modular analog synthesizer for electronic music
Home Prices Books Technical Site Map
Comments About Links Shirts Banner
Artists Humor Sounds Future Cables
Forum SynthInvent Gallery Brochure Custom
WIKI DIY Entry Sys WebCam Resources
Facebook Calendar Power Datasheets MOK
 Q960 Sequential Controller
 

Click Image for Large View 

Click here to see a large image

Compare the Q119 and Q960 Sequencers

The Q960 Sequential Controller is a recreation of Bob Moog's famous 960 module. Built using modern components yet retaining the 960's unique functionality including the highly sought-after skip function, 3rd row timing control, trigger in/out for each stage, etc. The Q960 consumes 8 spaces (17" wide) just as the Moog 960, and uses the standard Synthesizers.com power supply (+15,-15,+5).

The Q960 is an 8 stage, 3 row sequencer with an internal oscillator. Each row can control any voltage-controlled module such as an oscillator, filter, etc. A 9th stage provides a place for the sequencer to stop. A lamp for each stage indicates when it's active.

The front panel is divided into 3 sections: Oscillator, Stages, and Output. Each stage has 3 knobs which determine the voltage at the 3 row outputs (A, B, C). The row outputs can be scaled using the 'X' switches (X1, X2, X4). A mode switch for each stage selects Skip, Normal, or Stop. A trigger (Gate) input signal will select a particular stage, as does the manual push button. A trigger (Gate) output signal is available when a stage is active.

The oscillator has 6 ranges and a variable control. A lamp indicates when the oscillator is on. Both manual and Triggers (Gates) can control the oscillator's on/off condition. Voltage control of the oscillator frequency is also available with an accurate temperature compensated 1V/Octave response. An external shift input and manual button provide additional control of stage activation.

Learn About Gates and Triggers Here

Related Modules
Q960 Sequential Controller
Q961 Sequencer Interface
Q962 Sequential Switch
Q963 Trigger Bus

Controls and Connectors

    Oscillator Lamp
      Indicates the on/off condition of the internal oscillator.
    Oscillator Range
      Selects one of 6 oscillator frequency ranges.
          Range 1: .05Hz - .46Hz
          Range 2: .13Hz - 1.2Hz
          Range 3: .5Hz - 4.7Hz
          Range 4: 2Hz - 19Hz
          Range 5: 8Hz - 75Hz
          Range 6: 31Hz - 280Hz
    Frequency Vernier
      Variable control of oscillator frequency. Approximately a 1 to 9 range.
    Oscillator On/Off Buttons
      Manual control of oscillator operation.
    Oscillator On/Off Inputs
      Voltage control of oscillator operation. Typically a gate (trigger) signal, Oscillator square wave, etc.
    Oscillator Voltage Control Input
      Voltage control of oscillator frequency. 1 Volt per octave, temperature compensated.
    Oscillator Output
      Pulse wave oscillator output with a 90% (Default) duty cycle. 0-5 volts.
    Stage Lamp
      Indicates a stage is active. Normally only one stage is active at a time.
    Stage Control Knobs
      The knobs of the active stage determine the voltage at the row outputs.
    Stage Mode Switch
      Selects Skip, Normal, or Stop modes. Normal: A stage comes on, stays on for the duration of the oscillator cycle, then turns off and shifts to the next stage.
      Skip: Removes the stage from the shifting sequence.
      Stop: Prevents shifting to the next stage. The oscillator remains on.
    Stage Set Buttons
      Allows manual selection of a stage and resets the other stages.
    Stage Trigger Inputs
      Trigger (Gate) input signals cause stage selection and others to reset. This can be a keyboard gate, a pulse from an oscillator, a trigger output from another stage or sequencer, etc.
    Stage Trigger Outputs
      When the stage is active, a trigger (Gate) output is available at this jack. The output stays on as long as the stage is on.
    Stage 9
      A special 'Stop' stage where zero volts is sent to row outputs. Stage 9 can be Skipped with the mode switch, activated manually with the Set button or activated with a trigger input. Stage 9's trigger output is available as long as the stage is active (Lamp on). Whenever stage 9 becomes active, the oscillator is automatically turned off.
    Row 'X' Switches
      Determines the range of the control knobs for each of the 3 row outputs. X1 = 0-2 volts, X2 = 0-4 volts, X4 = 0-8 volts.
    Outputs
      2 outputs provide the voltage of the selected stage control knobs.
    3rd Row Control of Timing Switch
      Routes the output of the 3rd row to the oscillator to control frequency. When a stage knob is set to 0, there will be no affect on the oscillator frequency. Each volt output will double the oscillator frequency resulting in a halving of the stage On time. Row C's X switch does affect this.
    Shift Input
      Control of shifting from an external signal such as an oscillator, gate, trigger source. Can be used in conjuction with the internal oscillator for unusual timing effects.
    Shift Button
      Manual control of shifting.

