$10,000 US), to inexpensive Casio WK series home keyboards that have a digitally-recreated "tonewheel organ" function (which are available for less than $400 US). In between are numerous keyboard-based models from Hammond, Korg, Roland, Clavia (Nord Series), rack-mounted modules, and software-based "virtual synths" (such as the B4 by Native Instruments) which provide simulations of the B-3 sound. There is even a model by the Pari.E company which uses a modern version of the classic Hammond tonewheels, not a digital simulation. The use of Hammond clones and the merits of using clones versus the vintage electromechanical Hammond is the subject of lively debate amongst musicians. The argument that digital simulations cannot recreate the complex interplay of variables that create the "Hammond sound" (tonewheel leakage, Leslie speaker rotation, etc.) is supported by a review of clones in Keyboard Magazine. The article, entitled "Clonewheel Heaven", reviewed electronic simulations of the traditional Hammond sound, and claimed that some aspects of the vintage electromechanical Hammonds' sound are not accurately reproduced by clones and emulation devices. Nevertheless, the increasing use of clonewheel organs on recordings by jazz and blues organ solo players is testimony to their sound and tone quality; it is also worth noting the wide variety of tonal variations that exist even among genuine vintage tonewheel Hammond organs. Owing to any number of causes — not least of which are the age of its components and the amount of use a tonewheel organ has had — variations in volume levels between tonewheels, varying levels of key click, and other tonal differences are more common than not. Despite the widespread availability of relatively lower-cost, reliable digital "clones" and emulation devices, and the near-universal use of "clones" for band tours and club gigs, many jazz, blues and gospel keyboardists still have a strong interest in using vintage Hammond organs for studio recordings. Even if a clone is able to accurately reproduce the vintage electromechanical Hammond sound — several companies such as Clavia and Hammond Suzuki are making this claim — performers still have an affection for the look, feel, characteristics and heritage embodied in the much heavier, old wooden vintage instruments. Format Clonewheel organs are available in several formats. The first is an integrated keyboard, in which the keyboard and the circuitry that provides the tonewheel emulation is in the same chassis. A second approach is a sound module, a tabletop device which only provides the