Re: echo in the freq. domain (James Johnston )


Subject: Re: echo in the freq. domain
From:    James Johnston  <James.Johnston@xxxxxxxx>
Date:    Thu, 13 May 2010 11:32:53 -0700
List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>

Biggest headache in doing this kind of convolution in the frequency domain: Consider the N+M-1 overlap!!! -----Original Message----- From: AUDITORY - Research in Auditory Perception [mailto:AUDITORY@xxxxxxxx On Behalf Of Dan Stowell Sent: Wednesday, May 12, 2010 3:02 PM To: AUDITORY@xxxxxxxx Subject: Re: [AUDITORY] echo in the freq. domain Hi - You can do an echo (delay) effect in the frequency domain using convolution, exactly the same as you would for reverb - you would just use a different impulse response (a sparser one, typically, in the time domain). However, the sparsity means that you can typically implement it efficiently enough in the time domain, so there's not much point doing it frequency-domain. Why do you want to do it? Best Dan Danijel Domazet wrote: > Hi auditory, > I'd like to do a simple Echo effect in the frequency domain. Does anyone > remember any paper on the subject? There is a nice paper on freq domain > reverberation ("Frequency Domain Artificial Reverberation using Spectral > Magnitude Decay", Vickers E.), but couldn't find any on the echo.... > > Thanks, > > Danijel Domazet > CEO > LittleEndian.com -- Dan Stowell Centre for Digital Music Queen Mary, University of London Mile End Road, London E1 4NS http://www.elec.qmul.ac.uk/digitalmusic/people/dans.htm http://www.mcld.co.uk/ Notice: This message and any included attachments are intended only for the use of the addressee, and may contain information that is privileged or confidential. If you are not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please destroy the original message and any copies or printouts hereof.


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