Step Sequencer

The Grp R24 is a 8x3 analog step sequencer firmly based on the mighty step sequencer previously developed in Grp A8 and A4 Analog Synthesizers. The new R24 is full of control capability with CV/Gate, MIDI and USB connections. Hardware-wise, is stand-alone self powered, with hardware compatibility for mount on 5U module format; you can use in stand alone with its internal power, or you can install in your Modular system. R24 respects electrical and mechanical standards for the above manifacturers. Still, you can use R24’s own cabinet as a “presto-cabinet” for powering and using your spare 5U modules.
R24 has 128 internal memories for store and retrieve separate sequences; each sequence can be set in 8x2, 16+8 or 24 mode, with any step lenght user’s selectable.
R24 can act as CV/Gate sequencer or as MIDI sequencer, with separate rows for MIDI Note selection and for Key Velocity step adjust.
Is it possible to stack together several R24 units for long sequences in series o for more simultaneous parameter control over parallel rows.

Some more infos from Paolo (email 18.3.):
Step Parameters. Each step has CV Value freely programmable
and adjustable in real time;
can be routed to Gate 1 bus, Gate 2 bus, Off (non Gate
can be rythmically repeated in “Ratchet Mode”
selecting X2 (simple bounce),
X3 (triple bounce) or Off (no bounce); every bounce/ratchet
mode works at double or triple speed - instant TaDream...
can be used in Normal Mode, Skip Mode (step skipped for
sequence length shortened) or End Step Mode (for define the
final length of sequence)

Row Parameter. Each horizontal row has indipendent settings
for Glide time;
CV Range X2, X4, X8 octave;
Sample & Hold value On/Off (for prolonging values between
contigous steps);
Quantize On/Off (in V 1.0 you have standard semitone
quantization; next firmware revision will have several
quantizing masks user’s selectable);
Six different permutation Orders selectable; for choose the
playing/advance order of steps (the combinations previously
available only in the Grp A4 or A8 Step Sequencer, plus
several other fun modes…);
(global) selectable Step Repetition; X2, X3, X4 repetitions
before advance to the next step;
Indipendent (full) Row Repetition (useful in chain 16+8 or
24 step mode); X2, X3, X4, infinite repeat;
Each Row has indipendent Clock Divider; /2, /3, /4, /6, /8;
divider works on Internal, TTL Ext Analog and External MIDI
Clock; each row can advance at different rhythmic speed;
Row B and C can be used with their own set of parameters in
full indipendence (e.g., three different sequences in 8x3
A,B,C mode); or but you can decide to use Row A parameters
over rows A and B (useful for quick program in 16+8, A+B,C
mode); still, you can use Row A parameters over A, B and C
(useful for quick program in 24 mode, A+B+C); buttons ON on
B and C sets indipendence for Row B and C.

Row Connections on front panel. Each row has dedicated
analog connection for:
Gate Out 1 bus (internally normalled for cascading rows on
single hardware connection)
Gate Out 2 bus (internally normalled for cascading rows on
single hardware connection)
First available/active step Gate out (useful for start/stop
several sequencers network connected);
End available/active step Gate out (as above, for serial
connection of several sequencers),
CV Out (internally normalled for cascading rows on single
hardware connection)
CV Control In for Order select (a specified CV received from
external unit wil select the desidered Order for
corresponding row);
CV Control In for Row Repeat select (as above);
CV Control In for Step Repeat select (as above);
CV Control In for Clock Dividing factor select (as above);
CV Control In for Transpose (internally normalled for
simultaneusly transpose of several rows with a single
connection from exterrnal analog equipment).

Sequencer Parameter
Four-digit display for general menu parameter/value;
Dedicated display control increase, decrease, Program and
Clock selectable Internal (with its own panel control),
External Analog TTL and MIDI;
Internal Clock PW front panel control; for adjust percentage
of legato/staccato;
Advance mode Forward, Backward, FW/BW, Pendulum, Alternate,
Sequence Mode A,B,C (8x3), A+B,C (16+8), A+B+C (24);
Global Loop always disposable with dedicated control panel
(for unconditioned sequence looping);
Shift control on front panel;
Row B can be assigned to Internal Clock PW Mod or Internal
Clock Speed Mod;
Row C can be assigned to Internal Clock PW Mod or Internal
Clock Speed Mod;
Dedicated front panel controls for Run/Stop, Reset at first
step and individual Step Advance.

Sequencer Connections on front panel
Remote Run/Stop;
Remote Loop On/Off;
Remote Reset;
Remote Glide On/Off;
Analog TTL Internal Clock Out (0/+5V);
Analog TTL External Clock Out (0/+5V);
Remote CV Control In for Advance Mode select;
Remote CV Control In for Sequencer Clock Modulation;
Remote CV Control In for Sequence Mode Select;
Remote CV Control In for Sequencer Clock PW Modulation;
MIDI In & Out for sequences bulk/dump transfer, for Note
On/Off & Key Vel & Clock transmit;
USB Connection for sequences bulk/dump transfer, for Note
On/Off & Key Vel & Clock transmit.

  • ? mA +15V
  • ? mA -15V
  • ? mA 5V
  • 50 mm deep

Module is available as a DIY project only.

This Module is currently available.

$2,072 Price in €
8 HP Sequencer
submitted Jan 28th 2014, 15:46 by Radiant_man | last Change Jun 1st 2018, 23:25 by xtront

Buy Online

These merchants probably sell this module. Huh?


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