Bulk Audio Transcription: Transcribe 20+ Files
BrassTranscripts bulk transcription lets you upload and process audio or video files in large batches through a single self-service workflow. Files process concurrently with automatic speaker identification, 99+ language support, and TXT transcript output with your choice of format. Volume pricing applies automatically based on batch size.
Quick Navigation
- How Bulk Transcription Works
- Bulk vs. Batch: Web Upload vs. API Pipeline
- Who Uses Bulk Audio Transcription?
- Supported Formats and Limits
- Bulk Transcription Pricing
- How Bulk Pricing Compares
- Built-In Safeguards for Large Batches
- How to Get Started
- Frequently Asked Questions
How Bulk Transcription Works
Standard transcription services handle one file at a time. Bulk transcription removes that bottleneck. Upload dozens or hundreds of files at once, and they process concurrently through the same AI transcription engine that powers every BrassTranscripts job.
What you get with bulk transcription:
- Concurrent processing — multiple files transcribe simultaneously, not sequentially
- Batch progress tracking — a dedicated dashboard showing status across all files
- Automatic speaker identification — every file gets speaker labeling included
- 99+ language support — automatic language detection across your entire batch
- TXT transcript output — standard format (clean text with periodic timestamps) or fully timestamped segments (
[00:00 - 00:15] SPEAKER_01: text) — set per project - Secure checkout — pay when complete, download your full batch as a ZIP
The quality is identical to single-file transcription. The difference is throughput.
Bulk vs. Batch: Web Upload vs. API Pipeline
The terms "bulk transcription" and "batch transcription" are used interchangeably across the industry, but they typically describe two different approaches to processing multiple audio files.
Web-based bulk upload
Services like BrassTranscripts, TurboScribe, and ScreenApp provide a browser-based interface where you drag-and-drop files, track progress on a dashboard, and download results. No coding required. This is the approach most non-technical teams use to batch transcribe audio files — upload everything, wait for processing, pay, and download.
BrassTranscripts has no per-upload file cap. TurboScribe caps uploads at 50 files at a time. Both process files concurrently rather than sequentially.
API-based batch pipelines
Services like AssemblyAI and Microsoft Azure Speech provide developer APIs for programmatic batch transcription. You write code to send files (often from cloud storage like S3), poll for status or receive webhooks, and retrieve results as JSON. AssemblyAI supports up to 200 concurrent transcription jobs per API key.
API pipelines make sense when you're integrating transcription into an automated workflow — processing thousands of files nightly, feeding transcripts into a data pipeline, or building transcription into your own product. If you're a team that just needs to upload files and get transcripts back, the web-based approach is faster to set up and doesn't require developer resources.
Who Uses Bulk Audio Transcription?
Bulk transcription fits any workflow where audio or video files pile up faster than you can process them individually:
-
Call centers and sales teams — transcribe recorded customer calls, training sessions, or QA reviews in batch. A mid-size sales team might record 50-100 calls per week across their reps. Processing them individually would take someone's entire day just managing uploads.
-
Research teams and journalists — process dozens of interviews for a single study or investigation. Qualitative research projects routinely involve 30-60 participant interviews. Batch transcription turns a week of manual transcription work into a single upload session.
-
Legal and compliance — handle depositions, hearings, or recorded proceedings at volume. Litigation support often requires transcripts of 100+ recordings for a single case. Read how one paralegal's request for 102 legal audio files shaped our bulk service, and see how firms combine bulk transcription with AI prompts for post-transcription case analysis.
-
Education and training — transcribe lecture series, workshops, or classroom recordings across a semester. A single university course generates 30-40 recordings over a semester, and accessibility requirements mean all of them need transcripts.
-
Podcast and media producers — work through a backlog of episodes or raw interview footage. Podcast networks with 20+ shows often need to transcribe an entire back catalog for SEO, show notes, or content repurposing.
-
Accessibility and compliance teams — generate captions and transcripts across a content library. Organizations with existing video or audio archives often face compliance deadlines that require batch processing hundreds of files.
Organizations processing recorded phone calls, interview archives, or meeting backlogs see the most immediate benefit.
Supported Formats and Limits
Bulk transcription supports the same formats and limits as standard BrassTranscripts:
| Specification | Detail |
|---|---|
| Audio formats | MP3, M4A, AAC, WAV, FLAC, OGG, Opus, WebM, MPEG, MPGA |
| Video formats | MP4, MPEG, WebM |
| Max file size | 250MB per file |
| Max duration | 2 hours per recording |
| Output format | TXT (standard or fully timestamped segments) |
| Languages | 99+ with automatic detection |
| Speaker ID | Included on every file |
All files follow the same privacy standards. Audio is automatically deleted within 24 hours of processing. Bulk transcripts are available for download for 10 days after payment. Your content is never used to train AI models.
Bulk Transcription Pricing
Volume pricing applies automatically based on your batch size. No subscriptions, no monthly commitments, no per-seat licensing.
| Batch Size | Price Per File | Example Total |
|---|---|---|
| 1–19 files | $90 flat fee | 10 files = $90.00 |
| 20–49 files | $4.50 / file | 30 files = $135.00 |
| 50–99 files | $4.00 / file | 60 files = $240.00 |
| 100–249 files | $3.50 / file | 120 files = $420.00 |
| 250+ files | $3.00 / file | 300 files = $900.00 |
All prices include automatic speaker identification. Transcripts delivered as TXT files.
Prices are calculated at checkout based on the number of completed files in your batch — you see the exact total before paying.
