Android Question SoundPool and CheckChange event

Sub Process_Globals
    'These global variables will be declared once when the application starts.
    'These variables can be accessed from all modules.
    Dim sp As SoundPool
    Dim BrownNoiseId As Int
    Dim BrownNoisePlayId As Int
End Sub

Sub Globals
    'These global variables will be redeclared each time the activity is created.
    'These variables can only be accessed from this module.
   
    Dim tbBrownNoise As ToggleButton
    Dim tbWhiteNoise As ToggleButton
End Sub

Sub Activity_Create(FirstTime As Boolean)

    Activity.LoadLayout("main")
   
    If FirstTime Then
        sp.Initialize(1)
        BrownNoiseId = sp.Load(File.DirAssets, "brown.ogg")
    End If
   

   
   
End Sub

Sub Activity_Resume
   
End Sub

Sub Activity_Pause (UserClosed As Boolean)
'    If UserClosed = True Then
'        sp.Stop(BrownNoiseId)
'    End If
End Sub

Sub tbBrownNoise_CheckedChange(Checked As Boolean)

    If Checked = True Then
        Log("brown noise on")
        BrownNoisePlayId=sp.Play(BrownNoiseId, 1, 1, 1, -1, 1)
    Else
        Log("brown noise off")
        'If sp.Is
        sp.Stop(BrownNoisePlayId)
    End If
End Sub

Sub tbWhiteNoise_CheckedChange(Checked As Boolean)
       
End Sub