Help Please, Playing A Short Sound Tutorial Not Working

[GabeJacobs]

I've looked at the "Playing A Short Sound" tutorial many times, making sure all my code is correct. My code compiles, but I hear no sound. I think something may have changed with the new SDK..

anyways, here is my code, please help.

MainView.H

#import <UIKit/UIKit.h>
#import <Foundation/Foundation.h>

@class SoundEffect;

@interface MainView : UIView {
    IBOutlet UIImageView *thunderImage;
	SoundEffect *soundEffect;
}

@end

MainView.M

#import "MainView.h"
#import "SoundEffect.h"

@implementation MainView 

-(void) awakeFromNib {


	NSBundle *mainBundle = [NSBundle mainBundle];
	soundEffect = [[SoundEffect alloc] initWithContentsOfFile:[mainBundle pathForResource:@"cat" ofType:@"wav"]];
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

	[soundEffect play];
}

SoundEffect.H

#import <UIKit/UIKit.h>
#import <AudioToolbox/AudioServices.h>


@interface SoundEffect : NSObject {
	SystemSoundID soundID;
}
- (id) initWithContentsOfFile:(NSString *)path; 
-(void)play;

@end

SoundEffect.M

#import "SoundEffect.h"


@implementation SoundEffect

- (id) initWithContentsOfFile:(NSString *)path;
{
	self = [super init];
	if (self != nil) {
		NSURL *filePath = [NSURL fileURLWithPath: path isDirectory:NO];
		
		AudioServicesCreateSystemSoundID((CFURLRef)filePath, &soundID);
		}
		return self;
}

		
-(void)play { 
			
			AudioServicesPlaySystemSound(soundID); 
		}
		
		
		
		@end

Any help would be greatly appreciated. Thank you

[bhearn]

This code works for me:

SystemSoundID train;

AudioServicesCreateSystemSoundID(CFBundleCopyResourceURL(CFBundleGetMainBundle(), CFSTR("train2"), CFSTR("wav"), NULL), &train);

AudioServicesPlaySystemSound(train);

It did take a fair amount of fiddling and googling to get it to work the first time!

[11111111]

Originally Posted by GabeJacobs

I've looked at the "Playing A Short Sound" tutorial many times, making sure all my code is correct. My code compiles, but I hear no sound. I think something may have changed with the new SDK..

anyways, here is my code, please help.

MainView.H

#import <UIKit/UIKit.h>
#import <Foundation/Foundation.h>

@class SoundEffect;

@interface MainView : UIView {
    IBOutlet UIImageView *thunderImage;
	SoundEffect *soundEffect;
}

@end

MainView.M

#import "MainView.h"
#import "SoundEffect.h"

@implementation MainView 

-(void) awakeFromNib {


	NSBundle *mainBundle = [NSBundle mainBundle];
	soundEffect = [[SoundEffect alloc] initWithContentsOfFile:[mainBundle pathForResource:@"cat" ofType:@"wav"]];
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

	[soundEffect play];
}

SoundEffect.H

#import <UIKit/UIKit.h>
#import <AudioToolbox/AudioServices.h>


@interface SoundEffect : NSObject {
	SystemSoundID soundID;
}
- (id) initWithContentsOfFile:(NSString *)path; 
-(void)play;

@end

SoundEffect.M

#import "SoundEffect.h"


@implementation SoundEffect

- (id) initWithContentsOfFile:(NSString *)path;
{
	self = [super init];
	if (self != nil) {
		NSURL *filePath = [NSURL fileURLWithPath: path isDirectory:NO];
		
		AudioServicesCreateSystemSoundID((CFURLRef)filePath, &soundID);
		}
		return self;
}

		
-(void)play { 
			
			AudioServicesPlaySystemSound(soundID); 
		}
		
		
		
		@end

Any help would be greatly appreciated. Thank you

make sure that u only tab once within braces (statements in your method)
see highlighted red

[mxweas]

I haven't looked at the code, but if you're testing on an iPhone make sure the silent ringer switch isn't set to vibrate.

Max

[refreshe]

Try using the SoundEffect class files from the metronome example from Apple. It has some console messages that are printed if there's a problem loading sound files etc. It could give you a better idea of what's going wrong.


SoundEffect.h

#import <UIKit/UIKit.h>
#import <AudioToolbox/AudioServices.h>

@interface SoundEffect : NSObject {
    SystemSoundID _soundID;
}

+ (id)soundEffectWithContentsOfFile:(NSString *)aPath;
- (id)initWithContentsOfFile:(NSString *)path;
- (void)play;

@end

SoundEffect.m

#import "SoundEffect.h"

@implementation SoundEffect
+ (id)soundEffectWithContentsOfFile:(NSString *)aPath {
    if (aPath) {
        return [[[SoundEffect alloc] initWithContentsOfFile:aPath] autorelease];
    }
    return nil;
}

- (id)initWithContentsOfFile:(NSString *)path {
    self = [super init];
    
    if (self != nil) {
        NSURL *aFileURL = [NSURL fileURLWithPath:path isDirectory:NO];
        
        if (aFileURL != nil)  {
            SystemSoundID aSoundID;
            OSStatus error = AudioServicesCreateSystemSoundID((CFURLRef)aFileURL, &aSoundID);
            
            if (error == kAudioServicesNoError) { // success
                _soundID = aSoundID;
            } else {
                NSLog(@"Error %d loading sound at path: %@", error, path);
                [self release], self = nil;
            }
        } else {
            NSLog(@"NSURL is nil for path: %@", path);
            [self release], self = nil;
        }
    }
    return self;
}

-(void)dealloc {
    AudioServicesDisposeSystemSoundID(_soundID);
    [super dealloc];
}

-(void)play {
    AudioServicesPlaySystemSound(_soundID);
}

@end

Playing sound

SoundEffect *soundEffect = [[SoundEffect alloc] initWithContentsOfFile:[mainBundle pathForResource:@"sound1" ofType:@"caf"]];

[soundEffect play];

[GabeJacobs]

@bhearn where would I put that code, and in place of what?

