On Wed, Aug 25, 2010 at 11:40:09PM -0300, Israel Lopes dos Santos wrote: You can use IRs sampled at 44.1 or 48 kHz with either rate, if it doesn't match the reverb will just be around 8% longer or shorter. Resampling can be done using sox, sndfile-resample, or the resample application that comes with libzita-resampler. A more important thing with most IRs you'll find on the net is to remove the direct sound if it is included in the IR. Either replace it by a 'dirac' pulse (if you use the reverb as an insert and it should provide both dry sound and reverb), or just remove it (if you only want the reverb, to be mixed with the dry sound in your mixer). You don't have to edit the IR file, just use the 'offset' parameter in jconvolver's config file to skip the first N samples. Ciao, -- FA There are three of them, and Alleline.