The first track specified in alphaTex is being rendering up an octave

[dgriessler]

Your environment

• Version used: (master branch) debug
• Platform used: JavaScript or C# JavaScript
• Rendering engine used: SVG (default), HTML5 or GDI SVG
• Browser Name and Version: Firefox 69.0.3 x64
• Operating System and version (desktop or mobile): Windows x64 Windows
• Link to your project: https://github.com/dgriessler/TestHost/tree/gh-pages Viewable at: https://dgriessler.github.io/TestHost/

Expected Results

When d3 is specified as a note, it should be rendered and drawn at d3.

Observed Results

Only for the first track, the entire first track is being drawn up the octave. I had to make the alphaTex have the values down the octave so it would get drawn in the right spot. This is easily heard when you play it back, it is playing in the 3rd octave which is unexpected. The other tracks are drawn and playback correctly.

Steps to Reproduce (for bugs)

1. Define some alphaTex:

   \title "Down by the Riverside"
   \subtitle "Arranged by: Brant Adams. B.M.I."
   \tempo 84
   .
   
   \track "Soprano"
   \staff {score} \tuning piano \instrument acousticgrandpiano \ks G
   r.1 |
   r.2 :4 d3 e3 |
   g3{d}.2 :8 g3{-} a3 |
   b3{d}.2 :8 b3{-} r |
   \ts 2 4 :4 b3 a3 |
   \ts 4 4 g3.1 |
   :8 e3 d3 d3{- d}.2 :8 d3{-} r |
   \ts 2 4 :4 d3 e3 |
   \ts 4 4 g3{d}.2 :8 g3 a3 |
   :2 b3 a3 |
   g3.1 |
   \tempo 88
   \ts 4 4 :2 g3{-} r |

2. Render using alphaTab
3. Observe that all the notes are being drawn up one octave but are being played back as their correct octave.

Possible Solution

I'm still debugging to try and track down the source of the problem. Since the midi is being generated correctly, I assume this is a rendering issue.

[dgriessler]

You can also view my project https://dgriessler.github.io/TestHost/ which shows this bug happening.

[Danielku15]

I will need to double check this in detail. There are some rules that depending on the instrument rendering might appear to be 1 octave shifted, but this is actually expected as for various stringed instruments the standard notation is shifted by 1 octave.

[dgriessler]

You can actually see this happening in your documentation in the Staves example it says "c4 d4 e4 f4" but what is drawn is "c5 d5 e5 f5" https://docs.alphatab.net/develop/alphatex/tracks-staves

[Danielku15]

With the adding of multistaff and track support some instrument detection got messed up. For the first staff the alphaTex importer thought it is a Guitar track which renders notes 1 octave higher compared to piano tabs. The problem is fixed in the latest build.