Generating negative harmonics
in [DSP]
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From: jacko on 17 Mar 2010 11:57 Hi Sub harmonics? umm. integrate your signal, comparator slice it with the LPF DCish of your signal, feed back some of this square wave after dividing by two via a schmitt trigger FF into your signal. Low pass filter this and add some to your original signal to make the sub harmonic enhanced version. Cheers Jacko p.s. don't forget the sub base W bins. ;-)
From: jacko on 17 Mar 2010 12:05 On 17 Mar, 15:57, jacko <jackokr...(a)gmail.com> wrote: > Hi > > Sub harmonics? umm. integrate your signal, comparator slice it with > the LPF DCish of your signal, feed back some of this square wave after > dividing by two via a schmitt trigger FF into your signal. Low pass > filter this and add some to your original signal to make the sub > harmonic enhanced version. > > Cheers Jacko > > p.s. don't forget the sub base W bins. ;-) don't forget a delay line feedback for that ooooooooooooooh.
From: Tim Wescott on 17 Mar 2010 12:08 jacko wrote: > Hi > > Sub harmonics? umm. integrate your signal, comparator slice it with > the LPF DCish of your signal, feed back some of this square wave after > dividing by two via a schmitt trigger FF into your signal. Low pass > filter this and add some to your original signal to make the sub > harmonic enhanced version. > > Cheers Jacko > > p.s. don't forget the sub base W bins. ;-) This works well with signals that have a strong fundamental, like guitar. In fact, there's a guitar effect that does just this. For signals that lack the fundamental (bells), or where the fundamental is of lower strength than the harmonics (can't think off the top of my head -- don't brass instruments do this?) it won't work. -- Tim Wescott Control system and signal processing consulting www.wescottdesign.com
From: jungledmnc on 17 Mar 2010 13:33 >Hi > >Sub harmonics? umm. integrate your signal, comparator slice it with >the LPF DCish of your signal, feed back some of this square wave after >dividing by two via a schmitt trigger FF into your signal. Low pass >filter this and add some to your original signal to make the sub >harmonic enhanced version. > >Cheers Jacko > >p.s. don't forget the sub base W bins. ;-) > Uuuuuu :)) what? :)) Could you write it in twice as number of words? I'm trying to decode it, but I'm kinda stuck :)).
From: Jerry Avins on 17 Mar 2010 14:54
jungledmnc wrote: > Thank you all people! And Nils actually that's what I'm talking about - > audio stuff, so thanks a lot for valuable info! > > Anyway folks can you point me out to some zero-latency method? I mean there > was a Hilbert transformer idea, I never did it, but assume it is > similar/generalized fourier transform, so it would be processed block by > block, therefore induce latency. Similar with pitch-shifting, I guess it > could be done using granular-pitch shifting, but the results are usually > quite ugly. Every process introduces latency od some amount. If you can cite one that seems to you to have none, you will have described a tolerable amount. Jerry -- Discovery consists of seeing what everybody has seen, and thinking what nobody has thought. .. Albert Szent-Gyorgi ����������������������������������������������������������������������� |