcp client

• Infosec vulnerability - gnupg2 vulnerability in ubuntu:24 resolved

• Infosec vulnerability - MongoDB updated to v8.0.17 as a fix for CVE-2025-14847. Customers advised to updated to 7.0.29 or 8.0.17.

• Resolved AMD false "beep" detected when no beep existing in the audio

• Admin portal button added to copy the deployment id in the deployment details page

• Admin portal column sorting issues resolved

• Admin portal issues with importing deployments resolved

• Admin & deployment portals) and Management API refactored to improve deployment & deployment meta data handling 

• Admin & deployment portal pagination issues resolved

• TTS issue when adding punctuation after the </say-as> causing the synthesis to be incorrect resolved

• TTS Synthesizer failure -1 error with inline Spanish SSML resolved 

• TTS SSML say-as interpret-as="vxml:currency" not working as expected resolved

• TTS SSML say-as interpret-as="address" not working as expected resolved

• Improvements made to Brazilian Portuguese TTS voices

• Resolved issues with log messages being printed - unable to create licensing report for AMD/CPA interaction

• New English ASR models provide improved performance with repetition of Alpha numerics

Installation notes

The following helm chart can be used

Helm Chart

Note that for MRCP there is no helm chart but a docker compose file. MRCP will run on its own Docker virtual machine which will integrate into the Kubernetes cluster.

Run the following command helm repo update to update the helm charts

Note: if using TTS we recommend you add the following toggle into the values file legacyEnabled. To enable legacy TTS this must be set to True, and False to enable the new neural TTS. The new neural TTS voices must be loaded in the values file in order for the models to be retrieved from S3.

 ttsLanguages:
    - name: "en_us" 
      legacyEnabled: false
      voices:
         - name: "jeff"                 
         - name: "aurora" 

If installing for MRCP - note that the conf file settings for MRCP API have been replaced with environment variables e.g. to enable compatibility mode.

If installing ITN, the following changes are required in the helm charts:

itnLanguages:
    - name: "en"
    - name: "es" 

 Key installation guide changes:

Capacity recommends that a minimum of version 1.33 Kubernetes.

The following versions of required software are supported:

• PostgreSQL: 17.5 (recommended)

• MongoDB: 8.2 (minimum) alternatively  7.0.29 or 8.0.17

• Redis: 8.2 (minimum)

• RabbitMQ: 4.1.8(recommended)

• NGINX: 1.14.1 (Please note that NGINX are deprecating their ingress support, Capacity are investigating alternatives)

• Linkerd: edge 25.8.4

The full software support matrix can be found here: LumenVox Kubernetes software support matrix 

The following helm chart can be used

Helm Chart

Note that for MRCP there is no helm chart but a docker compose file. MRCP will run on its own Docker virtual machine which will integrate into the Kubernetes cluster.

Run the following command helm repo update to update the helm charts 

 ttsLanguages:
   - name: "en_us" 
     legacyEnabled: false
     voices:
       - name: "jeff"    
         version: "4.0.0"       
       - name: "megan"         
         version: "4.0.0"

If installing ITN, the following changes are required in the helm charts:

itnLanguages:
  - name: "en"
  - name: "es"

Key installation guide changes:

LumenVox recommends that a minimum of version 1.31 Kubernetes.

The following versions of required software are supported:

• PostgreSQL: 17.4 (recommended)

• MongoDB: 8.0.11 (minimum)

• Redis: 8.0.3 (minimum)

• RabbitMQ: 4.1.1(recommended)

• NGINX: 1.12.4

• Linkerd: edge 25.8.4
  
  

The full software support matrix can be found here: LumenVox Kubernetes software support matrix

Upgrade procedures

Upgrade or migration from previous versions is supported. Please contact LumenVox to discuss. See notes above if upgrading from 4.7. 

If you are performing an upgrade, you need ensure that your NGINX versions are updated to 1.14.1

If installing ITN, the following changes are required in the helm charts:

itnLanguages:
    - name: "en"
    - name: "es"

Updated API guide

APIs for all speech products available on version 7.0.0 can be obtained here: LumenVox API Documentation         

Information for voice biometric products relates to version 3.4.0-3.4.3

Model versions as part of the release

• ASR updated to remove dependencies flagged in vulnerability scans.

  • All existing ASR models repackaged as 7.0. Previous ASR models are not compatible with Capacity Private Cloud version 7.0.0

  • Higher definition models are tagged as hidef (For higher definition accuracy models - speak to Capacity before you use these as they will require additional ASR pod scaling)

  • New High-Definition ASR models released for English, Spanish, French, Italian, Japanese and Portuguese.

• TTS - Version 8.X (Neural TTS) sample rate 16 - can be down sampled to 8kHz. Legacy TTS models will still run under version 1.0. Further voice enhancements are currently being released in TTS voices version 8.1.0 so Capacity recommends that clients cater for 8.X)

  • New TTS voices released for Catalan, Galician and Valencian.

  • 19 new en-US voices including Caspian and Aurora released under TTS version 8.1.X

• VB - 2.1.15

• VB incorporates Selene 2.4.3 which was integrated into the Container stack
  
  
  

Model version changes

• All existing 4.X ASR acoustic & language models have been released as 7.X; all existing 5.X ASR acoustic models released as 7.0.0 (hidef)

• All TTS voices released as 8.0 (certain voices have been updated to 8.1)