rossum-electro/locutus

Locutus

Rossum Electro-Music

MIDI mediator expander for the Rossum Assimil8or sampler; translates MIDI notes, velocity, CC, and program change messages into multichannel modulation and polyphonic triggering for Assimil8or, and can echo Assimil8or CV inputs back out as MIDI CC data.939

Capabilities 3

Expanderexpander
Connects to the Assimil8or CPU via a dedicated 5-wire ribbon cable; draws power from Assimil8or rather than the Eurorack bus.939
MIDI to CVmidi-to-cv
Converts MIDI note, velocity, CC, channel pressure, and program change messages into modulation and trigger signals for the Assimil8or sampler via a dedicated ribbon cable connection.939
Polyphonicpolyphonic
Dynamic and Multi assignment modes enable polyphonic and multitimbral playing of Assimil8or channels from MIDI controllers and sequencers.939

Jacks 2 (1 in / 1 out)

NameSignalVoltageDescription
Inputs (1)
MIDI INmixedAccepts MIDI data from controllers, sequencers, or other MIDI sources to drive Assimil8or modulation and triggering.939
Outputs (1)
MIDI OUTmixedTransmits MIDI program change messages when presets change locally, and can send CV-to-MIDI CC data based on Assimil8or's analog CV inputs.939

Parameters 11

NameTypeRangeBehavior
ASSIGNMENTmenu_settingSelects the assignment mode that governs how incoming MIDI notes map to Assimil8or channels and zones, and how notes offset pitch.939
CV Amenu_settingSelects which MIDI CC number or block is substituted for or echoed from Assimil8or's CV A column inputs.939
CV Bmenu_settingSelects which MIDI CC number or block is substituted for or echoed from Assimil8or's CV B column inputs.939
CV Cmenu_settingSelects which MIDI CC number or block is substituted for or echoed from Assimil8or's CV C column inputs.939
Index Base Keymenu_settingSets the lowest MIDI note number used as an index key in Indexed KZ assignment mode; 8 successive keys starting from this note select Assimil8or zones 1–8.939
MESSAGE NOTIFICATIONSmenu_settingWhen ON, shows incoming MIDI message details on Assimil8or's display; when OFF, only the MIDI In LED lights for activity.939
MIDI Modemenu_settingSelects the MIDI channel reception mode: Omni (all channels), Uni (Basic Channel only), or Multi (Basic Channel through Basic Channel +7).939
PITCH WHEEL RANGEmenu_setting0semitone – 12semitoneSets how much MIDI Pitch Wheel events offset pitch; the range spans from no offset to plus or minus 12 semitones.939
RECEIVE PROGRAM CHANGEmenu_settingDetermines whether MIDI program change messages are ignored, acted on only for existing presets, or acted on for all preset slots including empty ones.939
TRANSMIT PROGRAM CHANGEmenu_settingWhen ON, Locutus sends a MIDI program change out when the preset is changed on Assimil8or; when OFF, no program changes are transmitted.939
VELOCITY DEPTHmenu_setting0 – 127Controls how much MIDI velocity attenuates output level; 0 disables attenuation, and 127 allows up to -96 dB of attenuation scaling linearly.939

Firmware history 1 version

VersionReleasedNotes
3.022024-04-03Introduces Indexed KZ assignment mode and Index Base Key parameter; Zone Lock now works per-channel and interacts with MIDI Multi mode; fixes bug preventing linked channels from transposing with MIDI note data; includes various minor tweaks and fixes.939

References 3

  1. [939]
    Locutus MIDI Referencemanual
    verified 2026-05-24
  2. [940]
    Locutus Quick Start / Install Guidemanual
    verified 2026-05-24
  3. [941]
    Rossum Electro-Music Locutus product pageproduct_page
    verified 2026-05-24