iPhone SDK Play sound using AudioServicesPlaySystemSound Method
March 22, 2009 § 13 Comments
Getting audio to play is one of the most tricky businesses in iPhone SDK development. AudioServicesCreateSystemSoundID is designed to play 30 sec or less audio file using AudioToolbox framework.
You would have to add this line to include AudioToolbox framework on your MainViewController.m source file.
#import <AudioToolbox/AudioToolbox.h>
I would like to show the easiest way to play the sound without using memory or specific the exact audio file path. You can place the audio file according to your preferences, preferably under Resources folder. This example uses a Interface Builder button UIButton soundButton to trigger the sound. It will locate the alert.wav and use AudioServicesPlaySystemSound to play the sound.
– (IBAction)soundButton:(id)sender {
NSString *soundPath = [[NSBundle mainBundle] pathForResource:@”alert” ofType:@”wav”];
SystemSoundID soundID;
AudioServicesCreateSystemSoundID((CFURLRef)[NSURL fileURLWithPath: soundPath], &soundID);
AudioServicesPlaySystemSound (soundID);
[soundPath release];
}
Web Builders 
H,
This is a wonderful post from you…
Thanks very much
thanks a lot
Finally no more leaking on my code.
But i got a question.
Why would u release the “soundPath” when u don’t allocate it. I mean i know it’s the correct way, I am just trying to understand
thanks
The posted way works pretty good but if you want to play longer audio files or mp3 you will need to include AVFoundation. I posted the code necessary to play the music on my homepage:
Just goto http://www.bhuio.com goto code, follow the steps and copy the source code. If you have any questions contact me mail@bhuio.com.
Good luck, Ben.
I actually tried exactly this code, and cannot get the sound to play on either the simulator or an iPod touch device. Perhaps there’s a system/simulator setting that needs to be in place to get it working? Help?
It could be your audio source, format and type. QA your audio using workable code to narrow down problem areas.
Your line does *NOT* add the framework:
> You would have to add this line to include AudioToolbox
> framework on your MainViewController.m source file.
> #import
Do you even know what “frameworks” are????
> [soundPath release];
Why are you releasing something that you have NEVER alloc’ed????
(My students are learning all the worst errors, from this site.)
May I ask which school are you teaching? What grade are your students?
The iPhone SDK docs suggest that the iPhone is happiest with 16-bit Little-Endian Linear PCM audio in a ‘caff’ data format. One way you can create a ‘.caf’ file from your audio is to use ‘afconvert’ from the command line in a terminal window.
For details about afconvert – type “afconvert -h > ~/Desktop/afconvert.txt” to create a text file on your desktop with all of the details.
Once example I have used is:
$ cd [path of my original audio file]
$ afconvert -v -f ‘caff’ -d ‘LEI16’ mybeep.aif mybeep.caf
Hi!
when I build and rund the code i have this error:
“_OBJC_CLASS_$_AVAudioPlayer”, referenced from:
Objc-class-ref-to-AVAudioPlayer in MyappViewController.o
Symbol(s) not found
Collect2: Id returned 1 exist stats
meaby you can help me, I’m new with this and I’m ussing the 4.2 Xcode Simulator
Sorry for my bad english.
I hope you can help me
It’s difficult to troubleshoot without reading your code or viewing xcode. I am guessing you mess up the audio object or id
thnx dear
this is fantastic code
Hi, yup this post is truly fastidious and I have learned lot of
things from it on the topic of blogging. thanks.