AV1 to SD2 Converter

Extract Sound Designer II audio from AV1 video

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Pro Tools Legacy

SD2 is the original Digidesign format — converting from AV1 creates audio compatible with legacy Pro Tools sessions.

Professional Quality

SD2 supports 24-bit audio at high sample rates — matching the fidelity standards of professional studio production.

Private Handling

AV1 uploads are erased right after conversion, and SD2 outputs are deleted within 24 hours.

How to convert AV1 to SD2

1

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

2

Choose sd2 or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your sd2 file right afterwards

About formats

AV1 (AOMedia Video 1) is an open, royalty-free video coding format developed by the Alliance for Open Media, a consortium whose founding members include Google, Mozilla, Microsoft, Amazon, Netflix, and Intel, among others. The specification was finalized in June 2018 with the goal of providing a next-generation video codec that surpasses the compression efficiency of H.264 and HEVC while remaining free from licensing fees. AV1 achieves roughly 30-50% better compression than HEVC at equivalent visual quality, making it particularly attractive for streaming platforms seeking to reduce bandwidth costs without sacrificing viewer experience. The codec supports a broad range of features including film grain synthesis, flexible tiling for parallel processing, content-adaptive resolution switching, and a rich set of intra and inter prediction modes. Hardware decoding support has expanded rapidly across mobile processors, GPUs, and smart TVs, addressing early concerns about computational demands during encoding. AV1 has seen wide adoption from major streaming services for delivering 4K and HDR content, and it serves as the video component of the WebM container for web-based playback. The royalty-free status makes AV1 especially important for open web standards and accessible media distribution.
Initial release: June 25, 2018
Sound Designer II (SD2) is a professional audio format created by Digidesign around 1988 as the successor to the original Sound Designer format. For over a decade, SD2 was the standard interchange format in professional recording studios, especially those on Macintosh systems. It stores uncompressed linear PCM audio at up to 24-bit resolution with sample rates used in professional production (44.1, 48, 88.2, and 96 kHz). A distinctive technical trait is its reliance on the classic Mac OS resource fork for critical metadata — sample rate, bit depth, and channel configuration — while audio data resides in the data fork. This design worked elegantly within the Mac ecosystem but created portability challenges when files moved to Windows or Unix. A key advantage was SD2's support for multiple channels in a single file and tight integration with the Pro Tools editing environment, enabling non-destructive region-based editing. The format also carried loop points and markers, making it valuable for sample libraries. As Avid Technology shifted Pro Tools toward WAV and AIFF, SD2 usage declined, but millions of legacy session archives still contain SD2 files needing occasional conversion.
Initial release: 1988

Frequently Asked Questions

Why convert AV1 to SD2?

SD2 (Sound Designer II) is the legacy Digidesign format — still found in older Pro Tools sessions and Mac audio archives.

What opens SD2 files?

Older Pro Tools versions, SoX, and Audacity can read SD2. It was the standard before AIFF and WAV took over in Pro Tools.

Is SD2 still used?

SD2 is largely superseded by WAV and AIFF in modern Pro Tools. It remains relevant for accessing legacy session files.

What quality does SD2 support?

SD2 supports up to 24-bit audio at professional sample rates — matching the quality standards of its Pro Tools heritage.

Is my data secure?

AV1 uploads are deleted immediately. SD2 outputs are removed within 24 hours.