How to transcribe a legal deposition (accurate, fast, confidential)
A practical guide to transcribing deposition recordings using AI. Covers accuracy expectations, handling confidential audio, timestamps, speaker labels, and export formats for legal workflows.
Court reporters are the official record. AI transcription is the working copy.
That distinction matters for understanding where automated deposition transcription fits in legal workflows. It is not a replacement for a certified transcript submitted to a court. It is a faster way to get searchable text from recorded depositions, client interviews, witness statements, and internal calls for internal use: case preparation, timeline building, finding key quotes, and reviewing what was actually said.
Here is how the process works and what to watch for.
When AI transcription is useful in legal work
Case preparation. You have a recording of a deposition but the official transcript won't arrive for two weeks. An AI transcript takes 10 minutes and gives you searchable text for building your case in the meantime.
Client interviews. Recorded intake calls, client consultations, and witness interviews are often not formally transcribed. AI transcription turns them into searchable documents without sending every file to a transcription service.
Reviewing depositions before hearings. Before a hearing, attorneys often re-read depositions to find inconsistencies. A text document is faster to scan than re-watching the video recording.
Discovery review. Sorting through large volumes of recorded audio in discovery is time-consuming. AI transcription makes search-and-review feasible at scale.
Non-court documentation. In-house legal teams, compliance departments, and HR investigations record conversations that are never going to court but still benefit from a written record.
Privacy: what to look for in a transcription tool
Deposition recordings are confidential. They typically contain information covered by attorney-client privilege, litigation strategy, and personal details about witnesses and deponents.
The critical question when choosing a tool is what happens to the audio file after processing.
Avoid tools that retain audio for "service improvement" or "model training." That language means your confidential recording sits on someone's server indefinitely.
Prefer tools that delete audio immediately after the transcript is generated. TranscribTxt deletes uploaded files from its servers as soon as the transcript is ready. The audio never persists beyond the processing job.
Local alternative. OpenAI Whisper running on your own machine never sends data anywhere. It requires Python setup and is slower without a GPU, but it is the maximum-privacy option for sensitive material. If your firm handles high-volume confidential recordings, the setup cost is worth it.
How to transcribe a deposition with TranscribTxt
Step 1: Locate your audio or video file. Zoom and Teams save recordings in MP4 or M4A format. Court reporters sometimes provide audio files in WAV or MP3. All of these work with TranscribTxt.
Step 2: Go to transcribtxt.com. No installation. Works in any browser.
Step 3: Upload the file. Drag the file into the upload area. Select the language. For English depositions, auto-detect is accurate. For depositions with witnesses testifying in another language, select that language explicitly for better results.
Step 4: Wait for processing. A 60-minute deposition typically takes 5 to 8 minutes to process.
Step 5: Review the transcript. The transcript appears on screen. Scan for proper nouns, case-specific names, and technical terms that may need correction. These are the most common error points in AI transcription.
Step 6: Download. Free plan exports a TXT file. Pro plan ($12/month) adds SRT export with timestamps, which is useful for cross-referencing specific moments in the recording. Business plan ($29/month) adds speaker-labeled transcripts, JSON export, and API access.
Speaker labels for depositions
Most depositions involve multiple speakers: the attorney taking the deposition, the deponent, and sometimes opposing counsel or an interpreter.
Speaker diarization (automatic speaker labeling) is available on the Business plan at $29/month. It labels each block of speech with a speaker number, which you can then rename in the downloaded file.
For depositions with two or three clearly distinct voices recorded cleanly, diarization accuracy is high. For more complex situations with multiple speakers in a conference room, some manual review is needed.
Accuracy expectations for legal recordings
AI transcription is not verbatim-perfect the way a certified court reporter is. Here is what to expect from different audio conditions:
| Audio type | Estimated accuracy |
|---|---|
| Clean audio, native English speaker | 95-98% |
| Video conferencing (Zoom, Teams) | 92-96% |
| Speaker with accent | 88-94% |
| Background noise or crosstalk | 82-90% |
| Technical vocabulary (patent, medical) | 85-93% |
At 96% accuracy on a 60-minute deposition — roughly 8,000 to 9,000 words — you are looking at around 320-360 words that need review. That is 20 to 35 minutes of proofreading, compared to 4 to 6 hours to transcribe from scratch.
At 90% accuracy on challenging audio, the correction load is heavier, around 900 words, but still significantly faster than manual transcription.
Timestamps and navigation
SRT format (Pro plan, $12/month) includes timestamps for every segment of the transcript. This lets you jump directly to a specific moment in the recording when you need to verify context or find a specific exchange.
Plain TXT format (free plan) is clean text without timestamps, useful for reading and searching but harder to cross-reference against the original recording.
AI transcription vs human transcription for depositions
| AI (TranscribTxt) | Human transcription (Rev, etc.) | |
|---|---|---|
| Speed | 5-10 min for 60-min recording | 24-48 hours |
| Cost | $12/month (600 min) | $1.50-3.00/minute |
| Accuracy | 92-98% depending on audio | 99%+ |
| Speaker labels | Business plan ($29/mo) | Included |
| Legal admissibility | No (working copy only) | Yes (certified) |
| Confidentiality | Files deleted after processing | Varies by service |
| Best for | Case prep, drafts, internal review | Official submissions, court records |
For most legal work that does not need a certified transcript, AI transcription is faster and cheaper by an order of magnitude. A paralegal reviewing 10 hours of recorded depositions per week would pay roughly $30 on the Pro plan versus $900+ for the same volume from a human transcription service.
What TranscribTxt does not do
It does not certify transcripts. For official court exhibits, a certified human court reporter is required.
It does not do real-time transcription during a live deposition. You upload a file after the fact. For live captioning during the deposition itself, other tools handle that.
It does not identify speakers by name automatically. Speaker diarization on the Business plan labels speakers numerically — you rename them in the downloaded file.
Getting started
The free plan at transcribtxt.com includes 5 files per month with no credit card required. For regular deposition review, Pro at $12/month gives 600 minutes (roughly 10 hours of recordings) with SRT timestamp export. Business at $29/month adds speaker labels and JSON export for integration with document management workflows.
The audio file is deleted immediately after the transcript is ready.
Frequently Asked Questions
Can AI transcription be used for legal depositions?
Yes, with caveats. AI transcription handles standard deposition audio well, typically 92-97% accuracy on clean recordings with clearly spoken English. For the official record, certified court reporters remain the standard. AI transcription is practical for working drafts, case preparation, and reviewing recordings where an official transcript doesn't exist yet.
Is an AI-transcribed deposition admissible in court?
Generally no, not without a certified court reporter's signature. AI transcripts are working documents for legal professionals, not official court exhibits. For official court submissions, a certified human transcript is required.
How do I handle confidential deposition recordings when transcribing?
Choose a tool that deletes files immediately after processing. TranscribTxt removes uploaded files from its servers as soon as the transcript is ready. The audio never persists beyond the processing job. Avoid tools that store audio for model training or service improvement.
Does TranscribTxt handle legal terminology accurately?
Common legal terms transcribe well. Domain-specific proper nouns, unusual names, and highly technical vocabulary may need manual correction. A typical 60-minute deposition might require 20-50 corrections at 96% accuracy. For verbatim accuracy on every word, certified human transcription is more reliable.
How long does it take to transcribe a deposition recording?
A 60-minute deposition typically processes in 5 to 8 minutes with TranscribTxt. Most 1-hour recordings are done in under 10 minutes.