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 DiscreetFX:  1 hr 58 mins ago News News : Rave version 1.5 released for AmigaOS4
   posted by Trixie on 16-Jan-2023 7:12:58 (586 reads)
An update to the Rave audio editor has been released on


- New function in the Process menu: "Reverse".
- New function in the Edit menu: "Paste at".
- New function in the Edit menu: "Insert Silence".
- A user-defined amount of silence can also be inserted when creating a new project.
- Updated documentation.


Just extract the program drawer to a suitable location on your disk, making sure that it has plenty of free space. Replace any previous installation of the program.


- AmigaOS 4.1 Final Edition Update 2 or newer.
- Enhancer Core classes (toolbar.gadget, infodata.gadget, select.gadget, shared.image).


- A modern, configurable graphical user interface (GUI).
- A tabbed environment for managing multiple projects from within a single program window.
- A powerful custom file requester with preview playback and other useful features.
- A wide selection of editing functions with unlimited Undo.
- Asynchronous operation: performing a task in a project doesn't block the other projects.
- Support for multiple clipboard units.
- Modular design with an object-oriented plugin system, which makes the program easy to extend.
- A wide range of supported audio file types and formats.

See the included documentation (or its online version) for more information.

(c) 20222023 Rear Window Software

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Re: Rave version 1.5 released for AmigaOS4
Posted on 17-Jan-2023 9:03:07
#1 ]
Elite Member
Joined: 6-May-2007
Posts: 10926
From: Greensborough, Australia

Thanks for the update. Hasn't been long since I last downloaded this and it keeps rolling on. Given a focus is on sound editing I do wonder about something. In the 90's sample editing was tedious when you needed to zoom in and find that sweet spot for marking, usually sound or silence. What I wonder is if you have any plans to alleviate this? Such as with a transient or sound detector? I've become used to the convenience of software that allows moving from transient to another. And it would be useful in an editor.

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Re: Rave version 1.5 released for AmigaOS4
Posted on 17-Jan-2023 11:40:02
#2 ]
Amiga Developer Team
Joined: 1-Sep-2003
Posts: 2078
From: Czech Republic


Thanks for trying out the program! I don't have any peak/transient detector code of my own but if there's something in the public domain, I'd love to be pointed to it.

The Rear Window blog

AmigaOne X5000/020 @ 2GHz / 4GB RAM / Radeon RX 560 / ESI Juli@ / AmigaOS 4.1 Final Edition
SAM440ep-flex @ 667MHz / 1GB RAM / Radeon 9250 / AmigaOS 4.1 Final Edition

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Re: Rave version 1.5 released for AmigaOS4
Posted on 28-Jan-2023 1:35:05
#3 ]
Elite Member
Joined: 7-Mar-2003
Posts: 2010
From: Canada

Thanks Trixie.

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Re: Rave version 1.5 released for AmigaOS4
Posted on 29-Jan-2023 13:52:17
#4 ]
Elite Member
Joined: 6-May-2007
Posts: 10926
From: Greensborough, Australia


Sorry, I've tried to find this myself but all I find are complicated papers on advanced FFT techniques, when I know it is a lot simpler. The most basic technique would seek zero or seek sound. However if there is noise as would be expected this isn't practical and would be too simplistic. Next to that would be specifying a threshold or amplitude to work in and finding sounds that meet that criteria.

There's some simple code by one Michael Gruhn for finding transients. The only thing I haven't found what basic algorithm he uses or even example code. But I do know of FX code that uses it. So I'll just paste here I think. It's in a language called EEL which is like C. So in the following the @init sets it up. The @slider code specifies user changes from GUI. The @sample code would run for a block of samples. If I've understood it correctly the gain it calculates would detect a transient if over 0. The spl0 and spl1 represent stereo samples at that point in time in float averaging -1 to +1.

The general idea is to run two envelope followers at different speeds. One is slower than the other. Then when the slow one catches up and a difference is found that represents a transient.

desc:Transhape (for Drums)

slider1:0Attack (%)
slider2:0Sustain (%)

b1Env1 = -exp(-10 / srate );
a0Env1 = 1.0 + b1Env1;
b1Env2 = -exp(-62 / srate );
a0Env2 = 1.0 + b1Env2;


maxSpls = max(abs(spl0),abs(spl1));
env1 = (tmpEnv1 = a0Env1*maxSpls - b1Env1*tmpEnv1);
env2 = (tmpEnv2 = a0Env2*maxSpls - b1Env2*tmpEnv2);
gain = env2 - env1;
(gain > 0) ? gain = exp( log(1+(env2/env1))*attack ) : gain = exp( log(1+(env1/env2))*sustain ) ;
spl0 *= gain;
spl1 *= gain;

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