The Echo tool is a realtime utility. When you turn it On (the On button is a toggle switch), all MIDI input will be echoed to MIDI output. The default settings will echo each MIDI input note with a delay time of one beat, but you can control the delay and other factors by moving the sliders. The time slider controls the delay time between echos. The trans slider controls the pitch transposition of each echo. For example, if the trans slider is set to 7, then the echoed notes will be transposed 7 steps up (i.e. a fifth). Likewise, a value of -7 will transpose a fifth down.

The vol slider controls the volume decay. For example, if it is set to 50%, then the volume of each echoed note will be decreased by 50 percent.

The ntimes slider controls how many echoes are generated. For example, if it is set to 4, then each input MIDI note will be echoed 4 times. If the vol slider was set to 50%, the volume of the 4th echo would be 1/16 the volume of the initial note. Also, if the trans slider was set to 2, then the pitch of the 4th echo would be 8 steps above the original note.

Since KeyKit is multi-tasking, it is possible (and great fun) to create multiple Echo tools and have them operating simultaneously, with different settings in each.

There is also an EchoInfinite tool that works just like the Echo tool, but which echoes forever (or until each note's volume reaches 0).