B4A Library Audio library v1.2 - Beeper

Measuring with a standalone tuner and a software tuner on my pc.

I have also checked on another Android phone and have the same results.

This seems like a system limitation.

Ok, thanks for looking into it.

Waveform generation

:sign0163:
Can anyone help me to generate Sine, Square, Triangle, awtooth and Pulse waveform (with variable frequency and amplitude) using Beeper or any other means using Basic4abdroid?
Thanks in anticipation,
Murugesan
Lecturer
Arasan Ganesan Polytechnic College
Sivakasi
Tamilnadu
India

Have a look at the AudioTrack library here

The swt1-3.zip demo app creates a sine wave which you can use as a basis for the rest of your needs.

Multiple sounds

Hi all,

I am quite new here. Have been programming for several years but still getting into android apps, and a lot to learn

I am writing a small app in which there is a drawed keyboard, and want it to sound as the user touches the different keys

As a very first approach i have used the beeper. I created an array of 14 beepers, each one with a different frequency and 300msec. When I hit the keyboard it sounds. If I hit a second key, it sounds the new beeper, even if the previous one isn't finished

When do this (start one beep before the previous one has ended) sometimes my device reboots. I don't know if it is due to the fact that beeper does not support simultaneous plays of instances to this object or something more in my app. Is this the point or am I missing something?

Also, in the future I would like the app to play different "custom" sounds (previously stored as a file) assotiated to each key in the keyboard, and I want to be able to play some (different channels) of them at the same time:

> which file format is more suitable (requires less memory and/or less processing for the device) for this purpose?
> which player object would you recommend, also taking into account memory and performance issues?

Any advice would be welcome :sign0163:


Jordi

Hi Jordi,

Have a look at soundpool using Ogg sounds. That will easily accomplish what you are after.

via Tapatalk

I tried it and it works perfect for my purposes

Thanks a lot!

Is there a way to play 2 beeps after each other without them interfering? I'm not trying to make a full synthesizer, I just want the option of 'beep' or 'beep__beep'

Thanks for any help

Please start a new thread for this question.