puzzled about speech synthesis
puzzled about speech synthesis
- Subject: puzzled about speech synthesis
- From: Daniel Richman <email@hidden>
- Date: Thu, 22 Jan 2009 16:49:49 -0800
Hi all,
I am trying to write an app that has a hard-coded NSString, formatted
like this:
@"Alex: This is a test.\nBruce: One two.\nFred: This is another test."
The idea is that the lines in the text are spoken using the indicated
voice. In the example above, line one is Alex, line two is Bruce, and
line three is Fred.
I'm puzzled, however, because what ends up happening is that only the
last line ("This is another test") is spoken. Furthermore, the voice
used is the first one in the list (Alex). I've tested this with multiple
last lines and voices.
So, I set breakpoints in my code:
(IBAction)speakPlay:(id)sender
{
NSLog(@"Starting to speak play");
[isSpeakingField setStringValue:@"Speaking"];
for (NSString *line in separatedPlay) {
// set the speaker for this line
NSUInteger locationOfFirstColonInLine = [line
rangeOfString:@":"].location;
NSString *characterForLine = [line
substringToIndex:locationOfFirstColonInLine];
[speechSynthesizer setVoice:
[NSString
stringWithFormat:@"com.apple.speech.synthesis.voice.%@", characterForLine]];
NSString *partOfLineToSpeak = [line
substringFromIndex:(locationOfFirstColonInLine + 2)];
// speak the part of the line after the character
[speechSynthesizer startSpeakingString:partOfLineToSpeak];
}
}
When I use the debugger:
- The voice (Alex, in this case) is correctly recognized from the text.
- The speech synthesizer is set to the correct voice.
- "partOfLineToSpeak" is set correctly (to "This is a test.")
- When I get to the "start speaking" command, I get two long (wrapped to
several lines each) lines of blather about what I think is the audio
driver, but no voice. (Although I tested this on another app I wrote to
synthesize a line the user types in, and the same thing happens:
blather, but no voice when using gdb.)
So I'm stumped. Why is the wrong line spoken (w/o the debugger), but,
with the debugger, the correct line is used?
Thanks,
Daniel
P.S. my init code is below in case you want to refer to that.
- (id)init {
[super init];
play = @"Alex: This is a test.\nBruce: One two.\nFred: This is
another test.";
separatedPlay = (NSMutableArray *) [play
componentsSeparatedByString:@"\n"];
speechSynthesizer = [[NSSpeechSynthesizer alloc] initWithVoice:nil];
[speechSynthesizer setDelegate:self];
return self;
}
-
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