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    <p>While I don't see anything glaring that is causing the TTS issue, there are some best practices and code simplifications you could be using.</p> <p>First off, the class which includes Main(), SampleTTS doesn't need to be instantiated in order to call ConvertStringToSpeechWav():</p> <pre><code>class SampleTTS { static void Main(string[] args) { SampleTTS processor = null; try { processor = new SampleTTS(); </code></pre> <p>The Sample TTS class can be rewritten as follows:</p> <pre><code>class SampleTTS { static void Main(string[] args) { try { // get unprocessed items List&lt;String&gt; unProcessedItems = new List&lt;String&gt;(); unProcessedItems.Add("Kate"); unProcessedItems.Add("Sam"); unProcessedItems.Add("Paul"); unProcessedItems.Add("Violeta"); foreach (string record in unProcessedItems) { // convert text to wav ConvertStringToSpeechWav(record, "c:/temp/" + record + ".wav", Vendor.VOICEWARE, Gender.MALE, Languages.ENGLISH); } } catch (Exception e) { Console.WriteLine(e.Message); } } </code></pre> <p>Note I also changed the list from <code>ArrayList -&gt; List&lt;String&gt;</code> as a best practice because List(T) performs better than ArrayList and is type safe. I also removed the <code>if (unProcessedItems != null check)</code> as you're already instantiating the list above, so it will either be non null or throw an exception.</p> <p>Lastly you're creating a new voice object each time <code>ConvertStringToSpeechWav()</code> is called:</p> <pre><code>voice = new SpVoice(); </code></pre> <p>and letting GC clean it up. Have you tried calling GC.Collect() like PauloPinto suggested above, just to see if it works? You don't have to stick to rigid coding principles just to get something working. The goal should always be to code cleanly and with principles, but more so to get your code in a working state, and then refactoring as needed.</p> <p>I hope some of this helps.</p> <p>Cheers.</p>
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    1. POUnable to create MULTIPLE TTS "wav" files using MS-SAPI 5.1 in C#
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    1. USDaniel R.
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    1. COThanks for the comments. I use java so i'm not too sure about calling non static methods from static main. And I agree with you that `ArrayList -> List<String>` is better because it is type safe. I had put that null check in place because ideally the data would be coming from DB but I had to adapt the code for posting. I have not tried GC.Collect(). I will give it a shot when I get the chance. But seeing that you mentioned I'm creating a SpVoice() object for each call, I've started to think may be I should just create an object once and re-use that object to create all the files?
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    2. COGC.Collect() worked for me. I know it isn't ideal but my solution is now working. Thanks.
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