The Alesis XT Digital Reverb can be used in conjunction with a mixing console providing stereo reverb returns, or stand-alone with electric instruments and amplifiers. The Alesis XT contains a large memory array and a high-speed arithmetic processing circuit that executes special Alesis-developed algorithms.
The result is reverberation typical of units costing ten times as much. Extra memory and high-speed electronics give the Alesis XT a generous frequency response of 14KHZ, formerly found only in very expensive units. Excellent treble response preserves the delicate sibilance of vocals and the brilliance of certain percussion instruments. Large memory capacity gives the XT a remarkably flat and uniform frequency response rarely found in even the best acoustic chambers.
The arithmetic processor in the Alesis XT has special overflow handling circuitry that avoids the abrupt output transients caused by clipping in many digital audio processing products. Overdriving the XT is not recommended, but due to its soft clipping characteristic, output saturation often goes unnoticed with no adverse effect.
The XT has the ability to generate extremely high echo density. Controlled from the front panel, a single impulse can be turned into hundreds or many thousands of discreet output pulses, all distributed in full stereo. High echo density gives the Alesis XT particularly smooth decay, even with the most difficult percussive material.
Front panel controls allow variation of delays, frequency response, echo density and decay times. The controls are organised in a logical, easily understood way to allow for quick setup and change. For those not familiar with digital reverberation, the top of the unit is screened with flowcharts and descriptive control information.
Rear panel connections interface easily to other equipment. A loop in the reverberator input circuit is provided for additional equipment such as equalisers and digital delays. The delay and frequency response options available at the front panel make the loop necessary only in special effect situations.