@11111111 the highlighted red does not seem to be different from what I already have.

@mxweas I am testing on the simulator

@refreshe I am not good enough at Objective-C to to see what I am doing wrong. The metronome app is too confusing for me to understand how that can relate to mine.

I am totally stuck....

[bhearn]

Originally Posted by GabeJacobs

@bhearn where would I put that code, and in place of what?

Well to start with, put it anywhere you want a sound played! If it works for you, then you can sort it out into your class structure. Start simple.

I load the sound in my view's initWithFrame: , and store it in a view member.

[refreshe]

Originally Posted by GabeJacobs

@refreshe I am not good enough at Objective-C to to see what I am doing wrong. The metronome app is too confusing for me to understand how that can relate to mine.

Well I posted the relevant code for SoundEffect.h & SoundEffect.m files from the metronome app. Just replace your SoundEffect.h/m code with those.
They're basically the same, except they'll spit out some error messages if they exist.
Open the console when you build your app and see if any error messages show up.

Apart from errors in loading the sound, is the sound file itself compatible?


It should be under 5 seconds or it won't play using this playback method. Also maybe try converting it to apple's preferred .caf format instead of .wav
Apple have instructions in the dev center to go about doing this using a Terminal command.

[GabeJacobs]

Sorry guys, this was totally my fault. The sound file was created wrong. Instead of exporting in wav, I simple renamed it from a mp3. It works now, sorry about that

[MattCairns]

By the way... if you compile it on your iphone make sure its not on vibrate otherwise you won't hear the sound lol.

When I tried playing sounds i seriously thought it was the code and spent like 2 hours trying to figure it out then it turned out my phone was muted lol.

[robertpgg]

Originally Posted by MattCairns

By the way... if you compile it on your iphone make sure its not on vibrate otherwise you won't hear the sound lol.

When I tried playing sounds i seriously thought it was the code and spent like 2 hours trying to figure it out then it turned out my phone was muted lol.

At least your app responds to that mute. I hate it when apps don't!

[bladeolson]

any way to get it to play the sound in a loop? and stop playing when a button is pressed?

[roberthuttinger]

so can you post the working code? Im still trying to get a simple sound to play on a button press) (3 days later)

tia
rob

[roberthuttinger]

So after all this Ive followed the tutorial 2x now and after it goes thru the first wave of build, I get these errors:

"Linking /Users/foobar/Document/xcode/Debug-iphonesimulator/Sounds.app/Sounds
_AudioServicesPlaySystemSound", referenced from:
-[SoundEffect play] in SoundEffect.o
"_AudioServicesCreateSystemSoundID", referenced from:
-[SoundEffect initWithContentsOfFile:] in SoundEffect.o
symbol(s) not found

:gun to my head: inevitably when I think Ive got it working I hit this wall? any suggestions?

tia rob

[roberthuttinger]

So when I added the framework I had copy if needed checked, I deleted the framework, readded, then unchecked the copy if needed box after reimporting. the app works exactly as it should now.

[MikeBlah]

Originally Posted by roberthuttinger

So when I added the framework I had copy if needed checked, I deleted the framework, readded, then unchecked the copy if needed box after reimporting. the app works exactly as it should now.

glad you added this. i had the same problem and deleted and added without the copy and it worked for me too.

thanks!

[kgodard]

I've found all my sound issues to be much easier using the AVAudioPlayer. It requires 2.2.1, but that's not such a big deal. I've got more information on it here.

[sds65805]

Originally Posted by roberthuttinger

So when I added the framework I had copy if needed checked, I deleted the framework, readded, then unchecked the copy if needed box after reimporting. the app works exactly as it should now.

MY! MY! MY!
Fought with this all day before I found this post. Delete and readd worked like a champ.
Thanks

[SammySellers]

I did everything perfectly like the tutorial said. It works fine, absolutely no errors. I checked the code multiple times and it's exactly the way it should be. The sound works perfectly on the iphone 3.0 SIMULATOR. But when i put it on the device the sounds do not come out. I also checked to make sure the vibrate was OFF.... Any ideas?

thanks!

[ghost]

Originally Posted by bhearn

This code works for me:

SystemSoundID train;

AudioServicesCreateSystemSoundID(CFBundleCopyResourceURL(CFBundleGetMainBundle(), CFSTR("train2"), CFSTR("wav"), NULL), &train);

AudioServicesPlaySystemSound(train);

It did take a fair amount of fiddling and googling to get it to work the first time!

I'm running this and I can't get any sound output from my simulator OR iphone. There are no errors or warning though. Maybe my wav file is bad? How can I check that?

[shiva.0537]

Originally Posted by SammySellers

I did everything perfectly like the tutorial said. It works fine, absolutely no errors. I checked the code multiple times and it's exactly the way it should be. The sound works perfectly on the iphone 3.0 SIMULATOR. But when i put it on the device the sounds do not come out. I also checked to make sure the vibrate was OFF.... Any ideas?

thanks!

Some times some formats of sounds play on simulator, but not works on device.. eg: mp3

Change sound format and try.