I made a piano app (and want to play back a List of saved note sound files)

[_lee]

I saved the notes I played in Label and I want to play them again. No record. Please help me using blocks.
MyPiano_template_MS.aia (2.1 MB)

[SteveJG]

perhaps see

The my piano app template does not have the media files with the notes

Not sure what app you are trying to build. This piano app has note sound files included: https://gallery.appinventor.mit.edu/?galleryid=842f7a50-fb12-4fa4-a5fc-01598fb62723 The files are in Media [notes] Is this what you needed?

[_lee]

That's right, but I want to create a function that replays the order saved in the Label after pressing the key.

[SteveJG]

@_lee

replays the order saved in the Label after pressing the key.

Try techniques discussed in

Sound Doesn't Play from Name in List

Hi, I'm trying to make a digital piano with a feature to "record" the notes you played. I have a procedure (keyPressed) that adds the note pressed to a list, but when I play use the play button (when PlayButton.click) it gives an error "Error 703: Unable to play [Note].mp3" where [Note] is the last note item in the list [Screen Shot 2020-12-27 at 11.58.59 PM] Update: I changed it so all the notes in variable notes are "[Number].mp3", and removed the join in the set NoteSound.Source so its j…

or

Play A Sequence of Notes Using Any-Component Blocks

Trying Any Component feature usage to reduce repetitive code. See aia file and url. Screen1 colour_buttons works OK. Screen1 code plays the note sequence listed for the three buttons. Screen2 attempts at Any-Component code for identical operation not successful. http://ai2.appinventor.mit.edu/reference/other/any-component-blocks.html Play_Note_Sequence.aia ~ Play_Note_Sequence.aia - Google Drive

[_lee]

i go try now

[_lee]

just block adding please not add record button
i think i push the piano button and label has piano value so replay button click and
play piano value 0.5ms

[_lee]

Runtime Error
RuntimeError. Irritants: (The operation < cannot accept the arguments: , [1], [(DNote.wav ENote.wav FNote.wav)] Bad arguments to <)
Note: You will not see another error reported for 5 seconds. this is my poroject sir
MyPiano_template_MS01_copy.aia (2.1 MB)

[AyProductions]

Are you using iOS per any chance?

[uskiara]

As far as I can understand from your source, you use the following comparison:

related to two filenames

You create a filename with these blocks:

the filename is then added to a list:

But the comparison "<" is a blue block, thus intended to be used with numbers and not strings.
I suggest that you make a cross-reference table between filenames and a list of numbers, something like:
noteAfilename.wav -> 1
noteBfilename.wav -> 2 etc.
To this purpose you can use the Dictionary blocks.
Best wishes.

[ABG]

You are missing the Length of List block in your comparison notesCNT vs notesLIST .

If notesCNT < Length of List (notesLIST)then ...

[SteveJG]

@_lee

RuntimeError. Irritants: (The operation < cannot accept the arguments: , [1], [(DNote.wav ENote.wav FNote.wav)] Bad arguments to <)

You are using App Inventor for ios. How do I know? Your error message is RuntimeError. Irritants: (The operation < cannot accept the arguments: , [1], [(DNote.wav ENote.wav FNote.wav)] Bad arguments to <)

ios Project error messages contain the key word Irritants.

Does your Project run in the emulator or on an Android device?