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Trasients when playing silence with Matlab

Dear friends,

Here is a technical question on a problem that is driving us crazy.

We want to play sounds from Matlab through an RME Fireface 400 sound card. The problem is that when we play a "silence" interval (array of zeros) we can hear (and even record) a clear transient at the onset of the _silence_ signal. We would very much like to get rid of that onset transient. Any cues as to how to get rid of it?

Thank you so much in advance.

- Enrique

Enrique A. Lopez-Poveda, Ph.D.
Instituto de Neurociencias de Castilla y León
Universidad de Salamanca
Av. Alfonso X El Sabio S/N, 37007 Salamanca, Spain.
Phone: (+34) 923 294 500 ext. 1957
Fax: (+34) 923 294 750
E-mail: ealopezpoveda@xxxxxxx