Mod­u­lar Monthly

AJH Synth Ring SM

Future Music - - CONTENTS -

Like ev­ery­thing we’ve tried from AJH Synth, the Ring SM (ring mo­du­la­tor, sub gen­er­a­tor and mixer) is some­thing spe­cial for those into ring mod­u­la­tors – and even for those who aren’t. A unique de­sign us­ing a warm vin­tage dis­crete cir­cuit from the ’60s, there’s no off-the-shelf ba­sic ring mod­u­la­tion here. The Z in­put, ac­tu­ally a sec­ond Y in­put, lets you mix ad­di­tional sig­nals and also has a dif­fer­ent phase re­la­tion­ship in the cir­cuit, giv­ing a more res­o­nant char­ac­ter against the Y in­put.

We also have a ‘dou­ble’ switch which lets you take a sin­gle X in­put and ig­nore the Y func­tion and mod­u­late the X in­put against it­self to cre­ate a fre­quency dou­bling ef­fect. The two sub gen­er­a­tors cre­ate -1 and 2 sub waves based on the X in­put, so you can add weight in the lower oc­taves (some­times lost from more ex­treme ring mod­u­la­tion). Like the ring mo­du­la­tor, th­ese sub gen­er­a­tors are also more unique than you may ex­pect as they’re shaped sine waves and not just ba­sic square wave subs. The waves shape from skewed to clipped giv­ing a rich, warm bass tone that doesn’t eat up space in the mix or sound flabby as low pitched square waves can.

Fi­nally the mixer sec­tion is based on a ’70s Moog CP3 cir­cuit which of­fers fan­tas­tic sound­ing clip­ping if you want it. Nor­mal­i­sa­tion gives you the Ring Mod­u­la­tors out­puts and sub as part of the mixer or you can use it as a straight five-in­put mixer. The out­put level is also a nice touch for chang­ing the re­sponse of level-de­pen­dent mod­ules fur­ther down the patch.

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