WAV to SD2 Converter

Convert WAV to Sound Designer 2 format online

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Pro Tools Legacy

Produce SD2 files from WAV — the format legacy Digidesign and Pro Tools systems were designed around.

Loop Point Support

SD2 supports embedded region markers and loop points — metadata that WAV files do not carry natively.

Lossless Conversion

Both formats store PCM audio. The WAV to SD2 conversion is a container swap — no quality loss, no re-encoding.

How to convert WAV 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

WAV (Waveform Audio File Format) is an uncompressed audio container jointly developed by Microsoft and IBM, first published in August 1991 alongside Windows 3.1. Built on the Resource Interchange File Format (RIFF), WAV stores audio data — most commonly as linear pulse-code modulation (LPCM) — together with metadata describing sample rate, bit depth, and channel count. This straightforward structure has made WAV the de facto standard for uncompressed audio on Windows and a universally accepted interchange format across virtually every operating system, audio editor, and media player in existence. CD-quality WAV files use 16-bit samples at 44.1 kHz stereo, while professional workflows routinely employ 24-bit or 32-bit float samples at rates up to 192 kHz. A major advantage is zero-loss fidelity: because standard WAV applies no compression, the stored data is an exact digital representation of the original recording, making it the preferred choice for mastering and archiving. WAV also supports embedded metadata through INFO and BWF chunks, enabling timestamping and production notes. The main trade-off is file size — one minute of CD-quality stereo occupies roughly 10 MB — and the 32-bit RIFF structure imposes a 4 GB limit, though RF64 removes that ceiling.
Developer: Microsoft and IBM
Initial release: August 1991
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 WAV to SD2?

SD2 was the native audio format for Digidesign hardware. Legacy Pro Tools sessions and archival projects may require SD2 instead of WAV.

What opens SD2 files?

Older Pro Tools versions, Sound Designer II software, Audacity, and SoX can read SD2 files — primarily on macOS.

Does SD2 offer advantages over WAV?

SD2 supports embedded loop points and region markers — metadata useful for sample editors that WAV does not carry natively.

Is the conversion lossless?

Yes. Both formats store uncompressed PCM audio. The conversion is a lossless container change.

Can I convert a multitrack session?

Upload all your WAV tracks and batch-convert them to SD2 — prepare a full legacy Pro Tools session efficiently.

WAV to SD2 Quality Rating

3.8 (10 votes)
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