Re: [FFADO-devel] Matrix mixer updates and another project in the subversion?

[Pieter P. <pi...@jo...>]

Arnold Krille wrote:
> Hi all,
> 
> I had high plans for the matrix-mixer as exported by ffado-dbus-server for 
> devices that have a matrix-mixer: Coupling both input and output channels and 
> pan n channels to m channels. So you can move a source two-dimensional in your 
> 4.0 or 5.0 array.
> 
> But I figured that this is a bit to ambitious for ffado-mixer. I think most 
> people with a device featuring a matrix-mixer want rather static setups and 
> the whole mixing matrix should fit into one screen.
> So ffado-mixers matrix mixer is going back to simple controls for each 
> junction. They look like colored labels showing the value but when you drag 
> them (up and down!) they are sliders. In the near future they will also get a 
> context-menu allowing to set values by entering numbers and to choose from 
> predefined values.

Sounds good.

> One question arises though: Currently the values are set in the scale the 
> dice-chips expects them (0 - (2^16-1) as integers), wouldn't it be better if 
> the dbus-interface (currently only of the matrix-mixer) uses dB?

The choice is where we want to do the translation between log and lin 
space. Personally I prefer to have this in ffado-mixer and not in 
libffado as I find it weird to expose an API that has to be controlled 
using log space values. But that's just a preference.

> 
> As I haven't burried the dreams about n-to-m panning I do have a second 
> question, specially to ppalmers as the server admin:
> I would like to refactor my old JackMix to a new, more generic Jack Matrix 
> Mixer (short JaMaMia) featuring different cores exporting their interface via 
> dbus and a gui written in python. The communication would be with the matrix 
> mixer interface already in ffado.
> I would like to develop this one in /trunk/jamamia on ffado's subversion 
> server. Is this okay? If I did the development on sf.net or something else, it 
> would be harder to keep the dbus-interfaces in sync...

I don't mind. We can always delete it afterwards if it sucks ;)

Greets,

Pieter