Android Question Set Volume Programatica[ly

Roger Daley · Nov 29, 2022

Hi All,

I am trying to set the volume a Beep is played at and then restore the volume. I thought this would be simple but the compiler doesn't like my code.
It looks straight forward but I'm missing something.
Any help much appreciated.

The relevant part of code.

Adjust volume:

VolMus = Beep1.VOLUME_MUSIC        'Save current volume setting in integer '
Beep1.VOLUME_MUSIC = 5                  'Set volume for Beep1'
Beep1.Beep
Sleep(21)
Beep1.VOLUME_MUSIC = VolMus       'Restore setting'

The Compiler shows the following:

Compiling generated Java code. Error
B4A line: 5974
Beep1.VOLUME_MUSIC = 5
src\b4a\configulator_calculator\main.java:9066: error: cannot assign a value to final variable VOLUME_MUSIC
parent.mostCurrent._beep1.VOLUME_MUSIC = (int) (5);

I've searched the Forum but failed.
Thanks in advance

Regards Roger

Erel · Nov 29, 2022

VOLUME_XXX are constants that are passed to Beeper.Initialize2. They set the voice channel.

You can se the volume with Phone.SetVolume. Make sure to wrap it in a Try / Catch block as there are cases where it will throw an exception.

Roger Daley · Nov 29, 2022

Erel said:
VOLUME_XXX are constants that are passed to Beeper.Initialize2. They set the voice channel.

You can se the volume with Phone.SetVolume. Make sure to wrap it in a Try / Catch block as there are cases where it will throw an exception.

Thanks Erel,

I will give it a try.
It seems an odd way to go when there is "XXXX.VOLUME_MUSIC".
I don't think Beep comes through the Voice Channel, but through the Music channel.

Regards Roger

Roger Daley · Nov 29, 2022

Can anyone point me towards a working example of setting the volume for BEEP and restoring Volume Setting after beep?

Regards Roger

kimstudio · Nov 29, 2022

Beep generates a SINE or PULSE wave internally according to frequency and play it with a certain amplitude, so @Erel can add a new parameter as volume for example between 0 to 1 and multiply it to the wave samples generated to control the Beep volume. It is the tiniest thing for Erel to make but it will change the Audio library API.

Android Question Set Volume Programatica[ly

Roger Daley

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Erel

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Roger Daley

Well-Known Member

Roger Daley

Well-Known Member

kimstudio

Active Member

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