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Q119 24-Stage Sequencer

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Q119 24-Stage Sequencer

The Q119 Sequencer creates a series of voltages to drive other modules such as oscillators and filters. The rate is determined by an internal oscillator or an external source. Create loops of sounds, effects, arpeggios, and complex envelopes. Operation is 24 stages or 3 parallel rows of 8 stages. The Q119 can also be used as a frequency or gate divider.

Compare the Q119 and Q960 Sequencers

$560.00 USD
  • TB Wrote: Your Q119 sequencer controller is absolutely fantastic to use! I've never had so much pleasure using your system, I can not stop writing songs with your products, it is literally a lifestyle!
  • GL Wrote: I just wanted to let you know that the Q119 Sequencer is one the most innovative and delightfully challenging sequencers I've ever had the privileged of working with; and it's totally changed the face of analog sequencing for me. And combined with use of the Q960 Sequencer, I now know that there is nothing I can't accomplish where analog sequencing is concerned..
  • Panel Size:  Octal width 17"w x 8.75"h
  • Gate Signals:  0-5 volts active high.
  • Output Voltage Levels: 10V PP.
  • Control Input Levels:  0-5V.
  • Internal Oscillator:  2 to 200hz.
  • External Oscillator Speed:  1Khz maximum.
  • Gate Width Adjustment:  10% to 90% of stage On time.
  • Slew/Glide Time: 10ms to 1sec.
  • Power:  +15V@20ma, -15V@20ma, +5@50ma.
  • RS Wrote: Just got a Q119 about a week ago. I really love this sequencer, it's so full of potential. Nice build too. is a class act all the way. Thanks for being here.

Stages and Banks
The sequential controller can be configured as one bank of 24 stages, or 3 individual banks of 8 stages each. Each bank has its own voltage output which is set manually, and a gate output. The output voltage range is selectable: 0/+5 volts or -5/+5 volts. An LED indicates which stage is active.

Master Output
A master output is also provided that adds features including Glissando also known as Portamento or slew limiting, manual voltage adding, and external voltage adding, and an LED indicating the Gate output status. When in 3x8 mode (3 banks of 8 stages) the master output adds together voltages from the three output banks.

Gate Outputs
Each Bank has its own gate output (normally only used when in 3x8 mode), and there is a master gate output (normally only used when in 1x24 mode). The width of these gate signals are determined by a single front panel control. The width can be controlled from approximately 10% to 90% of the stage's on time. Individual gate outputs for each stage are not provided.

Triggering, Starting and Stopping
The sequential controller can be triggered (started and stopped) manually or by external triggers from oscillators, envelope generators, keyboard gates, etc. Several options exist including a level sensitive 'Go' input that causes the sequencer to start on the rising edge of a signal and stop on the falling edge. The 'Start' and 'Stop' signals can be used to control the sequencer with individual signals for each, or in conjunction with the 'Go' signal. This configuration gives you great control over how the sequencer behaves. For example: if you would like the sequencer to only be on when a key is pressed from the keyboard, connect the keyboard's gate output into the 'Go' input. If you would like the sequencer to start, simply press the 'Start' button. To create 3 complex envelopes in response to a key press, select 3x8 mode, and connect the keyboard's gate output into the 'Start' input, and set the 'Cycle' switch to 'Once'.

Continue or Reset Mode
The default power-up mode is 'Reset'. Whenever the sequencer is triggered with the 'Go' or 'Start' signals, the sequence will reset to stage 1 and start. There is a special, somewhat hidden mode called 'Continue' mode that can be toggled by holding the 'Set End' button and pressing the 'Manual Step' button once. This causes the sequence to continue from where it had previously stopped whenever the 'Go' or 'Start' signals trigger a sequence.

Cycles and Sequences
Front panel switches control cycles and sequences. The sequencer can generate a single cycle upon triggering, or a continuous series of cycles. The cycles can be up only (1,2,3...) or up/down (1,2,3...3,2,1).

Random Sequences
A special, somewhat hidden feature is Random stage mode. In this mode, the sequence will be random. The 'Cycle' and 'Sequence' switches are not applicable in this mode. Other controls act the same. Random mode is toggled by holding the 'Manual Step' button and pressing the 'Set End' button once.

An internal oscillator can provide control over the rate at which the sequencer moves through the stages. The operator also has the ability to manually step through the stages which is helpful when setting the stage controls. A switch is provided to select an external oscillator source which can be driven by the Q106 Oscillator, keyboard gate pulses, etc. It is possible to have each stage active for a variable amount of time by using an external Q106 Oscillator which is controlled by one of the bank outputs.

Length Selection
The number of stages in a sequence is set by a front panel push button labeled 'Set End'. Pressing this button causes the LED for the last stage in the sequence to flash. Pressing again allows the user to cycle through the stages. The last stage is set when the button is not pressed for 1 second.

Multiple Sequencers
Sequencers can be connected together to add functionality. This is accomplished by connecting the 'Done' output signal from one sequencer to the 'Start' input on another. Multiple sequencers can be set to different speeds for unusual effects or driven by the same external oscillator. Outputs of all sequencers can be mixed together or used separately.

  • Chip Wrote: I received the Q119 Sequencer. What a great combination of efficient design and good craftsmanship.


Firmware for the Q119 Sequential Controller is contained in a single 40-pin microcontroller. The chip can be removed by the user and upgraded as needed. Check the version number on your chip and request a new one. See these details on changing the chip.

Version History:
V1.0-1.2 Engineering prototype versions, 1999
V1.3 Initial production version, May 22, 2000
V1.4 Feature update , Aug 1, 2000
Improved manual step functionality.
V1.5 Current production version, March 5, 2001
Power up default to last stage of 8 or 24 depending on Mode switch.
Speed up End Stage selection timout.
Doesn't restart when changing Cycle, Sequence, or Mode Switch.

Hidden feature: Random stage mode selected by holding Manual Step and pressing Set End. This is a toggled feature, perform again to turn off random mode.

Hidden feature: Reset/Continue mode for START/GO toggled by holding Set End and pressing Manual Step. The power up default is Reset mode where the Start or Go signal will cause the sequence to reset to stage 1. In Continue Mode, the Start and Go signal will cause the sequence to continue where it left off.
Cool huh?

Important Note:
If you are updating from version 1.3 or earlier you must change the manual switch connection point
  • SG Wrote: For a recent project I really appreciated the Q119 Sequencer. The bulk of the vocals and instruments had already been recorded, but I had no problem syncing up the Q119 with Digital Performer to track some modular synth tracks towards the end. And it truly feels like a musical instrument to play! I love it.

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