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The Griddy

The purpose of the Griddy is to provide a way for you to control what patterns other devices are playing. It doesn't sequence notes, it sequences patterns. Typically, a Griddy will be connected to a Drumboto but it can be used with any device with a pattern input. As the Griddy runs, it will tell the attached devices to select the pattern that matches whatever the Griddy's current "step pattern output" is active. When a Drumboto is connected, you can have a different step sequence set up for each Drumboto pattern and the Griddy will be able to tell the Drumboto when it should change to a different pattern.
Here is a rundown of the controls on the front:
  • The Grid Pattern on the left side allows you to switch between different configurations for everything else on this device. Each pattern has a completely independent set of data for the rest of the controls on the device. It makes it possible for you to try different sequences without messing with something that already works. The grid pattern responds to any pattern selections that occur on the "pattern in" port on the back.
  • The Channels (1,2,3,4) are independent sequencers that do not affect each other in any way except for the fact that they all exist within a single Grid Pattern and are synchronized to step 1 when the Grid Pattern changes. Each channel also has its own set of connections in the back. The current channel is indicated by turning the channel number button orange. You can click on the channel number or any step in the channel to activate that channel.
  • The Branching Pattern Sequencer shows how the current step is configured. Buttons are lit up according to the configuration of the "go to step" values shown on the far right. The green button is the current step. The red, blue and yellow buttons show the next steps that the sequencer may choose when the next step is triggered.
  • The small LED indicators on the top and right of the sequencer section are just a reminder to show what channel and step are currently active.
  • The active channel copy/paste/reset are used to copy/paste/reset all the steps on the current channel.
  • The active step copy/paste/reset are used to copy/paste/reset the settings for the current step on the current channel.
  • Except for the Live Input, Step and Auto Step buttons, everything to the right of the sequencer steps is associated with a single step in the sequencer.
  • The Repeat dial controls how many times to repeat a step before moving to the next step. Another way to look at it is how many input triggers to ignore before moving to the next step.
  • The Countdown just shows how many triggers are remaining before it will go to the next step.
  • The Step Pattern Output is used to control which step pattern each pattern step should use. When a pattern step is active, this pattern selection is what is output on the channel pattern output port.
  • The Next Step Randomizer group is what the Griddy uses to decide what step should follow the current step when it is triggered. There are three options - red, blue, yellow. Each option has a "Go To Step" dial which can be used to dial in the step index. Most of the time you will set the "go to step" by using the buttons in the sequencer - the controller's X (blue), B (red) or Y (yellow) buttons will set the next step accordingly. Which one of the three steps is chosen randomly when the current step changes, allowing a user in Live mode to override the selection. The odds of any option being the "winner" are based on the chances value. If chances are zero, the Griddy will never select that option. This feature makes it possible for you to make sequences that have a random element to them. The winner is indicated by which one of the options buttons are lit up. You can press a different button to override the winner.
  • The Live Input button activates a special mode that allows a controller to manually control how and when the sequence steps should behave. While Live mode is active, you have the option of pressing B, X or Y to select the current winner. You can also toggle the Auto Step while Live mode is active. When Auto Step is turned off, the Griddy will repeat the current step until you presss B, X or Y and then it will switch to that step at the next trigger. You will see the "Step" button light up to match your selection, and you can press it again to turn off the step if you had enabled it by accident.


In order for the Griddy to know when to switch to the next step, it must be connected to the Drumboto's "Last Gate" output. This signal is activated when the Drumboto reaches the last step of the sequence, and when this happens the Griddy will activate the next step in the sequence. The next step in the sequence isn't necessarily just the adjacent step - it can be one of the 10 steps, or randomly choose between three of the 10 steps. This is where the "next step randomizer" comes in. This part of the panel has settings that are unique for each step.
Here is a screenshot of the minimum cabling required for the Griddy to do something useful with a Drumboto:
The above shot shows how the Griddy channel 1 pattern output is connected to the Drumboto pattern input, and the Drumboto Last Gate is connected to the Griddy's Step Trigger for channel 1. Every time the Drumboto reaches the end of the current sequence, it tells the Griddy to pick the next step in the pattern sequence. Here is what the different ports on the back of the Griddy are for:
  • Pattern In / Out - Master pattern control for the Griddy. Like all devices with these ports, the pattern output is
    set to whatever the Griddy's current master pattern is when it changes.
  • Step Trigger - Tells the Griddy to pick the next step in the pattern sequence.
  • Step Gate - Can be used by other devices to detect when the Griddy has changed to a different step. This is most useful when Griddy is used in Live mode to detect when the user has told the Griddy to step; otherwise, this will normally just match the signal passed to the Step Trigger input.
  • Pattern Output - This is the pattern value that the current step has assigned to it as described above.
  • The individual step gates are output ports that are activated whenever the Griddy switches to the corresponding step but not during repeats of the step. This can be used to trigger events that occur when a certain part of the sequence is reached. For instance, it might be used to reset an LFO's timing by connecting it to the LFO Trigger In port. The LFO's CV Out could then be connected to a Drumboto's Pitch Input to cause a sample to do funky things the first time a Griddy step is reached.
The most advanced use of the Griddy is to have one Griddy controlling another Griddy. The Master Griddy could be thought of as a song "section" sequencer, and the controlled Griddy could be the individual section "block" sequencer which in turn controls a Drumboto's individual sample sequencer. The master would control transtion from the various parts of the song - start, middle, bridges, etc - and the controlled Griddy could control the playback of samples within each section.
That pretty much sums up what the Griddy can do. Please contact us if you have any questions on how to use this device. The Griddy is the most complicated feature of Atomic Sound and if there is anything we can do to make it's usage more clear please let us know.