Re: [FFADO-devel] svn trunk ffado-mixer with Saffire Pro 40

[Aurelien <tyr...@fr...>]

On Tue, Sep 14, 2010 at 11:06:16PM +0200, Arnold Krille wrote :
> Hi,
> 
> On Tuesday 14 September 2010 13:28:54 tyr...@fr... wrote:
> > I just updated my FFADO installation from svn trunk (rev 1897), and got the
> > ffado-mixer working.
> > 
> > I'm not sure at all to use the good way, so don't hesitate to tell me, but
> > though I've found some things that shouldn't be, if I'm not wrong:
> > 
> > 1. first, ffado-mixer tells that: "Mixer has 16 rows and 18 columns", but
> > actually, the Focusrite Saffire Pro 40 has 18 inputs (if not counting the
> > two Loopback inputs) and 20 outputs, so I think this is wrong,
> 
> No, ffado-mixer is right:-)
> 
> Your device has 18 inputs and 20 outputs. But that is just the ports that go 
> in and out in real hardware. The device also has a mixing-unit with 18 inputs 
> and 16 outputs.

OK, right, I misunderstood that. So, yes, there 16 mixers with each 18
inputs, that's it?


> And it has a (matrix-)router to bring all these together. For the router, the 
> inputs in hardware and the outputs(!) of the mixer are sources which can be 
> router to any number of sinks, which consists of all the inputs of the mixer 
> and all the hardware outputs. 

Mmmmmh. OK, I think I understand, but not sure, though.

- 1st question: are the jack client corresponding to each hardware inputs
automatically routed to the hardware inputs? the same for the outputs?
I ask this question because on the mixer provided by Focusrite, you have
to tell that Analog In 1 goes to DAW 1 (for example).
- 2nd question: if not, is there a way to get them connected?

Actually, I get no sound when connecting firewire_pcm[gnagna]:capture_1
(which is a guitar) to firewire_pcm[gnagna]:playback_9/10 (which are 
the phones), though I can get signal on firewire_pcm[gnagna]:capture_1
when connecting it in Ardour (for example).



> Note that a source can be connected to many 
> sinks, but a sink can only receive the signal of one source, its a router, not 
> a mixer after all.

OK.

> 
> > 2. since I've used ffado-mixer, I get the 5th vu-meter lighting when
> > playing on the first analog input, the 6th when playing on he second, and
> > so on...
> 
> Seems something get mixed up. I get that two here on my pro24 but I don't know 
> where it comes from.

OK.

> 
> > I've tried this "Switch peak meter" option (which I don't know
> > what it's designed for
> 
> If you have input signals running and look at the router-tab (where the 
> "Switch peak meter" is located) you should see an effect immediately.

I don't have any vu-meter in my ffado-mixer, or I didn't found them!

> It 
> switches the vu-meters that each route has and shows its value in the 
> software. But as this results in a bit of cpu-load, its switchable and not 
> active by default

OK.

> 
> Maybe that helps,
> 
> Arnold



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-- 
Aurélien