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How to transcribe phone interviews for market research with AI

2026-07-07 VOCAP Team

In a phone-based market research study you ask the same set of questions to dozens of people and you need the exact verbatim of each answer to code it and compare. Taking notes while you run the interview forces you to summarise on the fly and lose nuance that later weighs on the analysis. Transcribing your phone interviews with artificial intelligence gives you the literal text of each call, so you can code the responses, quote the participant accurately and pull insights without relying on what you remember.

In this guide you will see why it is worth it for a researcher, the challenges of a phone interview, how to do it step by step with VOCAP and what to do with the transcript for your analysis.

Why transcribe a research phone interview

Unlike a closed survey, the phone interview of a market research study captures open answers where how the participant says it matters, not just what they tick. An automatic transcription leaves the faithful verbatim so the analysis starts from the real words.

  • Verbatim to code: you have the literal text of each answer, the basis for assigning codes and spotting patterns across interviews.
  • Exact quotes: you back each insight in the report with the participant's real sentence, without paraphrasing from memory.
  • Focus on the conversation: you attend to the person and probe with judgement instead of splitting your focus to write.
  • Comparability: with every interview in text you can search a term or theme across the sample in seconds.

With AI you also get a summary of each call and the key points, useful for a first pass before coding in detail.

The challenges of a phone interview

A phone interview has different challenges from an in-room recording: the line, consent and the call volume of a study. They are worth keeping in mind.

  • Line quality: phone audio is usually poorer than in person, so recording at the best possible quality greatly improves the transcript.
  • Consent: tell the participant the call is recorded for the study and get their agreement before starting; never covertly.
  • Personal data: opinions and sometimes sensitive data come up, so handling the audio must respect data-protection rules and stay limited to the study's purpose.
  • Sample volume: a study means many calls, so a fast audio-to-text flow is what makes transcribing them all feasible.

Audio quality is the factor that matters most: the cleaner the recording of the call, the more faithful the verbatim.

How to transcribe phone interviews step by step

The flow with VOCAP is simple and works whether you record from a calling platform or a recording app:

  1. Record the call: use your telephony system's recording feature or an app, telling the participant and with their agreement.
  2. Upload the file to VOCAP: drag the MP3, M4A or MP4 into the app, with no prior conversion.
  3. Let the AI transcribe: the audio is processed automatically and you get the full text in a few minutes per call.
  4. Code on the text: review the transcript, mark the responses and take the codes and quotes into your analysis tool.

You do not need to install anything: you upload each call and download the result ready to code.

What to do with the transcript for your analysis

The transcript is the basis for solid qualitative analysis. With the verbatim in front of you, you can:

  • Code the responses: assign codes to each passage and group recurring themes across the sample.
  • Select quotes: pull verbatim sentences that illustrate each finding for the report.
  • Search for patterns: with every interview in text, search a term or idea and measure how many participants mention it.
  • Archive the evidence: keep the searchable text as a traceable backing for the study's conclusions.

Do you have your last phone interviews recorded with the participants' agreement? Upload them to VOCAP and let the AI turn the calls into verbatim ready for your analysis.

FAQ

Does the transcript keep the exact verbatim?

The AI transcribes what is said on the call so you work on the literal text. For delicate quotes a quick review is worth it, especially if the line was noisy.

Should I tell people I record the phone interview?

Yes. Inform the participant the call is recorded for the study and get their agreement before starting; it should never be done covertly.

Does it work with call audio, which is usually lower quality?

Yes, although the line quality affects the result. Recording at the best possible quality and in a noise-free environment noticeably improves the text's fidelity.

Is it good for transcribing many interviews from a study?

Yes. You upload each call separately and the AI processes them automatically, which makes transcribing the whole sample feasible without doing it by hand.

How long does it take to transcribe a 20-minute interview?

Usually a few minutes, depending on the length and audio quality. The process is automatic from start to finish.

Transcribe phone interviews for market research with AI

About the author

Manuel Gregorio — Founder of VOCAP

Founder of VOCAP. Since 2024 I help professionals — lawyers, doctors, journalists, podcasters and business teams — turn their recordings into searchable text with AI, GDPR-compliant and from EUR 1/hour.

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