AmpComp

A UGen that produces a psychoacoustic amplitude compensation factor for a given frequency.

Implements the formula: (root / freq).pow(exp)

Higher frequencies are normally perceived as louder, therefore AmpComp outputs lower values for them. For example, with default parameters, the pitch C4 (frequency 262 Hz) produces the base factor of 1.0, whereas a pitch one octave up, C5 (or 523 Hz) produces a factor of 0.793719 (an attenuation of -2 dB).

An alternative is AmpCompA that better models the bell-shaped equal loudness contours of the hearing system. Especially note that the output of this UGen can become very high for frequencies much lower than the root parameter.

Examples

// activate with mouse button
play {
  val freq = MouseX.kr(300, 15000, 1)
  val mod  = freq * SinOsc.ar(MouseY.kr(3, 200, 1)).madd(0.5, 1)
  val corr = AmpComp.ar(mod, 300) * 2
  val amp  = Select.ar(MouseButton.kr(lag = 0), Seq(DC.ar(1), corr))
  SinOsc.ar(mod) * 0.1 * amp
}

See also: AmpCompA

Linear Supertypes

Serializable, Serializable, AnyRef, Any

Value Members

final def !=(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def ##(): Int

Definition Classes
AnyRef → Any
final def ==(arg0: Any): Boolean

Definition Classes
AnyRef → Any
def ar(freq: GE = 261.626f, root: GE = 261.626f, expon: GE = 0.3333f): AmpComp

freq
the frequency in Hertz for which to determine the compensation factor
root
the base frequency corresponding to a compensation factor of 1.0
expon
the exponent determines how steep the compensation curve decreases for increasing frequencies. In general, the louder a signal is played, the shallower the equal loudness contours become.
def ar: AmpComp
final def asInstanceOf[T0]: T0

Definition Classes
Any
def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( ... )
final def eq(arg0: AnyRef): Boolean

Definition Classes
AnyRef
def equals(arg0: Any): Boolean

Definition Classes
AnyRef → Any
def finalize(): Unit

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( classOf[java.lang.Throwable] )
final def getClass(): Class[_]

Definition Classes
AnyRef → Any
def hashCode(): Int

Definition Classes
AnyRef → Any
def ir(freq: GE = 261.626f, root: GE = 261.626f, expon: GE = 0.3333f): AmpComp

freq
the frequency in Hertz for which to determine the compensation factor
root
the base frequency corresponding to a compensation factor of 1.0
expon
the exponent determines how steep the compensation curve decreases for increasing frequencies. In general, the louder a signal is played, the shallower the equal loudness contours become.
def ir: AmpComp
final def isInstanceOf[T0]: Boolean

Definition Classes
Any
def kr(freq: GE = 261.626f, root: GE = 261.626f, expon: GE = 0.3333f): AmpComp

freq
the frequency in Hertz for which to determine the compensation factor
root
the base frequency corresponding to a compensation factor of 1.0
expon
the exponent determines how steep the compensation curve decreases for increasing frequencies. In general, the louder a signal is played, the shallower the equal loudness contours become.
def kr: AmpComp
final def ne(arg0: AnyRef): Boolean

Definition Classes
AnyRef
final def notify(): Unit

Definition Classes
AnyRef
final def notifyAll(): Unit

Definition Classes
AnyRef
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
def toString(): String

Definition Classes
AnyRef → Any
final def wait(): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long, arg1: Int): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )

Related Docs: class AmpComp | package ugen

object AmpComp extends Serializable

Examples

Value Members

final def !=(arg0: Any): Boolean

final def ##(): Int

final def ==(arg0: Any): Boolean

def ar(freq: GE = 261.626f, root: GE = 261.626f, expon: GE = 0.3333f): AmpComp

def ar: AmpComp

final def asInstanceOf[T0]: T0

def clone(): AnyRef

final def eq(arg0: AnyRef): Boolean

def equals(arg0: Any): Boolean

def finalize(): Unit

final def getClass(): Class[_]

def hashCode(): Int

def ir(freq: GE = 261.626f, root: GE = 261.626f, expon: GE = 0.3333f): AmpComp

def ir: AmpComp

final def isInstanceOf[T0]: Boolean

def kr(freq: GE = 261.626f, root: GE = 261.626f, expon: GE = 0.3333f): AmpComp

def kr: AmpComp

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

final def synchronized[T0](arg0: ⇒ T0): T0

def toString(): String

final def wait(): Unit

final def wait(arg0: Long, arg1: Int): Unit

final def wait(arg0: Long): Unit

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

Ungrouped