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max-msp-jitterableton-live

How can I make this Max MSP/M4L patch update zl.len and zl.mth for an empty list?


Background

I'm trying to build a Max for Live device as a solution to the problem presented in this related question. As part of my solution I need to keep track of a group of notes (i.e. the selected, or in-scale notes).

My patch (see below) works great for any combination of held notes, but fails once the last note is released. When that happens, zl.len stays stuck at 1 and zl.mth continues to output whatever note was released last.

The question

How can I update my patch so that the length is 0 and the selected note is empty when the input list of held notes is empty?

What I have tried

I have tried banging the left inlet of the various zl objects manually and as part of the kslider update but this only produces the same unwanted behavior.

Here is a screen-shot of the patch:

Screen-shot of Max patcher

and here is the corresponding code:

----------begin_max5_patcher----------
917.3ocyX0zbaCBD8ryL4+.iN6jAPHaodr8P+AzicxjQePrIUB4AgRcal9eu
7gUrSprJJF5zKlQqA18s6agmzyWe0hnh18ztHvG.eErXwyJKKL1zVVLXXQTS
99x57NyDi38METQzxC+m5QFulJM+I5Dqs8xAy3AypoxZ5az1fKOt4C1Pur9c
4h7FpjJtmxyKpouZE1cV9icTajGEsDDUjy2DAtaXNrJSv1V73MIwQG2VY4VF
ey8BZoztXbRxsvk.BYkdHNV+KFeKDbmYM+55qzipgkNmgJaaZnb4KdUR2abV
zmZ64RfbKErkVWA3sRUxeXV0LNsTOgWkwbI8BGCz3o.8ZnArYFLmhLOPtHLW
zKks7YwJdmE6IJzvovLxVniIolRLY32PTn+nJFM0YcIFnfPzkVOIYSgsXnkD
mYpqnDy.FFFv8EpDv3Uz8f1G.UzNlfVA5Jyqo2ng6kC0zI6WyHmzuhxPAEps
BosMUgXPdWIkWoBGPqnZlGANJPWOMPOzWlY.55rPBzOKZ628lSlTPV1BxA0r
NOveSlj+d3zWHxVTiCM+cn2zTW0OX3uWNJm7pFBw1dptdIwWco+Obta7j20f
WYNvkj5uyc4zuq76eVY+Y8scpN1wyF3+h1jQUULNfwS23FSN4hFBxCJJNGfk
B1lMTAn38Q.lQMFSlDxqSsMtlCoRhCHj2ITGKA5n0JmSqt3NVLxgRYhkBmBC
HtTb2F41fScQYtfW6PPot153F88NWbQDs1AwQGT6tZUXKhSfHeVFW4P6XLzP
XSBeYrlx2bNx6bpiwNHfmfMfy1RFt5nBRguJ5zKrX4swq8.d+VWM6TkqsO7P
G03tUv2EXmmDBlVNlc3X9nosh9JdhPcIj0BdjbV5z5HMoLDz9hsjgaiB.EoH
eyr3GnIyJiSOb.pXqlRblVR4nrC6Va97Bu8K8X1V8e7lDPWaunbH7F9DJ.3w
fT8VeRFOWxTROONK8cK.zT4ZmcnVgkiN7jYYesLcx1CgfVUq6gfGb3aQy3NT
KXwSNzwjL7LIYrGBgD3bBAefYhSI40ADyNl1OWH.+mkEzhLBV6kigP.SBoNw
DHALGfbi8G6uiXVMG1uOb3b3YdplhbgTg7l67FG9vE04618DUzcXOr9VII4w
VyhRWZelwsOakUDInOwFVRh0TtPIYPpzKzKLgbz9UGdGdijKAumMvi0nW6Zi
pGtRPW2tbKNMpit9J0D9MXvABqM
-----------end_max5_patcher-----------

Solution

  • Indeed the only way to know if there is nothing in a zl group object is to somehow keep track of whether something came in.

    Here is an example that should do what you are looking for if I understand correctly:

    enter image description here

    ----------begin_max5_patcher----------
    1066.3ocwY1rbaaCDG+rzSAFdVQC9fe1iIGxCPO1wiGJQXYlRBpgDLUsYx6d
    AVPZoXCICYBxbQ1DBlK9s6+cwB3erdUvtlS7t.zef9KzpU+X8pUvP5AVM77p
    f57S6qx6foEH3+SytuErw7UR9IILrDsCUNNZYALlZdehMNlnutTTwkvagbdv
    ld43nzgQMCI+2ibyBKXWt3PvFTPoPYrGFl0wb49mKEGdrkuWZlHkw1Ri1fHL
    5V7FDMaq5Ap52QOn+a94505O1LMRsQI0JkTqTRtFkuGcDEcJpBYwyGbRD1VP
    L5NhhSkOFk.7QG+zm70wqPXDwFigVYjYkQ16oTG+oK.SS.fCCmCfslSxVP4J
    MjNmx0R6AShOJ6nI7dp5jk5CR6q2waGW9puprtuFV7j2xYzKQxi4s40bIu8Q
    tHeWEf.1C9fWDy2zCDEBdfHLFxfYmUxibTJF4.+AbJ6apq45nwqh+eooWHQx
    m4nm4UEHQiTsY1vjpJE785u+R9tz2QuCMB95vaJGGFBPmRFc.enf+tdorQXQ
    PGg8TflbyJW2LeFm.fhGRqG+7CA50BneVsJf3oNThTKRK9hvLOE3vCpVSkWR
    DHdoXOizexUUoDE7SnlmPE7txVdApaedE+SZHsAXpe.jlwtLsjjQlG.aZklT
    OEmn7t8bQgZgfZZKNWH6R7R7EdX.OVHT2kjjMK3801l9iupFiBTYCJGUU1YU
    gF4YBoCAP1roPGy4fXn9APgZiMlux9.XhX5cKmZt2Uqaxn+1qaRiSFJyP8Pg
    yqzHz+UssSkFZ6nII2Qyd2rM.mZBZHYLjLGMyBGxz5ITng2gpj4x4LcowOro
    vCFfMNaNP9XqZUfTGaQYUdgMxIdpVyP.L1bvqT7bPiRlVKe1BEjrEUkFkNip
    TSH6fdaCajl32tWXlMEhimo30U4HdYqqX1BLZFiXUbwA6hSOsk23E3XNueb5
    LEwTbXCB7hDuHQT8F5CmRfkLIF+6tpxK5gr4om53fchwuEvz6dmd57bc.lcE
    LnmFNzjyEGEtofeo7oUsoiY.p+jA6xOXSCrD26yKWGhQfGktMw18g.uB3P5u
    55mgWod7ek5tl918iqgg3M5rWUcvJYoHWVpZC77bzsEftl1yUCM9Rtokz2ol
    erD0EKQ7gkHumk7.RLG7cDOYGxBXG8Ew79xNenEbww4kHTzBQDYwbcIt3690
    Ui4xJzUCmjoScTFN072Hmxqx7fkXNU8KxGBQWpIoa6b5VxEuGyG6cvntFmlr
    kHtTQ2G6cvHtvT7hkHmYOQlr.lNwtowSqNYlK0I8wlYiAoaaoDeXIWR3dKRl
    lDyOd7671tgYC1P0D72Z.ec5l0l++RlGg1VCZ4eubb9lIj2p5SUpZRsuEVWA
    mhMWYDzOdqnubPynnSYRnAag5XDcGyMf.8gu9mq+eNu4kL.
    -----------end_max5_patcher-----------