Syxloom: MIDI SysEx
Patch Bench, Diff & Devices
$3.99 · Designed for iPad. Not verified for macOS.
Syxloom is an offline MIDI System Exclusive workbench for synthesists, repair benches, studios, and anyone keeping older hardware alive.
Capture a dump, see exactly what arrived, split it into the patches that matter, and send back precisely what you choose — with the byte-level detail a service manual assumes you have.
THE BENCH
- Send sets: ordered selections from your library sent as one paced transfer
- Per-set message gap, with a wire-time estimate before you commit
- Byte-level diff of any two messages: changed regions by offset, aligned hex
- Sets survive renames — they reference entries, not copies
CAPTURE
- Finds every CoreMIDI source: USB interfaces, Bluetooth MIDI, virtual ports, network sessions, and other apps on this device
- Reassembles dumps that arrive across many MIDI packets
- Keeps interleaved clock and active-sensing bytes out of the payload
- Flushes stalled transfers so a failing cable is visible, not silent
- Live receive meter: bytes per second, as it happens
DEVICES
- Census: broadcast the Universal Identity Request, and every reply becomes a card naming manufacturer, family, member code, and firmware version
- Request builder: Roland RQ1 with the checksum computed over address and size; a raw hex composer that validates 7-bit data before sending
- Pacing profiles: per-device transmit gaps, set once and remembered
INSPECT
- Manufacturer identification from the full published one- and three-byte ID registry, with regional grouping
- Universal message decoding: identity, GM state, master volume, and more
- Roland and Yamaha checksum verification, with the failing byte named
- Structural checks: framing, 7-bit violations, truncation, declared lengths
LIBRARY
- Name, tag, and annotate every message; instant search across all of it
- Import .syx files, paste hex straight from a service manual, export and share anything
Everything is stored on this device. No account, no ads, no analytics, no network calls. Your patches are yours.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The Patch Bench update.
BENCH — a captured bank is no longer all-or-nothing. Build send sets: ordered selections from your library, delivered as one paced transfer with a per-set gap between messages. Reorder by drag, and the wire-time estimate updates as you build.
DIFF — compare any two messages or captures byte by byte: changed regions named by offset, an aligned hex view, and a one-line verdict.
DEVICES — run a census: Syxloom broadcasts the Universal Identity Request and turns every reply into a card naming the manufacturer, family, member, and firmware. A request builder composes Roland RQ1 messages with the checksum computed for you, plus a raw hex composer that validates before it sends. Per-device pacing profiles remember how slowly old hardware needs to be fed.
Also: a live receive meter on the Monitor, a new icon, and a new instrument-panel look across the app. Everything stays on this device — no account, no tracking.
The developer, Robert Corbin, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Robert Corbin
- Size
- 2.3 MB
- Category
- Music
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Shadowfetch

