Rapture oscillators

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RogerH
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2015/05/09 04:24:20 (permalink)

Rapture oscillators

Is the oscillator in Rapture (and Rapture Pro) DSP or sample based?
I know that you can load samples, but I'm thinking about Sine, square and saw wawes

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    Dan_E10
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    Re: Rapture oscillators 2015/05/11 10:27:03 (permalink)
    I'm not sure exactly what you mean by dsp based.  It can load both samples and single cycle wavetables.  Due to the wave Rapture Pro's engine handles the wavetables, they can be transposed across the entire keyboard without aliasing.  There are a bunch of basic single cycle waveforms included such as multiple sawtooths, square waves, sines, etc.  There's also the waveguide oscillator mode.  Here you load an impulse and it is processed through a waveguide.  This originated in Dimension Pro, but the waveguide parameters weren't changeable.  I don't think you can play with the waveguide parameters in Rapture Pro either, but I'm not sure about that.
    Dan
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    RogerH
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    Re: Rapture oscillators 2015/05/11 17:33:06 (permalink)
    Thanks for the reply.
    When I said DSP based, I was thinking about oscillators in synths like u-he diva.
    But it seems like I need to learn more about sampels vs wawetable

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    AT
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    Re: Rapture oscillators 2015/05/12 01:06:54 (permalink)
    There are two kinds of wavetables - the kind in Rapture and those that waldorf and Ensoniq used to make.  They are tables of wave shapes, basically different samples that are stapled together to form one long wave -  64 waves is common.  You can use an envelope or lfo etc. to cycle through the "wave," producing rhythmic and radically changing oscillators shapes. 

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    lfm
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    Re: Rapture oscillators 2015/05/12 01:57:29 (permalink)
    RogerH
    But it seems like I need to learn more about sampels vs wawetable

    I only have DP, but there are waveforms for sine and saw, if you want to build classic synth sounds.
    Saw I found among Elements and Production3 or something.
    Then among bass synths RGC Unlimited Sine.
    Don't remember for Square though, but probably there.
     
    What you might miss from standard synths is PulseWidthModulated square.
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    Dan_E10
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    Re: Rapture oscillators 2015/05/12 12:51:16 (permalink)
    lfm
    What you might miss from standard synths is PulseWidthModulated square.


    There's a workaround to get a PWM pulse wave in Rapture.  You need to use a sawtooth wave and a ramp (inverted saw) with a phase offset.  The two waves add together to give you a pulse.  The phase offset determines the width.  Rene, Rapture and Dimension Pro's original designer, posted a tutorial on this forum back when Rapture first came out.  
    http://forum.cakewalk.com/Secrets-of-Rapture-PWM-m788580.aspx
     
    Unfortunately the links to the .wav files you need are broken so you would have to create them yourself.
    Dan
    #6
    chad
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    Re: Rapture oscillators 2015/05/12 14:51:28 (permalink)
    Dan_E10
    lfm
    What you might miss from standard synths is PulseWidthModulated square.


    There's a workaround to get a PWM pulse wave in Rapture.  You need to use a sawtooth wave and a ramp (inverted saw) with a phase offset.  The two waves add together to give you a pulse.  The phase offset determines the width.  Rene, Rapture and Dimension Pro's original designer, posted a tutorial on this forum back when Rapture first came out.  
    http://forum.cakewalk.com/Secrets-of-Rapture-PWM-m788580.aspx
     
    Unfortunately the links to the .wav files you need are broken so you would have to create them yourself.
    Dan




    I've still got the perfect wavetables from that forum post right here:
     
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