-
Welcome to B4X forum!
B4X is a set of simple and powerful cross platform RAD tools:
- B4A (free) - Android development
- B4J (free) - Desktop and Server development
- B4i - iOS development
- B4R (free) - Arduino, ESP8266 and ESP32 development
$25 : A Piano Sample
- Thread starter Ohanian
- Start date
- Similar Threads Similar Threads
You should use a sound generator. I tried the Beeper object of the Audio library; result: very bad
... and using this library?
(or this code from StackOverflow:
B4X:
public class PlaySound extends Activity {
// originally from http://marblemice.blogspot.com/2010/04/generate-and-play-tone-in-android.html
// and modified by Steve Pomeroy <[email protected]>
private final int duration = 3; // seconds
private final int sampleRate = 8000;
private final int numSamples = duration * sampleRate;
private final double sample[] = new double[numSamples];
private final double freqOfTone = 440; // hz
private final byte generatedSnd[] = new byte[2 * numSamples];
Handler handler = new Handler();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
@Override
protected void onResume() {
super.onResume();
// Use a new tread as this can take a while
final Thread thread = new Thread(new Runnable() {
public void run() {
genTone();
handler.post(new Runnable() {
public void run() {
playSound();
}
});
}
});
thread.start();
}
void genTone(){
// fill out the array
for (int i = 0; i < numSamples; ++i) {
sample[i] = Math.sin(2 * Math.PI * i / (sampleRate/freqOfTone));
}
// convert to 16 bit pcm sound array
// assumes the sample buffer is normalised.
int idx = 0;
for (final double dVal : sample) {
// scale to maximum amplitude
final short val = (short) ((dVal * 32767));
// in 16 bit wav PCM, first byte is the low order byte
generatedSnd[idx++] = (byte) (val & 0x00ff);
generatedSnd[idx++] = (byte) ((val & 0xff00) >>> 8);
}
}
void playSound(){
final AudioTrack audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC,
sampleRate, AudioFormat.CHANNEL_CONFIGURATION_MONO,
AudioFormat.ENCODING_PCM_16BIT, numSamples,
AudioTrack.MODE_STATIC);
audioTrack.write(generatedSnd, 0, generatedSnd.length);
audioTrack.play();
}
}[Very nice formatting
]
Last edited:
ok my friend, i had to create a complete new project and do it in a different way but now it supports Multi Touch.
i hope you like it.
consider the hard work i did
tell me if its working, you will need the Gestures Lib: https://www.b4x.com/android/forum/threads/gestures-multi-touch-library.7421/#content from @agraham
have fun
EDIT: new version, fixed a small performance issue
Last edited:
Yes better grab smaller size and better tones. But that should not be a hard mission
In fact I think @Ohanian needed the graphics, more than anything else.Yes better grab smaller size and better tones. But that should not be a hard mission
No he needed the code not the graphics or sound files.
I meant: the graphic part (code)
Hi,
You’re a rapid coder
I just need the code, the graphic is already done, and the app is published, we’re improving it according to user’s feedback.
It’s weekend here, so please wait a few days for a feedback. But it seems ok for me.
And if you’re interested here’re some screenshots.
You’re a rapid coder
I just need the code, the graphic is already done, and the app is published, we’re improving it according to user’s feedback.
It’s weekend here, so please wait a few days for a feedback. But it seems ok for me.
And if you’re interested here’re some screenshots.
Attachments
Hi,
You’re a rapid coder
I just need the code, the graphic is already done, and the app is published, we’re improving it according to user’s feedback.
It’s weekend here, so please wait a few days for a feedback. But it seems ok for me.
And if you’re interested here’re some screenshots.
i like the graphics, are you drawing them by yourself?