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[Csnd] brick wall limiter

Date2012-01-13 19:41
FromThomas Hass
Subject[Csnd] brick wall limiter
Hello Csounders,

Does anyone have any examples of a good brick wall limiter.  I've been experimenting with the dam opcode, but I can't get the signal to fall fast enough.  Is seems like commercial limiters have a near instant "fall time".  Am I missing some trick to accomplish this?

Thanks
Thomas

Date2012-01-13 19:43
FromVictor
SubjectRe: [Csnd] brick wall limiter
Clip opcode ?


Sent from my iPad

On 13 Jan 2012, at 19:41, Thomas Hass  wrote:

> Hello Csounders,
> 
> Does anyone have any examples of a good brick wall limiter.  I've been experimenting with the dam opcode, but I can't get the signal to fall fast enough.  Is seems like commercial limiters have a near instant "fall time".  Am I missing some trick to accomplish this?
> 
> Thanks
> Thomas


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Date2012-01-13 19:51
FromKelly Hirai
SubjectRe: [Csnd] brick wall limiter
i've always wanted to try non-linear transfer functions like
2*atan(x)/3.1415927 for 0dbs=1.0

k.

On 01/13/12 14:43, Victor wrote:
> Clip opcode ?
>
>
> Sent from my iPad
>
> On 13 Jan 2012, at 19:41, Thomas Hass  wrote:
>
>> Hello Csounders,
>>
>> Does anyone have any examples of a good brick wall limiter.  I've been experimenting with the dam opcode, but I can't get the signal to fall fast enough.  Is seems like commercial limiters have a near instant "fall time".  Am I missing some trick to accomplish this?
>>
>> Thanks
>> Thomas
>
> Send bugs reports to the Sourceforge bug tracker
>             https://sourceforge.net/tracker/?group_id=81968&atid=564599
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"
>



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Date2012-01-14 03:45
Frommark jamerson
SubjectRe: [Csnd] brick wall limiter
I'm not an expert, but I believe the commercial limiters use some sort of "look-ahead" to calculate what needs to happen in terms of attack and release. 


From: Thomas Hass <thass@berklee.edu>
To: csound@lists.bath.ac.uk
Sent: Friday, January 13, 2012 1:41 PM
Subject: [Csnd] brick wall limiter

Hello Csounders,

Does anyone have any examples of a good brick wall limiter.  I've been experimenting with the dam opcode, but I can't get the signal to fall fast enough.  Is seems like commercial limiters have a near instant "fall time".  Am I missing some trick to accomplish this?

Thanks
Thomas



Date2012-01-14 04:32
FromSteven Yi
SubjectRe: [Csnd] brick wall limiter
Hi Thomas,

I don't use limiters very much, but I remembered these filters by Eric Spjut:

http://www.csounds.com/spjut/index.html

Also, have you tried compress:

http://www.csounds.com/manual/html/compress.html

steven

On Fri, Jan 13, 2012 at 2:41 PM, Thomas Hass  wrote:
> Hello Csounders,
>
> Does anyone have any examples of a good brick wall limiter.  I've been
> experimenting with the dam opcode, but I can't get the signal to fall fast
> enough.  Is seems like commercial limiters have a near instant "fall time".
>  Am I missing some trick to accomplish this?
>
> Thanks
> Thomas


Send bugs reports to the Sourceforge bug tracker
            https://sourceforge.net/tracker/?group_id=81968&atid=564599
Discussions of bugs and features can be posted here
To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"


Date2012-01-14 05:43
FromThomas Hass
SubjectRe: [Csnd] brick wall limiter
Yes, I've been experimenting with compress quite a lot.  I've gotten decent results with dam used in combination with the transfer function that Kelly described.  However, the best I can manage so far is to ease the clipping until dam brings the signal down to a suitable level.  I'll keep experiment with dam and compress and report back if I get any better results.

Thanks for all the pointers!
Thomas

On Fri, Jan 13, 2012 at 11:32 PM, Steven Yi <stevenyi@gmail.com> wrote:
Hi Thomas,

I don't use limiters very much, but I remembered these filters by Eric Spjut:

http://www.csounds.com/spjut/index.html

Also, have you tried compress:

http://www.csounds.com/manual/html/compress.html

steven

On Fri, Jan 13, 2012 at 2:41 PM, Thomas Hass <thass@berklee.edu> wrote:
> Hello Csounders,
>
> Does anyone have any examples of a good brick wall limiter.  I've been
> experimenting with the dam opcode, but I can't get the signal to fall fast
> enough.  Is seems like commercial limiters have a near instant "fall time".
>  Am I missing some trick to accomplish this?
>
> Thanks
> Thomas


Send bugs reports to the Sourceforge bug tracker
           https://sourceforge.net/tracker/?group_id=81968&atid=564599
Discussions of bugs and features can be posted here
To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"



Date2015-05-25 14:11
Fromvallste
SubjectRe: brick wall limiter
Can someone explain the numbers in this formula?
I've found it quite useful but I'd like to know why use these specific
numbers.

Thank you in advance


kghongaku wrote
> i've always wanted to try non-linear transfer functions like
> 2*atan(x)/3.1415927 for 0dbs=1.0
> 
> k.





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Date2015-05-25 14:28
Frommskala@ansuz.sooke.bc.ca
SubjectRe: brick wall limiter
On Mon, 25 May 2015, vallste wrote:
> Can someone explain the numbers in this formula?
> I've found it quite useful but I'd like to know why use these specific
> numbers.

Arctangent is a trigonometric function that by its nature produces an
angle in the range -pi/2 to +pi/2, where pi is the ratio between
circumference and diameter of a circle.  Dividing by pi and multiplying by
two gives a result in the range -1 to 1, which is convenient.  The number
3.1415927 is a reasonable approximation of pi, whose true value is an
irrational number.