More info... https://RucciElectronics.com/4STEP
http://www.etsy.com/shop/MichaelRucci
This contains four square-wave oscillators that are triggered in a four step sequence.
You have control over the speed of the sequencer as well as the pitch of each step. There is also a built in low-pass filter and volume control. With the LPF rolled down you can raise the pitch of an individual step out of range, essentially turning off that step.
This syncs up with other devices that make use of 5volt clock. Over 1/8" (3.5mm) jacks it has a sync input and two sync outputs, one that outputs clock for each step and one that outputs clock per full sequence. This allows multiple units to sync up either step for step or over lapping. An example of syncing is at 1:52.
It is housed in an extremely tough, raw aluminum case. It is powered by an 9volt battery or 9volt center-negative DC adapter. It has a standard 1/4" jack.
