olabuffer
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## olabuffer

olabuffer — Sum overlapping frames of audio as k-rate arrays and read as an audio signal

## Description

olabuffer This opcode takes 1 dimensional k-rate arrays that contain sequential frames of audio and sums them based on an overlap factor resulting in an audio signal output. This is useful for frame based audio processing such as spectral analysis/synthesis.

## Syntax

    aout olabuffer kin, ioverlap

## Initialization

ioverlap -- The amount of overlaps per k-array input frame sample size. For example for an input window size of 1024, and a hop size of 256 the overlap factor would be 4. The overlap factor must be larger than or equal to ksmps and must also be an integer multiple of the input k-rate array sample count.

## Performance

aout -- The resulting audio signal from the added input frames. kin -- A k-rate array containing sequential frames of audio.

## Examples

Here is a simple example of the olabuffer opcode. It uses the file framebuffer.csd.

Example 582. Example of the olabuffer opcode.

See the sections Real-time Audio and Command Line Flags for more information on using command line flags.

    <CsoundSynthesizer>
    <CsOptions>
    -odac
    </CsOptions>
    <CsInstruments>
    nchnls = 2
    0dbfs = 1
    ksmps = 128
    sr = 44100

    instr 1
        isize init 1024
        ioverlaps init 4

        asig diskin2 "fox.wav", 1, 0, 1
        kframe[] framebuffer asig, isize
        kwindowedFrame[] window kframe, isize

        aout olabuffer kwindowedFrame, ioverlaps
        aout = aout / 2

        outs aout, aout
    endin

    </CsInstruments>
    <CsScore>
    i 1 0 400
    </CsScore>
    </CsoundSynthesizer>

## See Also

olabuffer shiftin shiftout

## Credits

Author: Edward Costello;
NUIM, 2015

New in version 6.06

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