Single precision gammatone filterbank - help needed :( (Piotr Holonowicz )


Subject: Single precision gammatone filterbank - help needed :(
From:    Piotr Holonowicz  <piotr.holonowicz@xxxxxxxx>
Date:    Wed, 20 Jul 2011 12:42:26 +0200
List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>

Dear Colleagues, I am currently working on analysing music using Gammatone filters instead of the FFT. Due to the fairly large number of the concurrent filters I needed to implement it using Graphics Processing Units (Nvidia CUDA), but my implementation uses double precision numbers, which are only available with decent and powerful, thus expensive graphic cards. I would like then to change the implementation to a single precision, however, it returns garbage if the center frequency is below 200 Hz. Has someone an implementation of the Gammatone / Gammachirp filter bank that does not require double precision? I am more interested in how it works than just the code as I need to rewrite it to make it working on GPU. For any suggestions/ help I'll be very grateful. Best Piotr Holonowicz Music Technology Group Universitat Pompeu Fabra, Barcelona Spain


This message came from the mail archive
/var/www/postings/2011/
maintained by:
DAn Ellis <dpwe@ee.columbia.edu>
Electrical Engineering Dept., Columbia University