Marba Speech to Text: Preserving a Chadic Language with AI

Introduction to Marba Language

Marba is a Chadic language spoken in the Mayo-Kebbi Est region of Chad, primarily in the vicinity of the town of Bongor. With an estimated 20,000 speakers, it is a minority language that is vital for the cultural identity of the Marba people. The language uses the Latin script and is tonal, meaning that pitch differences can change the meaning of a word. Like many African languages, Marba is oral, with a rich tradition of storytelling, proverbs, and songs.

Why Accurate Marba Speech-to-Text Matters

In an increasingly digital world, language documentation is essential for preventing language loss. Accurate speech-to-text for Marba allows communities to:

• Create written records of oral histories and folklore.
• Produce educational materials for children learning to read and write in Marba.
• Generate subtitles for videos, making content accessible to the deaf and hard of hearing.
• Enable automatic transcription of church sermons and community meetings.

Without reliable ASR, these tasks are either impossible or require expensive manual transcription by a handful of trained linguists.

Specific Transcription Challenges in Marba

Marba presents several challenges for automatic speech recognition:

• Tonal distinctions: The language contrasts high, low, and falling tones. For example, má (with high tone) means 'mother', while mà (with low tone) means 'dew'. A standard ASR that ignores tone would confuse these words.
• Vowel harmony: Marba has a system where vowels within a word must belong to the same harmonic set. This leads to complex coarticulation that can blur the boundaries between phonemes.
• Limited data: Since Marba is not a commercially important language, there are few existing speech corpora. Speechyou addresses this by using transfer learning from related Chadic languages like Musgum and Masa.

Use Cases for Marba Transcription

Podcasts and Oral History

Community radio stations in Chad often broadcast in Marba. By transcribing these broadcasts, stations can archive their content and provide searchable text. Speechyou's export to SRT and VTT formats makes it easy to add subtitles to video recordings of elder interviews.

Research and Documentation

Linguists working on Marba can upload field recordings and receive transcriptions in minutes instead of hours. This accelerates the creation of dictionaries and grammars.

Accessibility

Deaf Marba speakers can now access video content through captions. This is especially important for educational videos and religious materials.

How Speechyou Supports Marba

Speechyou is one of the few AI transcription tools that supports Marba. Our model is fine-tuned to handle tone and vowel harmony, and we continuously improve it through user feedback. The Solo plan offers unlimited transcription minutes, so users can transcribe long recordings without worrying about per-minute costs. We also support multiple export formats including SRT, VTT, and plain text.

Conclusion

Marba speech-to-text is not just a technical feat; it is a tool for cultural preservation. By providing accurate and affordable transcription, Speechyou helps Marba speakers maintain their language in the digital age. Whether you are a linguist, a community leader, or a content creator, you can now transcribe Marba audio with confidence.