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Input and output filtering

 
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Mcfly



Joined: 08 Mar 2013
Posts: 46
Location: Argentina

PostPosted: Wed Apr 13, 2016 11:47 am    Post subject: Input and output filtering Reply with quote

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/uploads/2011/10/eTAP2hw_1_5b.jpg

Thanks!
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frank



Joined: 19 Oct 2005
Posts: 972

PostPosted: Thu Apr 14, 2016 7:01 am    Post subject: Reply with quote

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



Joined: 08 Mar 2013
Posts: 46
Location: Argentina

PostPosted: Thu Apr 14, 2016 12:19 pm    Post subject: Reply with quote

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?
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frank



Joined: 19 Oct 2005
Posts: 972

PostPosted: Sat Apr 16, 2016 8:53 am    Post subject: Reply with quote

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



Joined: 20 Nov 2009
Posts: 17
Location: Netherlands

PostPosted: Thu Apr 21, 2016 7:55 am    Post subject: Re: Input and output filtering Reply with quote

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/uploads/2011/10/eTAP2hw_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
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