Specifications
Panel Size:  Octal width 17"w x 8.75"h.
Trigger, Shift, Control Input Signals:  Fast rising 0-3 volts minimum, active high.
Output Voltage Levels: 0-8V.
Internal Oscillator:  .1 to 2Khz.+, 1V/Octave Response
External Oscillator Speed:  2Khz maximum.
Power:  +15V@120ma, -15V@30ma, +5@5ma.

Price
$800.00 US.

Optional Reset Feature

The optional Q960RF Reset Feature adds a new position to the Q960's mode switch that provides a real-time Reset position. The Reset mode position is unmarked, one click beyond the Stop setting, and causes the sequencer to reset to stage 1 when selected. The results are very musical when played during a sequence along with the Skip feature. Add this feature to your Q960 order by selecting part number Q960RF on the Order Form. Price: $80.00.

Usage and Patch Tips

Basics
The Synthesizers.com Q960 is functionally equivalent to the Moog 960 and any Moog documentation will apply. The Q960 however, has a few features that go beyond the Moog module such as the optional Reset mode, and intuitive cross-trigger patching.

For starters, you may want to read over the original Moog 960 information at Roger Luther's Moog Archives From the menu on the left, select INSTRUMENTS, then select MODULES. Don't forget to send a note to Roger Luther for his great website.

Triggers and Gates
In the Moog language, Triggers are what we call Gates today. Triggers and gates are On/Off signals that indicate an on/off event such as a keypress or stage on. Learn more about gates and triggers in this article.

Controlling Envelope Generators
Normally, the oscillator output of the Q960 is used to start an envelope generator on every stage activation. The oscillator output is fixed at 90% duty cycle (90% on, 10% off). You can also start Envelope generators using the individual stage trigger outputs. These trigger outputs are on for the entire time that a stage is on (100% duty cycle). This means that 2 adjacent stages firing the same envelope generator will create a single longer trigger when mixed together.

Combining Triggers with the Q961 Interface
Use the Q961 Interface to combine up to 12 triggers. Six trigger inputs are simply mixed together, and six have an adjustable width. The adjustable width inputs allow adjacent triggers to create independent trigger pulses.

Row Control of Stage Timing
The timing of each stage can be controlled by the 3rd row of knobs (Row C) by simply switching the '3RD ROW TIMING' rocker switch. This routes the voltage from the 3rd row back to the oscillators control voltage input. The oscillator's extra control voltage input can be used in addition to this. The X switch scales the effect. Other rows can be used to control timing by simply patching the row output back to the oscillator's control voltage input.

When the X switch is set at X1, each knob produces 0-2 volts. Since the oscillator responds to the volt per octave standard, setting the knob to the zero position causes no speed change, setting the knob to the 1 position doubles the speed of that stage, and setting the knob to the 2 position quadruples the speed of that stage. This makes timing settings easy to program.

Cross-Triggering
Cross-Triggering is the method of patching a trigger output from one stage to the trigger input of another. Exotic, non-sequential patterns can be created using multiple patches. Patches can be enabled or disabled using the Q962's switch section to create patterns that change from cycle to cycle.

Cross-Triggering carries with it unexpected results at times. For example, patching a trigger output to a trigger input that has the mode switch set to skip, causes the sequencer to reset to stage 1. This is because triggering is not a shifting operation and a stage can not be selected via a shift pulse unless the previous stage is active. A special circuit inside the Q960 resets to stage 1 when no stages are active.

