Packages

object BufRd extends Serializable

A UGen which reads the content of a buffer, using an index pointer.

Warning: if the supplied bufID refers to a buffer whose number of channels differs from numChannels , the UGen will fail silently.

An alternative to BufRd is PlayBuf . While PlayBuf plays through the buffer by itself, BufRd only moves its read point by the index input and therefore has no pitch input. PlayBuf uses cubic interpolation, while BufRd has variable interpolation. PlayBuf can determine the end of the buffer and issue a done-action.

Examples
// Write and read
val b = Buffer.alloc(s, numFrames = 32768, numChannels = 1)

// write into the buffer with a BufWr
val y = play {
  val in = SinOsc.ar(LFNoise1.kr(2).madd(300, 400)) * 0.1
  val rate = "rate" kr 1
  BufWr.ar(in, b.id, Phasor.ar(0, BufRateScale.kr(b.id) * rate, 0, BufFrames.kr(b.id)))
  0.0 // quiet
}

// read it with a BufRd
val x = play {
  val rate = "rate" kr 1
  BufRd.ar(1, b.id, Phasor.ar(0, BufRateScale.kr(b.id) * rate, 0, BufFrames.kr(b.id)))
}

y.set("rate" -> 0.5) // notice the clicks when the play head overtakes the write head!
x.set("rate" -> 0.5)
y.set("rate" -> 1.0)
See also

BufRateScale

BufFrames

Phasor

BufWr

PlayBuf

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  4. def ar(numChannels: Int, buf: GE, index: GE = 0.0f, loop: GE = 1, interp: GE = 2): BufRd

    numChannels

    number of channels that the buffer will be. Since this is an integer constant, a change in the number of channels must be reflected by creating different SynthDefs.

    buf

    the identifier of the buffer to use

    index

    audio rate frame-index into the buffer. Can be fractional.

    loop

    1 to enable looping, 0 to disable looping. this can be modulated.

    interp

    1 for no interpolation, 2 for linear, and 4 for cubic interpolation. (init-time only)

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  12. def ir(numChannels: Int, buf: GE, index: GE = 0.0f, loop: GE = 1, interp: GE = 2): BufRd

    numChannels

    number of channels that the buffer will be. Since this is an integer constant, a change in the number of channels must be reflected by creating different SynthDefs.

    buf

    the identifier of the buffer to use

    index

    audio rate frame-index into the buffer. Can be fractional.

    loop

    1 to enable looping, 0 to disable looping. this can be modulated.

    interp

    1 for no interpolation, 2 for linear, and 4 for cubic interpolation. (init-time only)

  13. final def isInstanceOf[T0]: Boolean
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  14. def kr(numChannels: Int, buf: GE, index: GE = 0.0f, loop: GE = 1, interp: GE = 2): BufRd

    numChannels

    number of channels that the buffer will be. Since this is an integer constant, a change in the number of channels must be reflected by creating different SynthDefs.

    buf

    the identifier of the buffer to use

    index

    audio rate frame-index into the buffer. Can be fractional.

    loop

    1 to enable looping, 0 to disable looping. this can be modulated.

    interp

    1 for no interpolation, 2 for linear, and 4 for cubic interpolation. (init-time only)

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