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Code-Shift (Native European Spanish Speakers) Audio Recording (Dual-Channel) Recording Approach We will deliver natural bilingual conversations in a contact-center (agent–customer) format with strict adherence to code-switching requirements. Audio Format * Dual-channel WAV (Agent / Customer separated) * Native 8kHz and 16kHz recordings (50/50 split) * Single recording per conversation with clear channel separation Code-Switching Implementation We support both required patterns: Type 1: Bilingual Agent–Customer Interaction** * Agent: 100% secondary language(English) * Customer: 100% primary (European Spanish) language * ~50% code-switching at conversation level * Natural conversational flow (no forced switching) * Single audio + single transcription with language tags Conversation Design * Duration: 5–30 minutes (avg. ~10 minutes per conversation) * Multi-turn, real-world interaction style * Context-driven switching (clarifications, technical terms, etc.) * Natural tone, pauses, and conversational dynamics Speaker & Resource Standards * 80–90% native speakers for primary language * Proficient bilingual speakers for secondary language * Max 30 minutes recording per speaker (~6 conversations) * Balanced and scalable speaker pool Audio Quality Standards We strictly ensure: * Minimum 25 dB signal-to-noise ratio * No background noise, echo, or distortion * Consistent volume and clarity * Natural delivery (not scripted reading) * No AI-generated or synthetic audio Quality Assurance & Rework * Internal multi-level QA for audio and transcription * Code-switching ratio and naturalness validation * Acceptance target: ≥95% pass rate * Rework handled within the same milestone if required We ensure: * Consistent quality across all language pairs * Scalable execution for large volumes * Reliable communication and milestone-based delivery We’re ready to start with a pilot batch and scale based on your requirements.
Project ID: 40387727
2 proposals
Remote project
Active 7 days ago
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2 freelancers are bidding on average $18 USD/hour for this job

Your project caught my attention right away, especially the requirement for natural bilingual conversations in a contact-center format with strict adherence to code-switching requirements, such as the 50% code-switching at conversation level, and the need for dual-channel WAV recordings with clear channel separation, which I've worked with in the past on a similar audio recording project, where I had to ensure consistent volume and clarity for a large volume of recordings. I've also experience with audio quality standards, including ensuring a minimum 25 dB signal-to-noise ratio, and I'm curious to know how you plan to handle the internal multi-level QA for audio and transcription to achieve the acceptance target of ≥95% pass rate. I'd like to discuss this project further and explore how I can contribute to its success. Let's schedule a call to go over the details. Happy to share more about my approach — just send me a message.
$15 USD in 7 days
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Del Viso, Peru
Member since Apr 18, 2026
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