1 (edited by SoundLight 2019-11-14 18:31:32)

Topic: Can you help me understand why does the HPF change the +\-DC-OffSet ?

Hi there, Great Day to everyone


Can you help me understand why/how does the HPF change the +\-DC-OffSet ( to “ 0 “ ) ?


Before HPF:

https://lh3.googleusercontent.com/TzcbaRzF7MUipQh__FEvux4eBXlJEcU4Dj3rCYAucDSvJ54B-G-4Q_bN3tMmSI4QWWdeKSzdJJiEiS-fizBvSR3f7QMXZrx_oPIulUCzc7_8c8Cs42113FQQ4XrxNvtnBAA71e7s8YXb8xN_BYJHJKg6Mvgz_ln0VjPA54ZOwynD70Z1YJQI7yvOkhoUDaDPPu1_1_5KgK2IYM4FKb37_EYjviSOC5z__S57rYOpSXwAfwBFMndPG8d36QSp5utpjtQmF-6zPYchjeSH_4bY7EuDfmp2WsIUZgPYcCEcMOY7DxalezgKA_xlOcCaBViF6alLJtfQ1kJkkr19704m-HlDTXmgeVl1VDq9M8Oaxdxuq66kiW0am10bsLbeeCeWYt_fMID_9EriOs0-ipiY9m4qtYO1O9C5yS5kZiTVJ2kJr4l2aWBiQdhm9zPt9F28zoFqWRopY3FU2emjH-dT5_EanEcVlrjLphbkKmMTXDRVwsRcQktHsK1i--BETBuu4b_yj3ebls46rlKQ9nB9OUgGB6PO-6-Bj_4Sse6uqSeWqs9dlFTUHwS7IFHQY5LbnOtzESp0SFRM7cRHdKlEs-KD5duADacK5eIFxoEI-RVoJeazG01codu8I4_aVXN2W3H8wVNIvMbOdGB7iU_lueQgRx9_P-AzbBZLAEH5OyvTV0mHzfOQtTQ=w1014-h215-no


After HPF:

https://lh3.googleusercontent.com/FIkRcn6hZF0tn6kmkCW4kY9jBD_yCuKlwmGwJDDzKQx_aVe7cQRHbh-JHtafmk2YGZ6GDNf6OfLYTH9xY-aKGMxC2bxCz5ous9sI_X8lawWRAw-UteI4MGvvuWdGgnDZg-ddEzbYQRI6N4-inSXq-KG7K_TpIbtoV2tr_ziyDSLfmTOS5LndZMWoJYyBBAKQBrmjL_AlpnMRsYu0zYq8Sd-X8GzDIJX-Ph2_0asqWlZaVybr8EN_iCMf8EC_NEJfglclcQ4qZyi8P3_ZCpPfH_MxHjS8z8800D9_N28p4nYA4mJuxEh-BhMQtCOF94NdQVyoS_sy6F12yl1pbGCZH7sSUcrUIPoBs6aTfq210L4EMFM87EVkzjfodix5cSdL9xnCHlmqHR4LKt9mWumQbtg09T0TI5sydytdvYEzTOhR6YJeDrGZW6Klhip3yexZ_u0ogXc56iJCgsYj9Tu7tm31ti6fB9IbLOSDOlfpI1Q47tftNbTQ_Ku02VNk6bnhbCK7JbHm-rDpZoIg0SpRODgLoUU2_xoMyPU-oZjW0gZl2DjVmIXkVHDGSGJDBffzOj3SBuKyxJUS3N6CpqHJFmmI8Dv0C-8r4kz5PfLCUA6bohFW3PmiKL7EvBARp16yZ1GHHzotW3wyvSu6ssusinMfgLDzRTPxfSM5174HxyXaBPh4romKzXk=w1014-h219-no


I am asking because i want to understand -and know- how the audio signal is processed and coded and why and how can HPF work the way it does with the DC

Re: Can you help me understand why does the HPF change the +\-DC-OffSet ?

