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<blockquote data-quote="thch" data-source="post: 1844392" data-attributes="member: 562032">the epicenter is based upon a digital signal processing patent from the 80s.&nbsp; the patent is up IIRC, so there may be more interest in commercial subharmonic synthesizers again.the epicenter is best described as an adaptive subharmonic synthesizer.&nbsp; long words, but accurate.what it does is look for, say a 200hz and 300hz and 400hz tone.&nbsp; if it finds these tones, but cannot find a 100hz tone, it will add a 100hz tone into the mix -- this tone is a factor of 200, 300, ect... but is lower.&nbsp; thus is is a sub (lower) harmonic (integer multiple) which has been created (synthesized) and added to the music.textbook subharmonic synthesisers do a poor job with vocals though.&nbsp; and can often lead to booming bass that follows no rythm and sounds out of place.&nbsp; the epicenter&#039;s patent details how this issue is resolved.&nbsp; that is where the &quot;adaption&quot; comes in -- the effect adapts its parameters to the music.now from a technical standpoint, this process shouldn&#039;t be required.&nbsp; bass shouldn&#039;t be lost, and if it is lost, it should follow a linear model in which case an EQ could fix things.&nbsp; this probably wasn&#039;t as true back when the patents were filed in the 80s though.&nbsp; and i guess some creative signal processing might affect things for the worst.</blockquote>

[QUOTE="thch, post: 1844392, member: 562032"] the epicenter is based upon a digital signal processing patent from the 80s. the patent is up IIRC, so there may be more interest in commercial subharmonic synthesizers again. the epicenter is best described as an adaptive subharmonic synthesizer. long words, but accurate. what it does is look for, say a 200hz and 300hz and 400hz tone. if it finds these tones, but cannot find a 100hz tone, it will add a 100hz tone into the mix -- this tone is a factor of 200, 300, ect... but is lower. thus is is a sub (lower) harmonic (integer multiple) which has been created (synthesized) and added to the music. textbook subharmonic synthesisers do a poor job with vocals though. and can often lead to booming bass that follows no rythm and sounds out of place. the epicenter's patent details how this issue is resolved. that is where the "adaption" comes in -- the effect adapts its parameters to the music. now from a technical standpoint, this process shouldn't be required. bass shouldn't be lost, and if it is lost, it should follow a linear model in which case an EQ could fix things. this probably wasn't as true back when the patents were filed in the 80s though. and i guess some creative signal processing might affect things for the worst. [/QUOTE]

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