Audio Annotator and Transcriber - European Portuguese

via Freelancer ·

Budget / Salary$10,000–20,000
TypeFreelance project
LocationRemote
Posted3 hours ago
Job Title: European Portuguese Audio Annotation & Transcription Specialist

Project Description:
We are seeking detail-oriented native or fluent European Portuguese (EP) linguists/annotators for an audio processing project involving customer service dialogues across four sectors: Healthcare, Public Sector, Energy, and NGO.

The work involves audio segmentation, speaker role tagging, and accurate verbatim transcription.
Key Responsibilities
Audio Segmentation & Alignment:

Segment audio line-by-line based on semantic coherence (average segment length: 5–6 seconds; maximum 8 seconds).

Maintain clean silence margins around audio cuts (100ms–150ms) while avoiding speech truncation or sudden noise inclusions.

Speaker & Attribute Tagging:

Tag audio-level attributes (Gender: Male/Female; Role: Operator/Customer).

Assign sentence-level speaker IDs (e.g., 01, C1, 02, C2 for multi-speaker dialogues).

Verbatim Transcription & Special Tagging:

Provide verbatim transcription matching spoken words exactly.

Transcribe numbers as full words (no Arabic numerals allowed).

Apply specific structural and acoustic tags:

[N] for background noise

[OVERLAP/][/OVERLAP] for simultaneous speech

[LAUGHTER] for non-verbal laughter

[PIL] for sensitive private information (addresses, phone numbers, IDs)

[OIVS] for non-recording human background voices (TV, radio, background chatter)

* for inaudible/unclear words

Requirements & Qualifications
Native or high-level proficiency in European Portuguese (EP). Note: Audio entirely in Brazilian Portuguese (BP) is considered invalid for this project.

Exceptional listening skills and high attention to rule-based guidelines.

Prior experience with audio annotation tools (DataPlus, Audacity, Praat, CVAT, or similar) is preferred.

Ability to meet strict quality benchmarks:

Word Transcription Accuracy: ≥ 98%

Speaker Role Accuracy: ≥ 97%

Special Label Accuracy: ≥ 90%

How to Apply
Please submit your proposal including:

Your rate per audio hour or per 1,000 segments.

Summary of your experience with audio annotation or transcription in European Portuguese.

Your daily availability (hours/day).
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