--- title: "merlin vs ASRT_SpeechRecognition" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/cstr-edinburgh-merlin-vs-nl8590687-asrt-speechrecognition" tools: ["cstr-edinburgh-merlin", "nl8590687-asrt-speechrecognition"] --- # merlin vs ASRT_SpeechRecognition *GraphCanon updated Jul 12, 2026* ## Verdict Pick merlin when license: merlin is Apache-2.0, ASRT_SpeechRecognition is GPL-3.0; pick ASRT_SpeechRecognition when license: ASRT_SpeechRecognition is GPL-3.0, merlin is Apache-2.0. [merlin](http://www.cstr.ed.ac.uk/projects/merlin/) reports 1.3k GitHub stars, 431 forks, and 207 open issues, last pushed Mar 3, 2020. [ASRT_SpeechRecognition](https://www.ailemon.net/asrt) has 8.4k stars, 1.9k forks, and 115 open issues, last pushed Apr 10, 2026. Figures are from public GitHub metadata via [merlin's repository](https://github.com/CSTR-Edinburgh/merlin) and [ASRT_SpeechRecognition's repository](https://github.com/nl8590687/ASRT_SpeechRecognition). | | [merlin](/tools/cstr-edinburgh-merlin.md) | [ASRT_SpeechRecognition](/tools/nl8590687-asrt-speechrecognition.md) | | --- | --- | --- | | Tagline | Neural Network based Speech Synthesis System | A Deep-Learning-Based Chinese Speech Recognition System 基于深度学习的中文语音识别系统 | | Stars | 1,319 | 8,372 | | Forks | 431 | 1,898 | | Open issues | 207 | 115 | | Language | Python | Python | | Adopt for | Merlin is an open-source Python toolkit for building Deep Neural Network models for statistical parametric speech synthesis that requires pairing with a text processor and vocoder. | - | | Persona | - | - | | Runtime | - | - | | License | Apache-2.0 | GPL-3.0 | | Categories | Speech & Audio | Model Training, Speech & Audio | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [merlin](/tools/cstr-edinburgh-merlin.md) | [ASRT_SpeechRecognition](/tools/nl8590687-asrt-speechrecognition.md) | | --- | --- | --- | | Maintenance | Dormant (18%) | Slowing (36%) | | Days since push | 2321d | 91d | | Open issues (now) | 207 | 115 | | Owner type | Organization | User | | Security scan | 594 low (594 low) | 74 low (74 low) | | Full report | [trust report](/tools/cstr-edinburgh-merlin/trust.md) | [trust report](/tools/nl8590687-asrt-speechrecognition/trust.md) | ## Decision facts: merlin - **Adopt for:** Merlin is an open-source Python toolkit for building Deep Neural Network models for statistical parametric speech synthesis that requires pairing with a text processor and vocoder. ## Choose when ### Choose merlin if… - License: merlin is Apache-2.0, ASRT_SpeechRecognition is GPL-3.0. - Tags unique to merlin: deep-learning, speech-synthesis, tensorflow, text-to-speech. - Merlin is an open-source Python toolkit for building Deep Neural Network models for statistical parametric speech synthesis that requires pairing with a text processor and vocoder. ### Choose ASRT_SpeechRecognition if… - License: ASRT_SpeechRecognition is GPL-3.0, merlin is Apache-2.0. - Tags unique to ASRT_SpeechRecognition: asrt, chinese-speech-recognition, cnn, ctc. - Also covers Model Training. - ASRT_SpeechRecognition ships Docker support for self-hosted deployment. ## When NOT to use merlin - Last GitHub push was 2322 days ago (dormant maintenance, Mar 3, 2020). Validate activity before betting a new project on merlin. ## When NOT to use ASRT_SpeechRecognition - Last GitHub push was 92 days ago (slowing maintenance, Apr 10, 2026). Validate activity before betting a new project on ASRT_SpeechRecognition. - Model Training: Try prompting and RAG first; fine-tuning is the answer to style/format, not missing knowledge. ## Common questions ### What is the difference between merlin and ASRT_SpeechRecognition? merlin: Neural Network based Speech Synthesis System. ASRT_SpeechRecognition: A Deep-Learning-Based Chinese Speech Recognition System 基于深度学习的中文语音识别系统. See the comparison table for live GitHub stats and shared categories. ### When should I choose merlin over ASRT_SpeechRecognition? Choose merlin over ASRT_SpeechRecognition when License: merlin is Apache-2.0, ASRT_SpeechRecognition is GPL-3.0; Tags unique to merlin: deep-learning, speech-synthesis, tensorflow, text-to-speech; Merlin is an open-source Python toolkit for building Deep Neural Network models for statistical parametric speech synthesis that requires pairing with a text processor and vocoder. ### When should I choose ASRT_SpeechRecognition over merlin? Choose ASRT_SpeechRecognition over merlin when License: ASRT_SpeechRecognition is GPL-3.0, merlin is Apache-2.0; Tags unique to ASRT_SpeechRecognition: asrt, chinese-speech-recognition, cnn, ctc; Also covers Model Training; ASRT_SpeechRecognition ships Docker support for self-hosted deployment. ### When should I avoid merlin? Last GitHub push was 2322 days ago (dormant maintenance, Mar 3, 2020). Validate activity before betting a new project on merlin. ### When should I avoid ASRT_SpeechRecognition? Last GitHub push was 92 days ago (slowing maintenance, Apr 10, 2026). Validate activity before betting a new project on ASRT_SpeechRecognition. Model Training: Try prompting and RAG first; fine-tuning is the answer to style/format, not missing knowledge. ### Is merlin or ASRT_SpeechRecognition more popular on GitHub? ASRT_SpeechRecognition has more GitHub stars (8,372 vs 1,319). Stars measure visibility, not whether either tool fits your constraints. ### Are merlin and ASRT_SpeechRecognition open source? Yes - both are open-source projects on GitHub (merlin: Apache-2.0, ASRT_SpeechRecognition: GPL-3.0). ### Where can I find alternatives to merlin or ASRT_SpeechRecognition? GraphCanon lists graph-backed alternatives at [merlin alternatives](/tools/cstr-edinburgh-merlin/alternatives) and [ASRT_SpeechRecognition alternatives](/tools/nl8590687-asrt-speechrecognition/alternatives) ([merlin markdown twin](/tools/cstr-edinburgh-merlin/alternatives.md), [ASRT_SpeechRecognition markdown twin](/tools/nl8590687-asrt-speechrecognition/alternatives.md)), ranked by typed relationship edges rather than popularity votes. ### Is there a machine-readable version of this comparison? Yes. The markdown twin at [this comparison](/compare/cstr-edinburgh-merlin-vs-nl8590687-asrt-speechrecognition.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, merlin or ASRT_SpeechRecognition? merlin: Dormant. ASRT_SpeechRecognition: Slowing. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance. ### Where are the full trust reports for merlin and ASRT_SpeechRecognition? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [merlin trust report](/tools/cstr-edinburgh-merlin/trust); [ASRT_SpeechRecognition trust report](/tools/nl8590687-asrt-speechrecognition/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=cstr-edinburgh-merlin`](/api/graphcanon/graph?tool=cstr-edinburgh-merlin) - LLM index: [/llms.txt](/llms.txt) - Full corpus: [/llms-full.txt](/llms-full.txt) _GraphCanon - The knowledge graph for AI development. https://www.graphcanon.com/_