[LAD] Good Mixer Library

Gerald Mwangi gerald.mwangi at gmx.de
Sat Mar 26 18:11:45 UTC 2011

Oh thanks, I'll look at the links.
On Sat, 2011-03-26 at 12:43 -0500, Gabriel M. Beddingfield wrote:

> On Saturday, March 26, 2011 12:13:09 pm Gerald Mwangi wrote:
> > Hi, I'm messing arround with the source of TerminatorX.
> > As it seems, tX needs a total rewright of the mixer and
> > the audio backend. Since many programs (Ardour,
> > Qtracktor) have built mixers, I was wondering from which
> > project I could 'borrow' the mixer component. I need a
> > mixermodel which is strictly C++, which idealy has jack
> > support built in, possibly multithreaded,
> > GUI-Independant and easy to handle. I started to wright
> > my own mixermodel, but then I thought how stupid it is
> > to reinvent the wheel. It would really be nice something
> > like a libmixer with jack, lv2, ladspa and VST support.
> > Gerald
> I was looking for something like this, too... and then I 
> realized that I was trying to re-write JACK inside my 
> application space.  :-/
> Here are some options I found for low-level stuff:
>   - I started a BAMS library (Basic Audio Mixing
>     Subroutines) on my hard drive.  It's patterned
>     after Ardour's internal mixing subroutines.
>   - There's liboil and it's successor ORC.  Before
>     using liboil, you should check out the rationale
>     for why it's now being done with ORC.
>   - I saw another SIMD audio processing library
>     recently.  Looked a lot like liboil.
> For a higher-level mixing library... the more I thought 
> about it the more I was convinced that writing a general-
> purpose "mixer" library is more-or-less trying to re-write 
> JACK in my application space.  The options I found for this 
> are:
>   - Ingen is designed to be an audio engine, handling
>     all your plugins and connections and misc. DSP
>     routings.
>   - I started a Mixer class for libTritum (part of
>     Composite).  libTritium is intended ot be a public
>     API... but it's not there, yet.  However, this class
>     is pretty efficient and pretty general purpose.[1]
> Also, it's worth mentioning that many of the LAD's I talk to 
> think that mixing is low-level enough that such mixing 
> libraries are not a good idea.  That judicious ad-hoc mixing 
> here and there is the whole art of efficient DSP.
> [1] See these two (the interface and the implementation
>     headers):
>     http://gitorious.org/composite/composite/blobs/master/src/Tritium/Tritium/Mixer.hpp
>     http://gitorious.org/composite/composite/blobs/master/src/Tritium/Tritium/MixerImpl.hpp
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