Nsound::FluteSlide Class Reference

Class Drum. More...

#include <Nsound/FluteSlide.h>

Inheritance diagram for Nsound::FluteSlide:

Public Member Functions
	FluteSlide (const float64 &sample_rate)
	Creates a Bass Kick Drum. More...
	~FluteSlide ()
	Destructor. More...
AudioStream	play ()
	Plays a demo for this instrument. More...
AudioStream	play (const float64 &duration, const float64 &frequency)
	Plays a static note for this instrument. More...
AudioStream	play (const float64 &duration, const float64 &frequency, const float64 &presure, const float64 &breath)
	Plays a static note for this instrument. More...
std::string	getInfo ()
	Nsound::FluteSlide information. More...

Protected Attributes
float64	sample_rate_

Detailed Description

Class Drum.

Definition at line 50 of file FluteSlide.h.

Constructor & Destructor Documentation

FluteSlide::FluteSlide

(

const float64 &

sample_rate

)

Creates a Bass Kick Drum.

Definition at line 40 of file FluteSlide.cc.

    :
    Instrument(sample_rate)
{
}

FluteSlide::~FluteSlide

(

)

Destructor.

Definition at line 48 of file FluteSlide.cc.

{
}

Member Function Documentation

AudioStream FluteSlide::play ( )

virtual

Plays a demo for this instrument.

Implements Nsound::Instrument.

Definition at line 54 of file FluteSlide.cc.

References play(), and Nsound::Instrument::sample_rate_.

Referenced by main(), and play().

{
    AudioStream y(sample_rate_, 1);

    //     duration,    freq
    y << play(0.600, 261.616)
      << play(0.600, 293.656)
      << play(0.600, 329.609)
      << play(0.600, 349.218)
      << play(0.600, 391.973)
      << play(0.600, 445.000);

    return y;
}

AudioStream FluteSlide::play ( const float64 &  duration, const float64 &  frequency  )

virtual

Plays a static note for this instrument.

Implements Nsound::Instrument.

Definition at line 71 of file FluteSlide.cc.

References play().

{
    return play(duration, frequency, 1.0, 0.05);
}

AudioStream FluteSlide::play	(	const float64 &	duration,
		const float64 &	frequency,
		const float64 &	presure,
		const float64 &	breath
	)

Plays a static note for this instrument.

Definition at line 78 of file FluteSlide.cc.

References Nsound::Generator::drawLine(), Nsound::FilterTone::filter(), Nsound::Buffer::getLength(), Nsound::AudioStream::normalize(), Nsound::DelayLine::read(), Nsound::Instrument::sample_rate_, Nsound::Generator::whiteNoise(), and Nsound::DelayLine::write().

{
    Sine sine(sample_rate_);

    float64 n_delay_seconds = 1.0 / frequency;

    DelayLine delay1(sample_rate_, n_delay_seconds / 2.0);
    DelayLine delay2(sample_rate_, n_delay_seconds);

    FilterTone tone(sample_rate_, 2000.0);


    Buffer env1 =  sine.drawLine(0.1, 0.0, pressure)
                << sine.drawLine(duration - 0.2, pressure, pressure)
                << sine.drawLine(0.1, pressure, 0.0);

    Buffer env2 =  sine.drawLine(0.01, 0.0, 1.0)
                << sine.drawLine(duration - 0.02, 1.0, 1.0)
                << sine.drawLine(0.01, 1.0, 0.0) << 0.0;

    Buffer flow = env1 * sine.whiteNoise(duration);

    Buffer input = breath * flow + env1;

    float64 flute = 0.0;

    uint32 n_samples = input.getLength();

    AudioStream y(sample_rate_, 1);

    for(uint32 n = 0; n < n_samples; ++n)
    {
        float64 x = input[n] + flute * 0.35;

        delay1.write(x);

        x = delay1.read();

        x -= x * x * x;

        x += flute * 0.4;

        x = tone.filter(x);

        y << x;

        delay2.write(x);

        flute = delay2.read();
    }

    y *= env2 * duration;

    y.normalize();

    return y;
}

std::string Nsound::FluteSlide::getInfo ( )

inlinevirtual

Nsound::FluteSlide information.

Implements Nsound::Instrument.

Definition at line 74 of file FluteSlide.h.

    {
        return
            "Nsound::FluteSlide by Nick Hilton\n\n"

            "Based on physical models written in Csound by Hans Mikelson.\n"
            "Originally based on Perry Cook's physical model.\n\n"

            ";PERRY COOK'S SLIDE FLUTE\n"
            "\n"
            "          instr     3\n"
            "\n"
            "aflute1 init   0\n"
            "ifqc    =           cpspch(p5)\n"
            "ipress  =           p6\n"
            "ibreath =           p7\n"
            "\n"
            "; FLOW SETUP\n"
            "kenv1   linseg      0, .1, ipress, p3-.2, ipress, .1, 0\n"
            "kenv2   linseg      0, .01, 1, p3-.02, 1, .01, 0\n"
            "\n"
            "; THE VALUES MUST BE AROUND -1 AND 1 OR THE CUBIC WILL BLOW UP.\n"
            "aflow1    rand      1\n"
            "aflow1    =         aflow1 * kenv1\n"
            "\n"
            "; .0356 CAN BE USED TO ADJUST THE BREATH LEVEL.\n"
            "asum1     =         ibreath*aflow1 + kenv1\n"
            "asum2     =         asum1 + aflute1*.4\n"
            "\n"
            "; EMBOUCHURE DELAY SHOULD BE 1/2 THE BORE DELAY\n"
            "\n"
            "ax        delay     asum2, 1/ifqc/2 - 15/sr\n"
            "\n"
            "apoly     =         ax - ax*ax*ax\n"
            "asum3     =         apoly + aflute1*.4\n"
            "\n"
            "avalue    tone      asum3, 2000\n"
            "\n"
            "; BORE THE BORE LENGTH DETERMINES PITCH.  SHORTER IS HIGHER.\n"
            "aflute1 delay  avalue, 1/ifqc - 15/sr\n"
            "\n"
            "          out  avalue*p4*kenv2\n"
            "\n"
            "          endin;\n";
    };

Member Data Documentation

float64 Nsound::Instrument::sample_rate_

protectedinherited

Definition at line 76 of file Instrument.h.

Referenced by Nsound::Hat::Hat(), Nsound::Hat::operator=(), Nsound::Clarinet::play(), Nsound::DrumBD01::play(), play(), Nsound::GuitarBass::play(), Nsound::DrumKickBass::play(), Nsound::OrganPipe::play(), and Nsound::Hat::play().

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The documentation for this class was generated from the following files:

• Nsound/FluteSlide.h
• Nsound/FluteSlide.cc