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| Function description | Use case description | Test results | Test result |
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| Select the track, pitch, and instrument of the score to be played | (1) Select an audio track, or not select an audio track, or select a specific audio track to display rendering | (1) After selecting the audio track to be used, all audio tracks will be displayed on the score. If no track is selected, the score is empty | Qualified |
| (2) Set different tones according to the audio track | (2) After setting different tones, the score will be displayed normally |
| (3) Set different instruments according to the audio track | (3) Set music when playing various instruments |
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| Loop playback of specific sections of the score | (1) Select a single area, multiple areas, all areas and zero areas for loop playback | (1) If one or more areas are selected, a single area is looped; if zero or all areas are selected, all areas are played | Qualified |
| (2) After selecting several areas, cancel all areas and play | (2) Play all |
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| Piano display and switching | (1) Cancel the piano display after changing the position | (1) Although the piano is hidden, the music score occupies the entire interface | Qualified |
| (2) After canceling the display, switch the position of the piano and the score | (2) The switch button is not active and cannot be switched |
| (3) If there is no music, please cancel the display | (3) The piano is hidden and the interface is empty |
| (4) There is no music when the position of piano and music is switched | (4) The switch button cannot be completed in the inactive state |
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| Scale of the score | (1) Expand the score | (1) After zooming in to a specific situation, you cannot zoom in again
(2) After locked to a certain level of LJ, no further reduction is allowed
(3) The operation cannot be completed when the zoom button is inactive | Qualified |
| (2) Reduce the score |
| (3) Zoom in or zoom out when there is no music |
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| Linked music score and piano playback | (1) If the link is over, cancel the display of the piano, and then return the display of the piano to its original position. | (1) Normally cancel and resume display after normal playback
(2) The reproduced sound will change when the sound is adjusted, and the speed will also change when the speed is adjusted
(3) After the change, the score will be reloaded and can continue to play together
(4) Except for some special musical scores, there are no problems with other musical scores. All vocalizations are normal | Qualified |
| (2) Adjust the reproduction speed and sound during link reproduction |
| (3) After playing the link, zoom in and zoom out the music |
| (4) When playing the link, switch the position of the score and piano |
| (5) When playing together, change the playing track, pitch, and instrument |
| (6) Play other music and confirm whether the display and sound of the music are correct |
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