Hi, What regional language are you using when the Comb filter doesn't work? Thanks, Alex H. ----- Original Message ----- From: Anders Holmberg To: audacity4blind@xxxxxxxxxxxxx Sent: Tuesday, December 12, 2006 9:16 AM Subject: [audacity4blind] COmb filter not working. Hello! I have som problems with a nyquist plugin called comb filter. WHen i try to apply it to an audio file it says: Nyquist did not return audio. THis is really strange. However when i go into the windows xp controlpanel and then change tha national settings and use the english us settings and applys the comb filter evrything is ok. Can somebody explain this to me? /Anders.