OPUS to PRC Converter

Create Psion Record audio from OPUS files online

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Psion Device Format

PRC works on Psion EPOC organizers — convert OPUS audio into files these vintage PDAs can play.

Online Conversion

No Psion SDK needed — create PRC files from OPUS directly in your browser.

Vintage Compatibility

Produce genuine PRC audio files compatible with original Psion hardware and emulator software.

How to convert OPUS to PRC

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose prc or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your prc file right afterwards

About formats

Opus is a versatile, open audio codec standardized by the IETF as RFC 6716 in 2012. It fuses two coding approaches — SILK for speech and CELT for music — into one algorithm that blends between them based on content type and bitrate. This hybrid design lets Opus outperform virtually every other codec across a wide range of uses: low-latency voice at 6 kbps, high-fidelity music at 128 kbps, and everything in between. It supports bitrates from 6 to 510 kbps, sample rates up to 48 kHz, and frame sizes as small as 2.5 ms, giving it the lowest algorithmic latency of any mainstream audio codec. Three advantages make Opus especially compelling. It is completely royalty-free and open-source, removing licensing barriers that hold back proprietary codecs. It achieves transparent quality at roughly half the bitrate of MP3 and beats AAC at equivalent rates. And its low latency makes it the mandatory codec for WebRTC, so every modern browser ships with an Opus decoder. WhatsApp, Discord, Zoom, and YouTube all rely on Opus for real-time audio.
Initial release: September 11, 2012
PRC is an audio file format associated with Psion) handheld organizers, particularly the Series 3 and Series 5 lines from the 1990s. These pocket computers included built-in microphones and basic voice recording capabilities, storing captured audio in the PRC container. The encoding is typically ADPCM-based (Adaptive Differential Pulse-Code Modulation), balancing file size against audio intelligibility given the severe storage constraints of early PDAs — the original Psion Series 3 had just 256 KB of RAM doubling as storage. PRC audio is generally mono at low sample rates (often 8 kHz), optimized for speech rather than music. One advantage was tight integration with the EPOC operating system (later evolving into Symbian), letting users embed voice notes directly in agenda entries and database records. The compact file sizes — a minute of speech consumed only a few kilobytes — made it feasible to store dozens of memos on devices with minimal memory. While PRC audio is a legacy format today, conversion tools exist for extracting recordings from archived Psion devices, which remain collectible among retro computing enthusiasts.
Developer: Psion PLC
Initial release: 1993

Frequently Asked Questions

Why convert OPUS to PRC?

PRC is the audio recording format for Psion EPOC PDAs. Vintage Psion collectors and enthusiasts need PRC files for device playback.

What reads PRC?

Psion Series 5, Psion EPOC-based organizers, and Psion emulators play PRC audio files natively.

Is PRC a modern format?

No — PRC is legacy. It exists for vintage Psion device support and retrocomputing preservation.

What audio quality does PRC offer?

PRC stores compact audio matching the capabilities of Psion hardware — limited fidelity by modern standards.

Can I convert multiple files?

Upload several OPUS files and produce PRC output for each in one batch.