[geofftowell]

Overnight I got to thinking and read through the documentation several more times. With some more experimentation, I got recognition with grammars working in the sample code by modifying the viewDidLoad and startListening methods as shown below. (I removed a bunch of comments to make things shorter.)

The central thing I had missed was changing languageModelIsJSGF to TRUE in the startListeningWithLanguageModelAtPath method

Thanks for your help.

– (void) startListening {

self.pocketsphinxController.returnNullHypotheses=YES;
self.pocketsphinxController.verbosePocketSphinx=YES;
[self.pocketsphinxController startListeningWithLanguageModelAtPath:self.pathToFirstDynamicallyGeneratedLanguageModel dictionaryAtPath:self.pathToFirstDynamicallyGeneratedDictionary acousticModelAtPath:[AcousticModel pathToModel:@”AcousticModelEnglish”] languageModelIsJSGF:TRUE]; // Change “AcousticModelEnglish” to “AcousticModelSpanish” in order to perform Spanish recognition instead of English.
self.pocketsphinxController.verbosePocketSphinx=YES;

}

– (void)viewDidLoad {
[super viewDidLoad];
[OpenEarsLogging startOpenEarsLogging];
self.restartAttemptsDueToPermissionRequests = 0;
self.startupFailedDueToLackOfPermissions = FALSE;

[self.openEarsEventsObserver setDelegate:self];
LanguageModelGenerator *languageModelGenerator = [[LanguageModelGenerator alloc] init];
NSDictionary *dd = @{
ThisWillBeSaidOnce : @[
@{ OneOfTheseCanBeSaidOnce : @[@”HELLO COMPUTER”, @”GREETINGS ROBOT”]},
@{ OneOfTheseWillBeSaidOnce : @[@”GO”, @”MOVE”]},
@{ OneOfTheseWillBeSaidOnce : @[@”EXECUTE”, @”DO IT”]},
]
};
NSError *error2 = [languageModelGenerator generateGrammarFromDictionary:dd withFilesNamed:@”FirstOpenEarsDynamicLanguageModelG” forAcousticModelAtPath:[AcousticModel pathToModel:@”AcousticModelEnglish”]];

NSDictionary *firstDynamicLanguageGenerationResultsDictionary = nil;
if([error2 code] != noErr) {
NSLog(@”Dynamic language generator reported error %@”, [error2 description]);
} else {
firstDynamicLanguageGenerationResultsDictionary = [error2 userInfo];

NSString *lmFile = [firstDynamicLanguageGenerationResultsDictionary objectForKey:@”LMFile”];
NSString *dictionaryFile = [firstDynamicLanguageGenerationResultsDictionary objectForKey:@”DictionaryFile”];
NSString *lmPath = [firstDynamicLanguageGenerationResultsDictionary objectForKey:@”LMPath”];
NSString *dictionaryPath = [firstDynamicLanguageGenerationResultsDictionary objectForKey:@”DictionaryPath”];

NSLog(@”Dynamic language generator completed successfully, you can find your new files %@\n and \n%@\n at the paths \n%@ \nand \n%@”, lmFile,dictionaryFile,lmPath,dictionaryPath);

self.pathToFirstDynamicallyGeneratedLanguageModel = lmPath;
self.pathToFirstDynamicallyGeneratedDictionary = dictionaryPath;
}

self.usingStartLanguageModel = TRUE;
[self startListening];
[self startDisplayingLevels];
self.startButton.hidden = TRUE;
self.stopButton.hidden = TRUE;
self.suspendListeningButton.hidden = TRUE;
self.resumeListeningButton.hidden = TRUE;
}

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