In the same situation, the Moog 960 would cause multiple stages to come on at the same time resulting in useless outputs and sequences. The Q960 varies from the Moog in this regard and the results are fun and powerful.

It is possible to intentionally patch triggers so that multiple stages come on at the same time. The result is that the voltages from each active stage is summed at the output stage.

24-Stage Operation using a Q962
One of the primary purposes of the Q962 sequential switch is to alternately select between the 3 row outputs of the Q960 to effectively create a 24 stage sequence. Patch the trigger output from stage 1 into the shift input of the Q962. Patch 2 or 3 rows from the Q960 to the Q962's switch inputs. Now the Q962's output will be the 24-stage sequencer output.

Multi-Sequencer Triggering
Of course, you can patch trigger outputs and inputs between multiple sequencers to achieve truely complex and bizarre sequences.

Using the Q128 Switch to Select Cross Triggers
Use the Q128 Switch to select various triggering under voltage control. The Q128 can be controlled from any source including a keyboard, another sequencer, a Q962 switch, an oscillator, etc. The results can be amazing.

Pseudo-Random Stage Selection
Since the Q960 is a shifting style sequencer, the only way to get true random stage selection is to have a source of multiple random triggers. A similar effect can be achieved by patching the output of a Q110 Noise module into the Q960 Shift input. The result is actually random shift timing but it acts similar to random stage selection if tuned correctly.

Duty Cycle Jumper/Pot

The Q960's oscillator output is fixed at 90% like the Moog 960. Changing the duty cycle can produce profound results when controlling envelope generators.

On the circuit board there is a jumper and a 3-pin connector for a 100K pot. By removing the jumper and adding the 100K Pot, the duty cycle can be varied from 10% to 90%. The pot can be mounted to the front panel (Drilling required), mounted to a blank panel next to the Q960, or simply left hanging behind Q960 panel. This is not an option we offer and would have to be installed by the customer.

Another option is to connect a Jack TIP to the center pin (Pin 2) of the 3-pin pot connector for Voltage Control. No need to connect ground on the Jack as the panel will sufice. Make sure the jumper is ON in this situation so it will default to 90% when the external voltage control signal is removed. The voltage required is 0 - 5V. The voltage source could be a Q125 signal processor or any signal as long as you stay within 0 - 5V. Outside that range will result in 0% or 100% duty cycle. This is not an option we offer and would have to be installed by the customer.

Q960 Internal Workings & Behavior

This is a partial list of things that the Q960 does that may not seem logical.

How the Q960 works
It's important to understand how the Q960 works internally to understand what it's doing.

The Q960 is a 9 stage shift register. Each stage is linked to the next like a chain. Stage #9 is linked back to stage #1. Each stage is either ON or OFF.

Each time a shift occurs, the state of each stage is shifted forward and the last stage is sent to stage #1. In other words: a circular rotation.

Shifting can come from 3 different sources: Internal oscillator, Shift input, Shift button. You can use all 3 of these at the same time if you want. For example: patch a pulse from a Q106 oscillator into the shift input at the same time the Q960's internal oscillator is going to produce unusual patterns.

If a stage is in skip mode, that stage is removed from the chain and the previous stage is linked around it directly to the next stage. So, no matter what state a skipped stage is in, it will go OFF on a shift, and its state will not be shifted to the next stage.

There is a special circuit in the Q960 that sets stage #1 if all stages are off. This accounts for some of the anomalies where stage #1 gets set. For example, if a stage that is ON is also in skip mode, then the Q960 will reset to stage #1 upon the next shift.

Reseting to skipped stage #1
This happens if one of the stages is in Reset mode, assuming you have this feature, and stage #1 is in skip mode. When reset happens, stage #1 is set, and no further shifting occurs since there are no ON stages in the chain.

Triggering a stage that is skipped
If you ever set a stage with a trigger input signal and that stage is in skip mode, that stage will be set, but when the next shift occurs, a reset to stage #1 will occur. This is because of the circut that sets stage #1 if all stages are off, and shifting from a skipped stage results in all stages off.

Multiple stages on
There are conditions that occur where multiple stages come ON. This can happen when a trigger output is patched to multiple trigger inputs and in other cases. This is usually not useful because the output voltages are summed.