SKU: 57084227397

Chronovore, 24HP CV/Gate Sequencer

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Description

Chronovore, 24HP CV/Gate SequencerChronovore is a CV Gate Sequencer based on the TB 303. The circuit was faithfully recreated with modern components in a small form factor suitable for eurorack. The device includes the Pixie u650 CPU which runs an emulation of the original 303 mask ROM for a genuine 303 experience. Since the hardware is identical to the 303 sequencer, other CPUs such as the Quicksilver or Sonic Potions are also compatible (but not supported). Features: Accent, Gate,

 

Chronovore is a CV/Gate Sequencer based on the TB-303.  The circuit was faithfully recreated with modern components in a small form factor suitable for eurorack.  The device includes the Pixie u650 CPU which runs an emulation of the original 303 mask ROM for a genuine 303 experience.  Since the hardware is identical to the 303 sequencer, other CPUs such as the Quicksilver or Sonic Potions are also compatible (but not supported).

 

Features:

  • Accent, Gate, CV Outputs
  • Clock in (24 PPQN) and Run (active High) Inputs for sync
  • MIDI Input for MIDI sync and start as supported on Pixie, TRS A or B (universal)
  • Adjustable slide time, stock, long, longer, and REALLY long
  • Digital controlled Bank/Function controls with display (pattern groups are displayed as A-D instead of I-IV)

Please Note:
This device uses PSIpower and has NO POLAIRTY on the power header, it can be installed EITHER WAY 

 

24HP, 25mm Deep

Current Draw: +12 65 mA, -12V 0 mA

 


 

 

Preliminary Operating Instructions:

 

A: Pattern/Track Write/Play mode selection

Instead of  two big rotary switches on the 303, we have a display and buttons to switch between the 4 modes.  Pressing a button once will put you into PLAY mode, pressing it again will put you into WRITE mode for the corresponding mode (TRACK/PATTERN).  The LED above the button will stay ON when in PLAY mode and flash when in WRITE mode.  The display will show the numbers 1-6 for TRACK mode banks and ABCD for PATTERN mode banks.

B: MIDI Connection

The pixie processor supports MIDI SYNC only at this time, to activate midi sync, you press the FUNCTION and CLEAR buttons on the keyboard at the same time (this will trigger the settings mode) and the sync button is toggled with the time mode button (the LED will be on or off depending on the mode).  The sequencer can then be started from a midi sequencer that sends a start/stop command and the internal tempo is disabled.  Pressing the function button will exit out of the settings mode

C:  Analog sync functions

The DINSYNC functionality is unchanged from the 303 but the routing is expanded to make it more flexible in a modular setting.  The two sync inputs (RUN and CLOCK) are normalled to the internal clock so without anything plugged in, the device runs as SYNC master, just like the 303.  Plugging anything into those ports slaves the device to incoming sync (this MUST be DINSYNC/24PPQN positive clock for the clock and a RUN HIGH/OFF LOW run signal).    Since there are two inputs instead of one cable on the 303, those two signals do not have to be both used at the same time so you could slave the clock and still use the panel start/stop or vice versa.  There is also a switch on the back of the device that converts those two ports to sync OUTPUTs that send clock and start info (just like plugging in the DIN cable halfway on a 303)

D: Adjustable slide time

The slide circuit has 4 different slide times available.  OFF is the stock TB-303 slide time and then the LEDs cycle between the 3 others which get progressively longer

Beyond that, please refer to the TB-303 instruction for sequencer operations.  Great care was taken to make sure that old NEC part behavior is accurate and if you've used a TB before, it will be very familiar, very quickly. 
The Roland TB-303 Manual can be found here


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SKU: 57084227397

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★★★★★ 3
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Reviewed in the United States on February 24, 2026
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A. O.
Louisville, US
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Small and detailed.
This is a nice addition to a library shelf. Size is about as big as a grapefruit. Nice detail and solid white. Shipped securely in styrofoam.
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Reviewed in the United States on January 4, 2021
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Amanda
Belleville, US
★★★★★ 5
A good read
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A good read, just fluffy cuteness, no antagonism. I like all the characters. It could have used another round of editing however, glanfds being one error that cracked me up, and my personal pet peeve was that the author kept using the word fill instead of feel, which I promise you are not interchangeable haha, but it's definitely better than the majority of books I read on here mistake-wise.
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amazing
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Tara
Whiting, US
★★★★★ 3
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