What’s new

1. Version 5.52

   June 2026

   Version number only

   • Roland changed the version number for internal reasons. Nothing about the product changes.

2. Version 5.51

   April 2026

   Bug fixes

   • Fixes a system hang in certain operations.
   • Restores the icon for moving up to the parent folder when you select a folder.

3. Version 5.50

   April 2026

   Side chain compression

   • Adds side chain compression. In the guide →
   • Adds support for SDXC cards formatted as exFAT. In the guide →

   + bug fixes

4. Version 5.01

   July 2025

   Two new system settings

   • Adds App Auto Connection and Start-up Screen to the general system settings. In the guide →

5. Version 5.00

   April 2025

   Control Serato from the 404

   • Operates Serato DJ from the unit. In the guide →
   • Operates Serato Studio from the unit. In the guide →
   • Shows how a resample is set to start while you resample. In the guide →
   • Lets you pick a sound generator to trigger a resample.
   • Assigns transmitted MIDI CCs to CTRL 1–CTRL 3. In the guide →
   • Makes skip-back sampling available in DJ mode, in PAD MODE. In the guide →
   • Changes the startup screen.

   + bug fixes

6. Version 4.07

   November 2024

   Bug fixes

   • Fixes several samples imported together all becoming the same sample.
   • Fixes sample name edits not saving in some cases.

   + bug fixes

7. Version 4.06

   October 2024

   Import progress in DJ mode

   • Shows a progress bar while DJ mode imports samples from the SD card. In the guide →

   + bug fixes

8. Version 4.05

   May 2024

   Bug fixes

   • Fixes crashes when sampling or resampling after an import.
   • Fixes multipad export not using the selected pattern, and exported project folders all taking the same name.
   • Includes SP-404MKII App fixes.

   + bug fixes

9. Version 4.04

   April 2024

   The big one: looper, sound generator, groove

   • Adds the looper. In the guide →
   • Adds the sound generator. In the guide →
   • Adds groove. In the guide →
   • Adds multipad export. In the guide →
   • Lets you bounce pattern chains. In the guide →
   • Lets you operate Koala Sampler from the unit. In the guide →
   • Adds Microscope to TR-REC. In the guide →
   • Adds tap recording to TR-REC. In the guide →
   • Adds sample merge. In the guide →
   • Adds renaming. In the guide →
   • Imports SP-404SX and SP-404A projects. In the guide →
   • Loads project files directly from the SD card. In the guide →
   • Imports samples from the SD card in DJ mode. In the guide →
   • Records rolls into patterns. In the guide →
   • Adds the DJFX Delay effect. In the guide →
   • Adds Filter+Drive, Resonator, Delay, Isolator and DJFX Looper to MFX. In the guide →
   • Adds per-sample pad colours. In the guide →
   • Needs version 4 or later of the SP-404MKII App, so update both together. In the guide →
   • Also brings smaller additions, such as sampling lengths in measures, more chromatic scales and roll intervals, and Bank Mute.

   + bug fixes

Full details, including every bug fix, are in Roland’s update history .