GEN53
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## GEN53

GEN53 — Creates a linear-phase or minimum-phase impulse response table from a source table containing a frequency response or an impulse response.

## Description

GEN53 creates an impulse response function table with either a linear-phase or a minimum-phase characteristic. The source for this can either be a frequency response or an impulse response, stored in an existing table. Optionally, another function table can be used to window the input and/or the output of the process.

## Syntax

    f # time size 53 fsrc
        [mode fwin]

fsrc - source function table. If this is an impulse response, the size must match the created function table size. If a frequency response is used, then the created function size needs to be twice the size of this source. Power-of-two is required.

mode - optional, the operation mode, a sum of (a) input, frequency response (0) or impulse respone (1); (b) output, linear phase (0) or minimum-phase (2); (c) windowing, none (0), input (4) and/or output (8). The default mode (0) is frequency response input, linear-phase output, no windowing.

fwin - window function table, power-of-two size is required, but does not need to match the created function table size.

## Example

Here is a complete example of the GEN53 generator. It uses the file gen53.csd.

Example 1266. Example of the GEN53 generator.

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

    <CsoundSynthesizer>
    <CsOptions>
    -o dac
    </CsOptions>
    <CsInstruments>

    instr 1

    a1 diskin "fox.wav"
    a2 ftconv a1, p5, 256
       out a2*p4

    endin

    </CsInstruments>
    <CsScore>
    ; impulse response
    f1 0 131072 1 "ir.wav" 0 0 1
    ; minimum-phase version
    f2 0 131072 53 1 3

    ; Hann window
    f3 0 1024  20  1 1
    ; low-pass frequency response
    f4 0 1024 7 0 100 0 24 1 900 1
    ; low-pass linear-phase IR
    f5 0 2048 53 4 4 3

    ;        scale  IR
    i1  0  3 0.25   2
    i1  +  3 1      5
    </CsScore>
    </CsoundSynthesizer>

## Credits

Author: Istvan Varga

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