Input and output filtering

Hardware questions and issues with the FV-1

Moderator: frank

Post Reply
Mcfly
Posts: 46
Joined: Fri Mar 08, 2013 1:38 pm
Location: Argentina

Input and output filtering

Post by Mcfly » Wed Apr 13, 2016 12:47 pm

Hi! I see on this schematic that the input and the output are filtered by two second order opamp filters. Is it necessary to use them on a guitar pedal design? Is SNR improved with this method?

http://www.echotapper.nl/wp/wp-content/ ... w_1_5b.jpg

Thanks!

frank
Posts: 991
Joined: Wed Oct 19, 2005 12:26 pm
Contact:

Post by frank » Thu Apr 14, 2016 8:01 am

You will need to ask Piet over at echoTapper, he made the filters as part of the overall emulation of tape based delay.
Frank Thomson
Experimental Noize

Mcfly
Posts: 46
Joined: Fri Mar 08, 2013 1:38 pm
Location: Argentina

Post by Mcfly » Thu Apr 14, 2016 1:19 pm

frank wrote:You will need to ask Piet over at echoTapper, he made the filters as part of the overall emulation of tape based delay.
Frank, besides the emulation effect, my question is: if i'm going to feed my effect with a guitar (Bw from 80hz to 10khz) is it a good practice to restrict the BW of the input and output buffers? Does this helps to reduce possible hiss noise from the fv1?

frank
Posts: 991
Joined: Wed Oct 19, 2005 12:26 pm
Contact:

Post by frank » Sat Apr 16, 2016 9:53 am

Too many variables such as layout, etc. All I can suggest is try it and see if you like it.
Frank Thomson
Experimental Noize

peterv
Posts: 17
Joined: Fri Nov 20, 2009 2:43 am
Location: Netherlands
Contact:

Re: Input and output filtering

Post by peterv » Thu Apr 21, 2016 8:55 am

Mcfly wrote:Hi! I see on this schematic that the input and the output are filtered by two second order opamp filters. Is it necessary to use them on a guitar pedal design? Is SNR improved with this method?

http://www.echotapper.nl/wp/wp-content/ ... w_1_5b.jpg

Thanks!
The way filtering was designed was to match the Meazzi machines. At the present,the latest filter design was optimized by Steve Mitchell. Obviously all with emphasis on vintage Meazzi curves.

Piet

Post Reply