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POLags while playing 2 sounds on the same time in timer
 

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  1. POLags while playing 2 sounds on the same time in timer
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    <p>I have a small app that basically sets up a <strong>timer</strong> and plays <strong>sets of 2 sounds one after another</strong>.</p> <p>I've tried 2 timers, because I wanted both sounds to start exactly at the same time each time. I gave the app 500ms for setting both timers before they start</p> <pre><code> Calendar cal = Calendar.getInstance(); Date start = new Date(cal.getTime().getTime() + 500); timerTask1 = new TimerTask() { //1st timer @Override public void run() { soundManager.playSound(1); } }; timer1 = new Timer(); timer1.schedule(timerTask1, start, 550); timerTask2 = new TimerTask() { //2nd timer @Override public void run() { soundManager.playSound(2); } }; timer2 = new Timer(); timer2.schedule(timerTask2, start, 550); } </code></pre> <p>soundManager is a <strong>SoundManager</strong> object which is based on <a href="https://stackoverflow.com/questions/3039078/playing-multiple-sounds-using-soundmanager/3763993#3763993">this tutorial</a>. Thew only change I've made was decreasing number of avalible streams from 20 to 2 since I play only 2 sounds at the same time.</p> <p>Now the problem. <strong>It's not playing at the equal rate</strong> neither on my Motorola RAZR or the emulator. The app slows sometimes, making a longer brake than desired. I can't let that happen. What could be wrong here?</p> <p>I'm using very short sounds in <strong>OGG</strong> format</p> <p>EDIT: I've made some research. Used 2 aproaches. I was measuring milisecond distances between sound was fired. Refresh rate was 500 ms.</p> <ul> <li>1st aproach was TimerTask - it is a big fail. It started at 300ms, then was constantly growing, and after some time (2 mins) stabilized at 497ms which would be just fine if it started as that.</li> <li>2nd aproach was while loop on AsyncTask - it was giving me outputs from 475 to 500ms which is better than TimerTask but still inaccurate</li> </ul> <p>At the end none of aproach was playing smoothly. There were always lags</p>
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    1. COFirst, `TimerTask` is not guaranteed to be real-time, so I can well imagine something interrupting your process in the 50 milliseconds between each sound. Second, it seems that calling `soundManager.playSound(1);` then `soundManager.playSound(2);` [will play sequentially](http://stackoverflow.com/questions/4342491/how-to-sync-sounds-using-soundpool).
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    2. COnote that both sounds are played from separated threads, so I hoped they start in the exact same time, since they were give same start time. What would be some equivalent for timer task then?
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    3. COWhat is the size of the each ogg file
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      1. USSherif elKhatib
 

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