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Teenage Engineering has just announced OP-XY OS 1.2.0 update, its biggest firmware update since its launch.

The firmware 1.2.0 update adds a new drum synthesizer called drumline, multichannel audio over USB–C, a new dynamic filter, a detune parameter, expanded envelope controls and more.

Drumline is a new drum synthesizer featuring ten different drum models, covering everything from kicks, snares, and hi-hats to congas, shakers, and claps. each drum model comes with four dedicated parameters, along with additional sub-parameters, giving you deep sound design controls.

Drumline comes with a new envelope, designed for more expressive drum programming and performance. adjust attack and length, introduce rhythmic variations with the funk parameter, or add randomization to every sound on every hit. use it to bring more movement and variation to your drum patterns.

The new dynamic filter combines a high-pass and low-pass filter with compression and drive. use it with drumline to shape transients, add punch and create heavier drum sounds, or apply it to other sound engines to add depth and character.

OS 1.2.0 introduces three USB audio output modes: a standard two-channel stereo output, a customizable two-channel output for compatibility with devices that require stereo audio, and a fully customizable eight-channel output.

The eight-channel mode includes four preset routings and four user-programmable routings, allowing you to send individual instrument and auxiliary tracks over USB–C. making it easier to record separate stems directly into your DAW for further mixing and production, and offering more flexibility for external routing when performing live with OP–XY.

A new detune parameter has been added to the preset settings, giving you even finer control of the synth engines in OP–XY. use it to introduce subtle pitch variations, and create patches with a more analog character.

Teenage Engineering OP-XY 1.2.0 Firmware Update Guide:

New Update Features:

• multi channel USB audio
• new drumline drum synth engine
• new dynamic track filter with drive
• new detune preset setting
• improved bootloader security

Find out more on Teenage Engineering site.

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The world of alternate firmware for synths is rapidly expanding – and it’s bringing new features to synths that are still in production.

The latest example is prophet-rev4-mods, a free alternate firmware for the Sequential Prophet-5 and Prophet 10 Rev4 line that adds an arpeggiator, polyphonic step sequencer, octave shifting and patch-level sequence memory.

The project is designed to expand the Rev4’s performance capabilities without requiring hardware modifications.

Features:

• Adds an arpeggiator to the Sequential Prophet-5 Rev4 and Prophet-10 Rev4 firmware.
• Offers Up, Down, Up/Down, Random and Assign arpeggiator modes.
• Supports arpeggiator patterns spanning one to four octaves.
• Provides adjustable tempo from 40 to 300 BPM, with both knob control and tap tempo.
• Supports external MIDI clock synchronization.
• Offers a range of note divisions, including dotted, triplet and swing settings.
• Includes a HOLD latch with re-latch behavior for changing held notes or chords.
• Adds a polyphonic step sequencer with up to 512 steps.
• Sequences chords of up to 10 notes, retaining the velocity of recorded notes.
• Supports rests and ties, along with recording from the keyboard or MIDI input.
• Provides forward, backward and pendulum playback directions.
• Allows sequences to be transposed from the keyboard.
• Can route a recorded chord sequence through the arpeggiator, turning it into a changing chord progression.
• Adds a front-panel keyboard octave shift of plus or minus two octaves, also affecting arpeggiator operation and MIDI output.
• Saves arpeggiator settings and recorded sequences with user programs.
• Uses existing front-panel controls rather than adding external controllers or modifying the hardware.
• Can be bypassed at startup, allowing the synthesizer to operate with its standard behavior when the patch is inactive.
• Applies to the official Main OS 2.1.0 file through a browser-based patcher and installs using the standard SysEx update process.

The prophet-rev4-mods project is available free of charge from GitHub under the MIT license. Users need Sequential’s official Main OS 2.1.0 firmware file and a MIDI SysEx transfer utility to create and install the patched firmware. The repository provides installation instructions and a method for restoring the original official firmware.

The project is not affiliated with Sequential. The author reports testing the modification on a Prophet-10 Rev4 in October 2026, while the Prophet-5 Rev4 remains untested on hardware. Users should review the repository’s documentation, risks and recovery requirements before installing the patch.

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MicroFreak, now a SuperFreaker.

Freakier Firmware has announced Superfreaker – unofficial alternate firmware for the Arturia Microfreak synthesizer that adds new effects, performance features and more.

Superfreaker – now in beta – promises to add Drive, Lo-Fi, a tape echo, a separate Release, Legato Glide, a metronome, transpose, Shift latch and more.

Visit the Freakier Firmware site for details.

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