Frequencies please

phlee Mar 31, 2004

  1. phlee

    phlee Reformed Addict

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    I'm designing a pair of sound reactive glowsticks which change colour according to the amount of high, mid and low frequencies in the sound they hear through the in-built microphone :Smile3: Since I'll probably be using them at psy nights predominantly, I wondered if there is a characteristic frequency range in which reside the highs (say, the melodies), mids (assorted drums and squelchy sounds) and lows (bass lines and kick) of psy so that I can design the filter response curves accordingly. Any help much appreciated :Grin:
     
  2. jsainsbury

    jsainsbury Forum Addict

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    pretty hard to say in such a sweeping way but:

    bass in particualry subbassy, mainly 80-200 hz for the omph then anywhere up to 1khz for the drive

    a lot of very high frequency content going on in them there hats 10-13khz and up to the top

    mucho mucho misd rande whizzing that could be anywhere betweenm the bass and highs

    youd be better of just using arbitary estimates and sdeing how it goes
     
  3. Plank!

    Plank! Guest

    I'd probably try setting the crossover points at 125Hz and 3-5KHz. Play around with the Mid-Hi settings as that’s were things are less segregated.
    Also try using asymmetrical crossover points, e.g., you could cut the mid's off at 3KHz and bring the HF in at 5KHz. That would make more of a distinction between bands.

    Things are a little fuzzy with Psy-Trance, the "lead" lines cover a very wide frequency range. Also the characteristics of the sounds make them very broadband - FM synthesis, "Bit-Crusher", Doppler shifts etc.
    I've seen a recent trend towards full spectrum sounds, some of EVP's recent stuff, had my spectrum analyser, moving like a ruler straight line from 20Hz to 20KHz. Its not just EVP others are doing this, makes it hard to define what's supposed to go where.


    Regards
    Steve
     
  4. phlee

    phlee Reformed Addict

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    Cheers guys :punk: yeah, i was worried it might not be as simple as bass-mid-high :wacko: The asymmetrical crossovers is something that crossed my mind, so the suggestion confirms I should give it a try. I think whatever I do they're going to need tweaking. Active filters are such a bitch to tune on the fly, though :hehe:
     
  5. Speakafreaka

    Speakafreaka Champagne Rouletter

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    i would reccomend getting hold of wavelab, and making use of the frequency analysis tool in there.

    this is a very useful graphical representation of what is going on in a track at any particular given moment.

    Analysing your record collection, and taking the mean average of freuencies should give you a rough idea.

    Also - have you considered that bass is normally much louder (literally) than treble? I don't know if this has any impact on your plans, but i would find out if i were you. the difference is marked, and microphones don't hear thigns in the same way as ears!

    as always

    good luck would love to see the results of this endeavour!
     
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