IPB

Welcome Guest ( Log In | Register )

DSP Loudness Control, What is Best Filter architecture
easily_confused
post Jan 10 2012, 05:39
Post #1





Group: Members
Posts: 5
Joined: 5-September 09
Member No.: 72908



I want to implement bass boost based on volume setting. Basically the low end (below 2KHz) of the Fletcher Munson curves. I don't want to try to dynamically load interpolated biquad filter coefficients based on the volume control. Is ther some other filter architecture that will produce the approx. 0db per octave (loud) to 12 dB per octave (low volume) bass boost in a simpler way. An example of a simple 6dB only analog control is at extron.com http://www.extron.com/company/article.aspx...p;version=print . This would be simple to implement as an iir filter, but I want to go a little fancier. Thanks
Go to the top of the page
+Quote Post

Posts in this topic
- easily_confused   DSP Loudness Control   Jan 10 2012, 05:39
- - pdq   How about taking the unfiltered data, and the data...   Jan 10 2012, 13:46
- - Woodinville   You need a time-varying system with knowlege of th...   Jan 10 2012, 14:13
- - DVDdoug   I think what you are looking for is a shelving fil...   Jan 10 2012, 20:34
- - easily_confused   Hmmm, - implementing the exton example is not as s...   Jan 10 2012, 21:43
|- - bandpass   SoX has an accurate FFT FIR filter implementation ...   Jan 15 2012, 10:48
- - Woodinville   Again, you need a signal-dependent EQ that operate...   Jan 16 2012, 01:05
|- - hellokeith   QUOTE (Woodinville @ Jan 15 2012, 19:05) ...   Jan 16 2012, 05:20
|- - Woodinville   QUOTE (hellokeith @ Jan 15 2012, 20:20) Q...   Jan 16 2012, 06:24
|- - splice   QUOTE (Woodinville @ Jan 15 2012, 21:24) ...   Mar 18 2012, 12:00
- - saratoga   I always wondered if they're any good open sou...   Jan 16 2012, 05:39
- - dc2bluelight   First, the Fletcher-Munson data is not accurate. ...   Mar 30 2012, 09:40
|- - splice   QUOTE (dc2bluelight @ Mar 30 2012, 00:40)...   Mar 30 2012, 12:12
|- - Woodinville   QUOTE (dc2bluelight @ Mar 30 2012, 01:40)...   Mar 30 2012, 21:05
|- - splice   QUOTE (Woodinville @ Mar 30 2012, 12:05) ...   Mar 31 2012, 01:42
|- - Woodinville   QUOTE (splice @ Mar 30 2012, 17:42) I...   Mar 31 2012, 03:40
|- - splice   QUOTE (Woodinville @ Mar 30 2012, 18:40) ...   Mar 31 2012, 11:05
- - dc2bluelight   Perhaps my statement as to Fletcher-Munson getting...   Mar 31 2012, 03:13
|- - Woodinville   QUOTE (dc2bluelight @ Mar 30 2012, 19:13)...   Mar 31 2012, 03:44
||- - dc2bluelight   QUOTE (Woodinville @ Mar 30 2012, 21:44) ...   Mar 31 2012, 06:20
||- - Woodinville   QUOTE (dc2bluelight @ Mar 30 2012, 22:20)...   Mar 31 2012, 09:25
|- - splice   (Excuse my trimming of quotes, I'm trying to k...   Mar 31 2012, 07:56
|- - Woodinville   QUOTE (splice @ Mar 30 2012, 23:56) An al...   Mar 31 2012, 09:27
||- - splice   QUOTE (Woodinville @ Mar 31 2012, 00:27) ...   Mar 31 2012, 13:03
|- - dc2bluelight   QUOTE (splice @ Mar 31 2012, 01:56) I rem...   Mar 31 2012, 10:01
|- - splice   QUOTE (dc2bluelight @ Mar 31 2012, 01:01)...   Mar 31 2012, 11:36
|- - dc2bluelight   QUOTE (splice @ Mar 31 2012, 05:36) I...   Mar 31 2012, 17:19
|- - splice   QUOTE (dc2bluelight @ Mar 31 2012, 09:19)...   Apr 1 2012, 11:41
|- - dc2bluelight   QUOTE (splice @ Apr 1 2012, 05:41) QUOTE ...   Apr 1 2012, 17:03
|- - splice   QUOTE (dc2bluelight @ Apr 1 2012, 09:03) ...   Apr 1 2012, 22:04
|- - dc2bluelight   QUOTE (splice @ Apr 1 2012, 16:04) This h...   Apr 1 2012, 22:37
|- - splice   QUOTE (dc2bluelight @ Apr 1 2012, 14:37) ...   Apr 2 2012, 01:49
|- - dc2bluelight   Oversimplified. Your example assumes that all s...   Apr 2 2012, 04:38
|- - splice   QUOTE (dc2bluelight @ Apr 1 2012, 20:38) ...   Apr 2 2012, 06:23
|- - dc2bluelight   I'd iterate, one last time, three points: 1....   Apr 2 2012, 16:14
|- - splice   QUOTE (dc2bluelight @ Apr 2 2012, 08:14) ...   Apr 2 2012, 21:37
|- - mbkennel   I don't know if I can solve the problem in its...   Jun 3 2013, 00:07
- - dc2bluelight   You can buy the paper from the AES, if I get time ...   Mar 31 2012, 17:38


Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 



RSS Lo-Fi Version Time is now: 20th April 2014 - 04:12