metro2
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## metro2

metro2 — Trigger Metronome with Swing and Accents

## Description

Generates a metronomic signal with controllable swinging.

## Syntax

    ktrig  metro2  kfreq, kswing [, iamp, initphase]

## Initialization

iamp - off-beat click amplitude

initphase - initial phase value (in the 0 to 1 range)

## Performance

ktrig - output trigger signal

kfreq - frequency of trigger bangs in cps

kswing - value (in the 0 to 1 range)

metro2 is a modification of 'classic' metro opcode with additional swinging. The swinging clicks can be modulated at k-rate. Also, swinging clicks can have their own amplitude value set by iamp.

| Note
metro2 as well as metro will produce a trigger signal of 1 when its phase is exactly 0 or 1. If you want to skip the initial trigger, use a very small value like 0.00000001.

## Examples

Here is an example of the metro2 opcode. It uses the file metro2.csd

Example 589. Example of the metro2 opcode.

    <CsoundSynthesizer>
    <CsOptions>
    -odac ; for RT audio
    </CsOptions>
            <CsInstruments>

    sr = 44100
    ksmps = 16
    nchnls = 2
    0dbfs = 1.0

    ga1 init 0   ; delay aux

    instr 1 ; main triggering instrument
    kndx init 0
    kndx2 init -1
    ; the clicks are 1/16th notes @ 137 BPM
    kT metro2 (4*137/60), p4, -1
    if (kT == 0) goto Halt
    	k1 table kndx, 1, 0, 0, 1
    	kndx += 1
    	if (k1 == 0) goto Next
    		event "i", 2, 0, 0.35, k1
    Next:
    ; positive amplitude values of down-beat clicks
    ; are used to trigger kick (instr 3)
    if (kT < 1) goto Halt
    	kndx2 += 1
    	kndx2 wrap kndx2, 0, 2
     	if kndx2 != 0 goto Halt
    	event "i", 3, 0, 0.2
    Halt:
    endin

    instr 2  ; simple subtractive bass
    kAE linsegr 0, 0.005, 1, p3/2, .7, .04, 0, .04, 0
    kFE linsegr 1, 0.005, 2, p3/2, .7, .04, .1, .04, .1
    ifr = cpspch(p4)
    a1 vco2 1, ifr
    a2 vco2 1, ifr * 1.005
    a3 vco2 1, ifr * 0.993
    aM = (a1+a2+a3)/3
    aM moogvcf aM*kAE, 1000 * kFE, 0.5
    outs aM, aM
    ga1 += aM * 0.25
    endin

    instr 3 ; simple techno kick
    k1 linseg 200, p3, 10
    k2 linseg 0,0.001,1,0.25,0
    a1 oscil 0.3*k2, k1
    outs a1,a1
    endin

    instr 99 ; feedback delay for bass
    a1 delayr 0.5
    ab deltap 0.33
       delayw ga1 + ab*0.3
    outs ab,ab
    ga1 = 0
    endin

    </CsInstruments>
    <CsScore>
    t 0 137
    ; ftable1 is the bass sequence to played with various swings
    f1 0 16 -2 6.00 0 0 7.00 0 0 6.00 0 6.00 0 0 7.00 0 7.01 6.00 0
    ; 4 measure pattern of different swinging
    i1 0 16 0.5
    i1 + .  0.65
    i1 + .  0.4
    i99 0 46
    </CsScore>
    </CsoundSynthesizer>

## See also

Sensing and Control: Tempo and Sequencing

## Credits

Author: Gleb Rogozinsky;
St.Petersburg, October 2019

New in Csound version 6.14

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