Re: [FFADO-devel] [FFADO] #347: confused peak meters on Focusrite Saffire Pro 24 / 40

[Nils P. <ni...@ti...>]

On Wed, 2012-04-18 at 17:57 +0200, Philippe Carriere wrote:
> Le mercredi 18 avril 2012 à 10:59 +0200, Nils Philippsen a écrit : 
> > Hi Philippe,
> > 
> > On Sun, 2012-03-25 at 20:46 +0200, Philippe Carriere wrote:
> > 
> > > Important: it is intended that the device configuration has been first
> > > initialized (I mean one time) correctly (I mean reset under Windows or
> > > Mac OS, using the Focusrite soft). Then, ffado-mixer will do the work
> > > forever (most probably, until a new bug would appear ...:().
> > 
> > do you think it's feasible to add code to clean up mixer LED settings to
> > ffado-mixer? If you give me a pointer where to look, I'd take a shot at
> > it myself -- my Pro40 has wedged LEDs in 48kHz and the only Windows we
> > have in our household is on a small laptop without firewire.
> If ffado-mixer (and only ffado-mixer) is under concern, the answer is
> no.
> What I deduced from my own analysis is that, at the hardware level,
> LEDs level reflects the content of the first eight entries of the peak
> space (which is part of the EAP memory space); the configuration of
> the peak space is directly related to the content of the router space
> which, at least for Pro 40 and Pro 24, have to be ordered in a
> specific way.

Does that mean that EAP specific code could choose one of the routed
inputs/outputs, or just of the firewire ins and outs?

> ffado-mixer does not directly deal with this flash content and rather
> interacts through a kind of abstract interface (so as to be  able to
> work for many different devices, not specifically for dice eap).

As is right to do.

> Thus, a kind of "reset to hardware default" will whatever require some
> encoding inside the eap driver (dice-eap.cpp).

Sure. Which would need to be exposed in an abstract fashion to layers
above. The same holds true for the "hooking LED meters to arbitrary
ins/outs" crackpot idea of mine, if this can be done.

> > As I understand the reports I've read on the list and what I saw, one
> > seems to be able to map the LED meters to arbitrary signals on the
> > crossbar router. It'd be quite cool if ffado-mixer let users not only
> > fix the mapping to the default of the analog inputs, but anything the
> > hardware supports. Perhaps supply sane presets like analog/ADAT/Firewire
> > inputs and outputs (if the HW supports it).
> > 
> > What do you think?
> > 
> > Nils
> As far as I could test, routing any input signal to (some of) the
> 1394:01 to 1394:08 destinations (the first eight ones of the left
> column in crossbar router of ffado-mixer) leads to have the LEDs
> following this signal and not necessarily the analogic ones.

Ah so the default would be "display whatever gets sent over firewire on
the LED meters". Understood.

> What would be useful in the future, since Pro 40 and 24 offer a lot of
> different settings, is the possibility of saving different
> router/mixer setup (I mean file saving), as fixed by ffado-mixer, for
> easier swap (file reading) from one configuration to another one.

Yes, I'd really love to be able to save a presets for "jam session with
monitoring", "record the whole drum kit" and so forth. I also have some
ideas for a bit of a prettier UI, especially the crossbar router is a
bit awkward to use... Do you think I should rather make an
"experimental" frontend that hooks up on the dbus interface, or try to
get it to work in the existing codebase?

Nils
-- 
Nils Philippsen / Wilhelmstraße 22 / D-71229 Leonberg 
ni...@ti... / ni...@re...
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Ever noticed that common sense isn't really all that common?