New Oakley ADR30 DIY Analogue Delay Line and Chorus Module

via Oakley Sound, where you'll find full details and build instructions. A snip for the archives:

"The Oakley Sound Systems ADR30 is an analogue delay module that processes audio signals to create echo and chorus effects. It uses two Xvive MN3005 bucket brigade delay (BBD) integrated circuits to produce a very distinct 'vintage' sound. Classic companding noise reduction circuitry further adds to the sonic characteristics.

Delay time is controlled by a single control on the front panel as well as a built in low frequency modulation oscillator and/or an external control voltage. With short delay times using the modulation oscillator can create both subtle and deep chorus effects. A front panel switch controls whether the signal runs through one or both MN3005 devices. Anti-aliasing filtering is achieved by two 6-pole discrete switched capacitor low pass filters that track the delay time, giving the maximum audio bandwidth for the specific delay time. Thus short delays remain reasonably bright sounding while longer delays become increasingly dark. Delay time can be varied continuously from 15ms to 300ms in short mode, and 30ms to 600ms in long mode.

The unit is mono but features separate outputs for the wet/dry signal and the delayed signal. The audio input and outputs are balanced but are compatible with non balanced connections. A two LED level meter helps you keep signal levels at optimum ensuring a respectable signal to noise ratio without clipping. The unit will not be damaged by driving the unit into overdrive and interesting sounds can be obtained by deliberately doing so, either by turning up the input level or by allowing the feedback to build up to self oscillation. Although the unit does feature noise reduction circuitry the delay line devices are inherently noisy and have a very restricted bandwidth. The signal will deteriorate in an interesting manner as the delay time is increased and/or feedback is heavily applied."