linuxaudio.org

On Wed, Aug 11, 2010 at 12:26:19PM -0700, Niels Mayer wrote:
> On Tue, Aug 10, 2010 at 11:24 AM, Tim E. Real  wrote:

quoted text
>

> > If we put a pre/post fader button on each digital mixer strip,

> >  then in post mode the user would have to understand that

> >  what is shown on the meter is affected by the sum of the

> >  digital mixer slider level and some corresponding analog slider level.

> > That is what is ultimately feeding the mixer after the fader, isn't it?

> > So this information would be useful to show, wouldn't it?

> > It is readily 'available', am I correct?:

> >  post-fader meter value = pre-fader meter dB value + slider dB value

>

> While it is true that "mudita24's" meters are perpetually in PFL

> (prefade listen) mode -- and this can be confusing to those expecting

> an analog mixer, the

> AFL (after-fade listen) metering doesn't necessarily make sense in

> this mixer. In this case, it doesn't convey new information. In an

> analog mixer, for  example, it could indicate you've applied too much

> gain/eq even if the PFL's were in-range.

Not really, EQ normally being pre-fader. Post-fader meters in a mixer

strip are useful only of the signal being metered is actually one

that is physically available on some connector, e.g. as a direct out.

It would not indicate any overload that occurs pre-fader.
If the signal just goes to a mixing bus (as in the case we are discussing)

then it's individual level is irrelevant - the level on the mixing bus (all

signals summed) may be. But in this case you can't overload the mixing

bus, so even that would be useless.
> An initial problem in viewing mudita24 as a "mixer" : if the "mute" is

quoted text
> on, it doesn't display that, nor the contribution of the faders to the

> resulting stereo mix.  However, this app is also, or perhaps mostly,

> to be used as an input leveling and metering utility alongside a real

> mixer and real metering solution in a DAW. The mixer might be used for

> it's traditional purpose as a "zero-latency monitoring" solution for

> performers, while relegating the final mix to ardour or qtractor --

> both of which implement their own mixer and metering and work in the

> expected ways as a mixer. 

Yes, it can be used in two different ways. If you don't need the zero

latency monitoring (e.g. when the card is connected to a real mixer

anyway) you would not use the card's mixer at all, and set fixed

analog gains.
> > However I realised yesterday that each digital mixer strip is STEREO.

quoted text
> > That means for post-fader metering, we would need to split the current

> > single meter into two meters - left and right.

>

> Not if you use the idea of a single fader and a panpot. Then the meter

> would be displaying the post-fader level, and the panpot would be

> determining how that is actually mapped to the individual channels.

In this case, just individual buttons for L and R instead of the panner

would be just fine, and you wouldn't need the mute buttons anynore.
Ciao,
--

FA
There are three of them, and Alleline.
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