@Xenic

DBX and dolby are are doing something entirely different.

In didgital recording, and analog too for that matter, compression is used so as to make better use of the dynamic range available. At the recording stage it can be particularly useful with vocals for instance. The volume difference between a wisper and a shout is such that in a linear recording, ie with no compression, in order to fit the loud sections in the available space you would lose quality on the quiet sections. Compresion aleviated that.

Then in the mixing stage compresion is very useful to even peaks in drums etc.

The kind of compressor we are talking about here though is aimed largely at the final "mastering stage" when you take a mixed recording (or batch of mixed recording) and get the final sounds conistant across the whole album, and make the overall sound "louder". Most modern recording use extensive compression (and over tecniques) to ensure that the track listens well in a variety of environments, particularly on the radio. In fact most modern recording are over compressed, as the record companies battle to be the loudest and capture the modern days teenagers 2 second attention span.

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BroadBlues On Blues BroadBlues On Amiga Walker Broad

@Kicko

Downloaded that version and got a DSI as you describe.

I don't get this with my current install.


Downloaded version is 0.9z 2011

Installed version is also 0.9z but dated 11.11.2008

Last edited by broadblues on 05-Nov-2011 at 04:13 PM.

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BroadBlues On Blues BroadBlues On Amiga Walker Broad

@Wanderer

Just gave it a very quick look, not with any audio connected as my mixer is detached due to a gig night before, When I tried to open the GUI to see the visualisations, play back stalled reporting lack of CPU. I'm on a SAM Flex 733 Mhz. Perhaps the gaphics are not yet optimised, but if they are then an oprion to set the update rate might be useful, so as to reduce CPU requirements on slower machines. The is enough CPU to run the plugin, it's only the graphics thats struggling.

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BroadBlues On Blues BroadBlues On Amiga Walker Broad

@broadblues
HD-Rec will reduce the refresh rate autoamtically if CPU is at the limit. (actually, the HD-Rec GUI task runs at lower pri than the audio tast, so the OS is technically handling this for us).

You may benchmark the effect to see if the raw effect without visualisation is fast enough. Generally, it should be at lest 2x speed, otherwise there is not enough to maintain "the rest".
The mutli band compressor is not optimized in any way yet. I use everywhere floats, because I dont need to take care about value ranges. Plus, quality is the best.
Especially PPC has problems with FPU code, as I have seen in the past. It helps a lot to work with integers. Maybe this is doable in the future, but for now I am quite happy with the effect and it does ~50x speec on my WinUAE machine, thats a lot!

I will investigate what is the reason for this crash. Must be something small and stupid.
However please note: Its doing fine on WinUAE.

BTW, Dolby on audio tapes does something similar. it compresses the audio data and expands it on playback. But this is not what we want to do here.

The multi band compressor is good for voices, intruments, drums and for the final mix.
It brings much more "life" and transperency into the recordings, if not abused too much.

Last edited by Wanderer on 05-Nov-2011 at 05:37 PM.
Last edited by Wanderer on 05-Nov-2011 at 05:36 PM.

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Author of
HD-Rec, Sweeper, Samplemanager, ArTKanoid, Monkeyscript, Toadies, AsteroidsTR, TuiTED, PosTED, TKPlayer, AudioConverter, ScreenCam, PerlinFX, MapEdit, AB3 Includes and many more...
Homepage: http://www.hd-rec.de

@Wanderer

Are you using Enforcer when you're testing HDrec on your machine ?

Quote:

Downloaded version is 0.9z 2011 Installed version is also 0.9z but dated 11.11.2008

What's the difference of these versions ?

Last edited by Tomppeli on 05-Nov-2011 at 05:39 PM.

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Rock lobster bit me. My Workbench has always preferences. X1000 + AmigaOS4.1 FE
"Anyone can build a fast CPU. The trick is to build a fast system." -Seymour Cray

@Tomppeli

Sure, Enforcer is running all day on my machine. HD-Rec runns rock solid on my WinUAE, I have sometime sessions over several days.

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--
Author of
HD-Rec, Sweeper, Samplemanager, ArTKanoid, Monkeyscript, Toadies, AsteroidsTR, TuiTED, PosTED, TKPlayer, AudioConverter, ScreenCam, PerlinFX, MapEdit, AB3 Includes and many more...
Homepage: http://www.hd-rec.de

@Wanderer

Menus are always in nonblocking here as i dont like blocking. If you find anything and want me/us to try just hit us :)

@Wanderer

Here's my benchmark

HD-Rec Benchmark for DSP Effect "Ultra Band Compressor"
_____________________________________________________________________
4.9x Speed at 44.1kHz/stereo
20.0 % average CPU load
Total time per 1 sec audio:  200.6ms (202.0ms noise, 199.2ms tone)
Version: HD-Rec V0.9z Beta (11.11.2008)
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
Copy&Paste:
Ultra Band Compressor: 4.9x Speed (fx_ultraband.library)

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BroadBlues On Blues BroadBlues On Amiga Walker Broad

@broadblues

Well, its not a rocket, but 5x should be ok to use it in realtime. What if you close the GUI, does it keep up in realtime then?

