PRC to OPUS Converter

Turn PRC audio into Opus Audio format online

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Settings

Set the Opus audio bitrate per channel. If set to "Custom", the Opus audio codec supports up to 256 kbit/s per channel with a recommended range of ≥64 kbps.
Set the number of audio channels. This setting is most useful when downmixing channels (e.g., from 5.1 to stereo).
Set the sample rate of the audio. Music with a full spectrum (20 Hz — 20 kHz) requires values not lower than 44.1 kHz to achieve transparency. More info can be found on the wiki.

prc

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.
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opus

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.
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Psion PDA to OPUS

Transform PRC recordings into OPUS — bringing vintage audio into a format with real-world usability.

Universal Access

Run the converter on any operating system or device. The web-based tool adapts to your screen automatically.

Quick Processing

Lightweight source files mean near-instant conversion. Get your OPUS output in seconds, not minutes.

How to convert PRC to OPUS

1

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

2

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

3

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

About formats

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
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

Frequently Asked Questions

Why convert PRC to OPUS?

PRC is locked to obsolete Psion PDAs. OPUS makes your recordings accessible on modern devices and standard audio software.

What applications open OPUS files?

Browsers, Discord, YouTube, and Android can handle OPUS files. Most are available as free downloads for major operating systems.

How is the OPUS audio quality?

OPUS provides good quality at standard settings. The output clarity depends on the original PRC recording quality.

How fast is the conversion?

Processing is fast — PRC files are lightweight and OPUS encoding completes in seconds on our server hardware.

Are my files kept private?

Your PRC files are erased after conversion completes. OPUS downloads are purged from our servers within 24 hours automatically.

Can I convert multiple PRC files?

Yes. Upload several PRC files and convert them all to OPUS in one session. Batch processing is supported.