Thanks for the hint on the using the SemaphoreSlim. This works much better than the original extension I was using.

Thanks for the link. The error was in fact in the Ulaw to Alaw Encoding, The output audio now sounds identical although the samples are different. I will have to look into this I assume it could be do to endianness.

It's not pretty in the bowels of the engine room. I refuse to play the game that our code is perfect. My code looks the same as what I look like on waking in the morning. It's a bit rough and needs a shave. cheers Chris Maunder

That's up to you, but I doubt they sell your particular medication. :) Regards, Rob Philpott.

Yes, Using Settings in C#[^], Oh, and try not to save passwords in plain form, encrypt them first. I have no smart signature yet...