If by HPF you mean high pass filter, it increasingly attenuates signal components as their frequency decreases. Typically, DC which corresponds to 0 Hz is entirely removed, i.e. attenuated infinitely.

3 (edited by ramses 2019-11-15 16:32:34)

Re: Can you help me understand why does the HPF change the +\-DC-OffSet ?

@SoundLight: on windows with firefox: the URLs that you provided do not work.
Neither clickable, also copy and past doesnt work, as the URL / the text can not be selected by the mouse cursor.

Could you kindly edit your posting and provide the URL tags around the URL ?

[url]https://........[/url]
BR
Ramses
X10SRi-F, Win10 Pro 1909, Cubase, UFX+, Octamic XTC, ADI-2 Pro FS BE/R BE, RayDAT, ARC USB

4 (edited by jiw 2019-11-15 16:39:00)

Re: Can you help me understand why does the HPF change the +\-DC-OffSet ?

ramses wrote:

@SoundLight: on windows with firefox: the URLs that you provided do not work.
Neither clickable, also copy and past doesnt work, as the URL / the text can not be selected by the mouse cursor.

Could you kindly edit your posting and provide the URL tags around the URL ?

[url]https://........[/url]

Quote the post and the code becomes visible. It's in the picture environment but the links are dead/lead to locked content.

Anyways, in the quoted post, I have changed the picture environment to links (URLs) below.

SoundLight wrote:

Hi there, Great Day to everyone


Can you help me understand why/how does the HPF change the +\-DC-OffSet ( to “ 0 “ ) ?


Before HPF:

https://lh3.googleusercontent.com/Tzcba … 14-h215-no


After HPF:

https://lh3.googleusercontent.com/FIkRc … 14-h219-no


I am asking because i want to understand -and know- how the audio signal is processed and coded and why and how can HPF work the way it does with the DC

EDIT: Also right-click and "copy image address" works for me using Vivaldi on macOS.

Re: Can you help me understand why does the HPF change the +\-DC-OffSet ?

ramses wrote:

@SoundLight: on windows with firefox: the URLs that you provided do not work.
Neither clickable, also copy and past doesnt work, as the URL / the text can not be selected by the mouse cursor.

Could you kindly edit your posting and provide the URL tags around the URL ?

[url]https://........[/url]

does it work now?

( for whatever reason ) i had to reload the page for the images to show

Re: Can you help me understand why does the HPF change the +\-DC-OffSet ?

jiw wrote:
ramses wrote:

@SoundLight: on windows with firefox: the URLs that you provided do not work.
Neither clickable, also copy and past doesnt work, as the URL / the text can not be selected by the mouse cursor.

Could you kindly edit your posting and provide the URL tags around the URL ?

[url]https://........[/url]

Quote the post and the code becomes visible. It's in the picture environment but the links are dead/lead to locked content.

Anyways, in the quoted post, I have changed the picture environment to links (URLs) below.

SoundLight wrote:

Hi there, Great Day to everyone


Can you help me understand why/how does the HPF change the +\-DC-OffSet ( to “ 0 “ ) ?


Before HPF:

https://lh3.googleusercontent.com/Tzcba … 14-h215-no


After HPF:

https://lh3.googleusercontent.com/FIkRc … 14-h219-no


I am asking because i want to understand -and know- how the audio signal is processed and coded and why and how can HPF work the way it does with the DC

EDIT: Also right-click and "copy image address" works for me using Vivaldi on macOS.

thank you jiw, for some reason i was unable to get images to work straight from google images

7 (edited by SoundLight 2019-11-18 02:18:33)

Re: Can you help me understand why does the HPF change the +\-DC-OffSet ?

jiw wrote:

If by HPF you mean high pass filter, it increasingly attenuates signal components as their frequency decreases. Typically, DC which corresponds to 0 Hz is entirely removed, i.e. attenuated infinitely.

thank you, but what makes me Question, is: How does the HPF understand which part of the ( for example above sine wave ) Signal is DC and which is not, that it removes ?

I am talking about ( why does hpf remove ) DC offset, which is different from ( concept of ) DC