How Bulk Pricing Compares
Bulk transcription pricing varies significantly across services. Some charge per minute of audio, some per file, and some charge a flat monthly subscription. Here's how the main options compare based on their published pricing as of early 2026.
| Service | Pricing Model | Batch Upload Limit | Speaker ID | API Required |
|---|---|---|---|---|
| BrassTranscripts | $3.00–$4.50/file, pay-per-use | No cap | Included | No |
| TurboScribe | $10/mo (annual) unlimited | 50 files per upload | Included | No |
| Rev.com AI | $0.25/min (~$15/hr) | ZIP up to 20GB | Not specified | No |
| AssemblyAI | $0.15/hr pay-per-use | 200 concurrent (API) | +$0.02/hr add-on | Yes |
| Otter.ai | $8.33–$20/mo subscription | 3–10 file imports/month | Included | No |
Sources: TurboScribe pricing, Rev.com pricing, AssemblyAI pricing, Otter.ai pricing. Pricing verified March 2026.
Key differences worth noting:
TurboScribe is the most cost-effective option for teams that transcribe heavily every month. At $10/month (annual billing), you get unlimited transcription with 50-file uploads. The trade-off is a subscription commitment — you pay whether you use it or not. TurboScribe caps each upload at 50 files, so larger batches require multiple upload rounds.
AssemblyAI offers the lowest per-hour rate at $0.15/hr, but it's an API-only service. You need a developer to write code that sends files, manages job status, and retrieves results. Speaker diarization costs an additional $0.02/hr. This is the right choice for engineering teams building transcription into their own products, not for teams that just need transcripts.
Rev.com charges $0.25 per audio minute for AI transcription — roughly $15 per hour of audio. They also offer human transcription at $1.99/min for situations that demand manual accuracy. Rev supports bulk upload via ZIP files up to 20GB.
Otter.ai is designed primarily for live meeting transcription, not bulk file processing. File imports are capped at 3 per month on the free plan and 10 per month on Pro ($16.99/month). Business plans ($20/month annual) offer unlimited imports. Otter.ai supports English only.
BrassTranscripts charges per file with automatic volume tiers — no subscription, no monthly commitment. Speaker identification is included at every tier. There's no per-upload file cap, and the web dashboard handles everything without API setup. You pay only for the files you process, only when processing is complete.
Built-In Safeguards for Large Batches
When you're uploading 50 or 100+ files at once, mistakes are inevitable. Files get named wrong, recordings contain no speech, or the same file gets selected twice from different folders. Our bulk system catches these issues before they cost you money.
Silent file detection
Not every audio file contains usable speech. Field recordings might capture only ambient noise. Surveillance footage might have audio enabled but no conversation. Equipment test recordings or music-only tracks produce zero transcribable words.
When our system processes a file and detects no spoken words, it automatically flags the file as "No speech" on your dashboard. Silent files are not billed and do not count against your file limit. You don't need to contact support or dispute a charge — the system handles it automatically.
Duplicate filename detection
Selecting 50+ files at once makes it easy to accidentally include the same recording twice — same filename from different folders, or the same file dragged in during a second upload round.
The dashboard checks for duplicate filenames (case-insensitive) within your current batch before processing starts. Duplicates are flagged with an amber "Duplicate" badge and a summary notice telling you how many were detected. You can review and remove duplicates before starting processing, preventing you from paying twice for the same recording.
Failed file handling
If a file fails during processing — due to a corrupted file, unsupported codec, or processing error — it is not included in your checkout total. You can retry failed files before paying, or pay for the completed files and handle failures separately. Either way, you never pay for a file that didn't produce a usable transcript.
For a real-world example of these safeguards in action, read how 102 legal audio files shaped our bulk service — including two silent highway camera recordings that were automatically excluded from the invoice.
Frequently Asked Questions
How do I transcribe multiple audio files at once?
BrassTranscripts bulk transcription starts with creating an account at brasstranscripts.com/bulk/signup. After email verification, users receive a dashboard link. Upload files, click Start Processing, and pay securely when complete. No approval needed — self-service from start to finish.
Is there a minimum file count for bulk transcription?
No minimum file count is required. Any batch size is accepted. Batches of 1-19 files are charged a $90 flat fee. Volume pricing applies automatically for 20+ files — see the pricing table in this guide for exact per-file rates.
What audio formats does bulk transcription support?
BrassTranscripts bulk transcription supports all standard audio and video formats: MP3, MP4, M4A, AAC, WAV, FLAC, OGG, Opus, WebM, MPEG, and MPGA. Maximum 250MB per file, up to 2 hours per recording. Transcripts are delivered as TXT files with speaker labels.
Does bulk transcription include speaker identification?
Yes. Every file in a BrassTranscripts bulk transcription batch includes automatic speaker identification at no extra cost. Speakers are labeled throughout the transcript, the same as the standard single-file service.
How does BrassTranscripts bulk compare to TurboScribe?
BrassTranscripts bulk is pay-per-use with no subscription required. TurboScribe charges $10/month (annual) for unlimited transcription but caps uploads at 50 files at a time. Both include speaker identification. BrassTranscripts has no per-upload file cap and supports 99+ languages vs TurboScribe's 98+.
Do I need an API to batch transcribe audio files?
No. BrassTranscripts bulk transcription uses a web-based dashboard — upload files with drag-and-drop, no code required. API-based services like AssemblyAI exist for developers who need programmatic access to batch transcription at scale.
How to Get Started
- Create an account — email verification takes about a minute
- Open your dashboard link and upload your files
- Click Start Processing — all files run concurrently
- Pay securely at checkout and download your transcripts as a ZIP
Your account carries over between batches. Each payment unlocks 100 additional file slots automatically. See the full step-by-step guide for detailed instructions on uploading, processing, and downloading. For a real-world example of bulk transcription in action, read how 102 legal audio files shaped our bulk service.
See our Terms of Service for full details on access, pricing, and download terms.
Related Posts:
- AI Transcription for Nonprofits — Bulk transcription for nonprofit organizations