What is the latest firmware version for the Soundcraft Si Expression?

The newest Soundcraft Si Expression firmware in this archive is v1.7.

Where can I download older Soundcraft Si Expression firmware?

Every version we have archived for the Soundcraft Si Expression stays on this page, including superseded releases that Soundcraft has removed from its own site. Downgrading is sometimes necessary when a show file or a networked device expects an earlier release.

How do I check a Soundcraft Si Expression firmware download is genuine?

Every file lists the SHA-256 checksum recorded when we mirrored it, alongside a link to the original Soundcraft source URL. Run shasum -a 256 on the downloaded file and compare it to the value shown before you load it onto a console.

Soundcraft

Si Expression Firmware

Name: Soundcraft Si Expression
Brand: Soundcraft

✓ MSA-compatibleSHA-256 verified 1 version archived

Soundcraft Si Impact digital mixing console control surface — Soundcraft Si series — pictured: Si Impact.

Firmware status

Is your Si Expression out of date?

All Versions

Every archived Soundcraft Si Expression firmware release, newest first, with checksum, size, release date and original source.
Version	Download	SHA-256	Size	Release Date	Source & Archive	Release Notes
v1.7 Latest	File not archived yet	4808b4ad3b432690ca2cc6859390661e4af7ab8100af78f085f4fa16f9459298	3 MB	—	Original source Archived 2026-06-17	Notes

Background

About the Soundcraft Si

Si Compact, Si Expression, Si Impact and Si Performer put Soundcraft's processing into fixed-format frames for installation, house-of-worship and small-venue work. Si Impact adds a 32-in/32-out USB interface; Si Performer adds DMX lighting control. Firmware is loaded from USB media.

How Soundcraft ships firmware

Ui-series updates are applied through the browser interface itself, while Vi and Si consoles are updated from USB media. Soundcraft rotates older downloads off its support pages fairly quickly, which makes an independent mirror genuinely useful for anyone maintaining an older desk.

Verifying what you download

Every Soundcraft Si Expression file in this archive lists the SHA-256 checksum recorded the moment we mirrored it, plus a link to the original Soundcraft source URL. Before loading firmware onto a console, run shasum -a 256 <file> (macOS/Linux) or certutil -hashfile <file> SHA256 (Windows) and compare it to the value in the table above. If they differ, do not load the file. More on how this archive verifies files →

mixerfirmware.com is an independent archive operated by BoxCast — not affiliated with, endorsed by, or acting on behalf of Soundcraft. For current products and official support, see Soundcraft’s website.

Also known as

si expression, siexpression, soundcraft si expression

Mixing Station Anywhere support

Firmware V1.8 supported by Mixing Station Anywhere. See HiQNet guide / limitations

Auto-detect & upgrade with MSA →

More Soundcraft firmware

All Soundcraft models →

Si Expression Firmware

Is your Si Expression out of date?

Soundcraft Si Expression firmware versions

About the Soundcraft Si

How Soundcraft ships firmware

Verifying what you download