It is coded in Amiblitz. But its quite easy to port it to C, since most of the stuff is just math, the GUI is done by the HD-Rec host and not part of the Effect, and the visual effects are just graphics.library.

I have a sceletton in C for a HD-Rec DSP Effect. Some have already been ported (3 Band Equalizer, Flanger, Reverb, Chorus), but there is noone who wants/can compile them for OS4.

So: Is there any OS4 developer out there who wants to compile some of the effects? In that case I would be willing to port the multiband to C too.

Last edited by Wanderer on 06-Nov-2011 at 09:59 AM.

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Author of
HD-Rec, Sweeper, Samplemanager, ArTKanoid, Monkeyscript, Toadies, AsteroidsTR, TuiTED, PosTED, TKPlayer, AudioConverter, ScreenCam, PerlinFX, MapEdit, AB3 Includes and many more...
Homepage: http://www.hd-rec.de

@Wanderer

I'll happily compile anything that's needs building for OS4, just point me at the source.

Having native builds of the more CPU intensive modules make a lot of sense.

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BroadBlues On Blues BroadBlues On Amiga Walker Broad

@Wanderer

Quote:

It is coded in Amiblitz. But its quite easy to port it to C, since most of the stuff is just math, the GUI is done by the HD-Rec host and not part of the Effect, and the visual effects are just graphics.library. I have a sceletton in C for a HD-Rec DSP Effect. Some have already been ported (3 Band Equalizer, Flanger, Reverb, Chorus), but there is noone who wants/can compile them for OS4.

I'd be interested to see the C-skeleton (and maybe the Reverb too, if possible?). I've been browsing trough the HD-Rec source on sourceforge but, unfortunately, my BlitzBasic knowledge is bit rusty at best. Some of the stuff makes sense but I'm totally lost at the assembler parts. Maybe that is just the side effects of using C/C++ most of the time...

Last edited by Pecosbil on 07-Nov-2011 at 09:50 AM.

@broadblues

Ah, I was about to ask if theres possibility to convert the effects to native code but good that someone is already taking this task. Having the cpu hungry stuff in native code is always a good thing :)

@Wanderer

Is there any way to zoom the notatiation vertically even more in the piano roll editor? I've clicked the magnifying glass on the right bottom corner but still sometimes "painting" the notes with mouse is difficult. Sometimes it creates note above the mouse pointer and not in the selected line.

Is it possible to control effect plugins with controllers? Lets say I want to create mod freq slide in Flanger from 0mHZ to 100mHz?

Btw, I also just created grim reaper by quickly clicking right menu twice :)

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OS4 on X5000 / Peg2 / mA1

@Kicko

Hmm... I decided to give it a go on MorphOS. But I cant find camd.library for MorphOS.

I have ported one but it is not in usable state ATM.

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Amiga Developer
Amiga 500, Efika, Mac Mini and PowerBook

@itix

Maybe bars&pipes MOS version has camd.library working ?

Follow me

@Wanderer

Any news on the crash on os4. Have you found anything ?

@Blues

Got any source yet. Just curious :)

@Thilo:

I've just seen this thread. Fantastic stuff that you're still working on this. I used your program a lot up until a few years ago when I switched to Logic on the Mac. Having said that, I'm hoping to have a bit more time on my hands to have a go at helping with some coding.

Regarding the compressor:

3 bands is probably enough. (I use a five band one occassionally but only because "it's there" - 3 is probably fine.)

As for the parameters, you seem to have that covered pretty well.

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Robert
--
A1XE G4, OS4.1. Peg1 G3, MOS 1.4.
Abel Soul - Check out our tunes on Spotify

@Kicko

Thanks! I got it running and everything seems work normal. I tried RMB but no problem there. Menus in MorphOS are non-blocking and I think option to use blocking menus was removed long ago (if it ever existed -- cant remember).

Btw very nice graphics there (I never ran this program before). Some alpha blending could make it pixel perfect, too ;)

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Amiga Developer
Amiga 500, Efika, Mac Mini and PowerBook

Tried also with latest os4.1 update 4. Still crash with RMB.

@Kicko

Got my X1000 with os4.1.5 and usb midi works there too :) So i can continue make music. However still crash with RMB in latest sourceforge version of hd-rec.

Last edited by Kicko on 05-Feb-2012 at 02:04 AM.

@Kicko

Glad your USB MIDI is still working.
I've been doing a lot of MIDI dev work, and I'm amazed at the power of this new machine.

Hopefully I'll have more news in the next few weeks.

LyleHaze

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@itix

Hmm.. I seem to remember talking to a dev who had devloped the camd.lib for morphos.. in a beta state.. i'll have to look into it. I'll check the camd.library on my old 1.4 install..