via Lushprojects.com where you'll find some audio demos.
"The LushOne Echo module provides highly flexible delay and echo effects. All key parameters can be set manually or manipulated using a control voltage. With the LushOne echo you can simulate room echoes or create space-age effects. The LushOne Echo also contains an envelope generator which produces a control voltage based on the amplitude of the input signal.
The LushOne Echo kit continues the design principles of the LushOne base. A single board design is used to keep costs low. The LushOne echo uses the popular PT2399 digital delay chip with supporting analogue circuits. The PT2399 is a really fun chip. At long delays it gets noisy and creates a lo-fi roughness to the sound. At medium and short delays it has a nice, natural quality. The ability to vary the delay on-the-fly and with a control voltage allows it to create space-age swoops and zaps as well as more normal static delay effects.
The LushOne Echo can be added to any level of the LushOne system. It can be used with just the LushOne Base or integrated in to a bigger system. The audio sample below shows how even with just the LushOne Base and LushOne Echo you can create some amazing sounds.
The LushOne Echo provides:
Echo effect
Add echo effects to any input signal
Adjustable input sensitivity level
Adjustable level of original input in the output
Adjustable level of echo in the output with voltage control
Adjustable level of feedback in the echo circuit with voltage control
Adjustable delay with voltage control
Exponential response on delay control for ease of use
Internal or external feedback switch which allows extra processing functions to be inserted in the feedback loop using the Send/Return connections
Power-on protection circuit so that the PT2399 chip can be run at its shortest possible delay without damage
Envelope generator
Create control voltage based on amplitude of input signal
Allows effects to respond to volume level of a sound
Single board design including all controls and connectors (except power-in) providing straightforward construction and neat presentation. A laser cut case is available that contains the LushOne base and the Inca or it can easily be housed in a project box.
Open-source access to schematics
The LushOne Echo is straightforward to build but it does have quite a high component count. It is recommended that you have some experience in building electronics before starting on this kit."
