Fisher English

by LDC

2000h of telephone conversations — scaled-up successor to Switchboard.

TL;DR

2000h of telephone conversations — scaled-up successor to Switchboard.

Best for conversational English ASR training at scale. Pricing: paid.

Category
Open source
License
—
Stars
—
Last push
—
Pricing
paid
Platforms
LDC

What it is

Fisher English Parts 1+2 (LDC2004S13/LDC2005S13) is ~2000 hours of US English conversational telephone speech — the standard high-quantity conversational-ASR corpus. LDC paid.

Best for: Conversational English ASR training at scale.
Watch out for: LDC license · paid · 8 kHz telephone speech. Cite: Cieri et al., LREC 2004.

Install / use

https://catalog.ldc.upenn.edu/LDC2004S13  # LDC membership

Features

Speaker diarizationYes
Word-level timestampsNo
Streaming / real-timeNo
Languages supported1
HIPAA eligibleNo

Fisher English vs Whipscribe

FeatureFisher EnglishWhipscribe
CategoryOpen sourceTranscription APIs
Pricingpaidfree beta
Speaker diarizationYesYes
Word timestampsNoYes
StreamingNoNo
Languages199
PlatformsLDCWeb, API, MCP

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Whipscribe is a managed faster-whisper + whisperX service. If you want transcripts without running infrastructure, paste a URL or drop a file in the form below — you'll have a transcript in seconds.