MusicXML: scoop, plop, doit and falloff are not shown #3009

If a MusicXML file with a scoop is imported to alphaTab, the scoop doesn't come through. I'm working on a dobro-related project, so I have lots of scoops in my tabs. (Per the AI description below, this is also true for plop, doit and falloff articulations.) I have a PR ready to open if I get the okay.

-Sage

(AI-drafted details below)

Is there an existing issue for this?

• I have searched the existing issues

I have read the contribution rules

• I have read CONTRIBUTING.md and, if any AI agent helped draft this issue, AGENTS.md.

AI authorship

AI-assisted (disclosure block included as described in AGENTS.md)

Current Behavior

Drafted with an AI assistant

A note with <scoop/> in its <articulations> is drawn with no mark: no line rising into the note, on a standard
staff or on tab. The same holds for <plop/>, <doit/> and <falloff/>. Loaded through the API, the note's
slideInType and slideOutType stay None.

alphaTab's own reference image for the MusicXML test suite file 32a-Notations.xml shows it: the notes labelled
"scoop", "plop", "doit" and "falloff" in bars 4 and 5 have no mark. The MusicXML feature table lists the four as not
supported.

Expected Behavior

MusicXML defines the four as indeterminate slides
(scoop: "an indeterminate slide attached
to a single note. The scoop appears before the main note and comes from below the main pitch"; plop from above; doit
and falloff after the note, up and down). alphaTab already draws and plays slides into and out of a note from Guitar
Pro and alphaTex files, so a scoop would show as a slide into the note from below, a plop from above, a doit as a
slide out upwards and a falloff downwards.

Steps To Reproduce

1. Load this file (or packages/alphatab/test-data/musicxml-testsuite/32a-Notations.xml, bars 4 and 5):

<?xml version="1.0" encoding="UTF-8"?>
<score-partwise version="4.0">
  <part-list><score-part id="P1"><part-name>Voice</part-name></score-part></part-list>
  <part id="P1">
    <measure number="1">
      <attributes>
        <divisions>1</divisions>
        <time><beats>4</beats><beat-type>4</beat-type></time>
        <clef><sign>G</sign><line>2</line></clef>
      </attributes>
      <note>
        <pitch><step>D</step><octave>5</octave></pitch><duration>1</duration><type>quarter</type>
        <notations><articulations><scoop/></articulations></notations>
      </note>
      <note>
        <pitch><step>D</step><octave>5</octave></pitch><duration>1</duration><type>quarter</type>
        <notations><articulations><plop/></articulations></notations>
      </note>
      <note><rest/><duration>2</duration><type>half</type></note>
    </measure>
  </part>
</score-partwise>

2. Look at the first two notes: neither has a slide-in line.
3. In Node: alphaTab.importer.ScoreLoader.loadScoreFromBytes(bytes, new alphaTab.Settings()), then read
   score.tracks[0].staves[0].bars[0].voices[0].beats[0].notes[0].slideInType: it is 0 (SlideInType.None).

Link to jsFiddle, CodePen, Project

No response

Version and Environment

[AlphaTab][VersionInfo] alphaTab 1.9.0
[AlphaTab][VersionInfo] commit: 9f1aa10460df1b326123d28a2222f7b20d081e61
[AlphaTab][VersionInfo] build date: 2026-10-31T21:16:42.187Z
[AlphaTab][VersionInfo] High DPI: 1
[AlphaTab][VersionInfo] Platform: NodeJs
[AlphaTab][VersionInfo] WebPack: false
[AlphaTab][VersionInfo] Vite: false
[AlphaTab][VersionInfo] Turbopack: false

Also seen in 1.8.4.

Platform

Node.js

Anything else?

Related: #2850 (other MusicXML articulations not imported).