[Ardour-Users] AFL monitor issues on A3b5

[Paul Davis]

On Sat, Jul 28, 2012 at 12:25 PM, michael noble <looplog at gmail.com> wrote:

>
> Yes, I don't want to affect the master. I want to "listen" to the track,
> via the monitor at [post-fader but before the mute] in the signal chain.
>

the mute point in ardour isn't a single point, btw. right click on the mute
button for options.


> In other words, After Fader Listen, or at least what I thought AFL stood
> for. This way I can listen to incoming live feeds, with effects, and then
> drop them in the master for output to the PA by un-muting the track. In
> other words, listen to live feeds in headphones before dropping them into
> the mix. Perhaps my live use is at odds with studio use. I guess this is
> what is called the "cue" switch on hardware DJ mixers.
>

yes, DJ consoles operate pretty differently from studio or live PA
consoles. the cue switch is something ardour doesn't have (true of most
DAWs, and has a lot to do with the reasons why tools like Traktor exist).


>
> i don't think there is any way to do what you want, not in ardour
>>
> , or on any console that provides AFL/PFL. this suggests that you should
>> probably rethink what you want :) what are you trying to do that requires
>> this?
>>
>>
> Actually I jury-rigged to get what I want by using a post-fader send in
> each track,
>

sure, i meant "with pre-defined routing" :)

with a midi controller setting the send volume. I say jury-rigged because
> this requires using puredata to generate midi messages, as Ardour sliders
> don't seem to accept single midi values to set their level at a specific
> volume. If i send say, a value of 127 to the CC assigned to midi of the
> send level, then the gain level does not change to 127. I guess this has
> something to do with controller pickup logic.
>

all the gain controls in ardour use a non-linear, volumetric control curve,
as most h/w consoles do. when the fader is near 0dB, you have very fine
control; as it moves further away from 0dB it takes fewer pixels or
millimeters of motion to change by a given number of dB.

so that physical MIDI faders provide the same feel, MIDI control obeys this
mapping - the incoming value range of 0..127 is mapped to this non-linear
volumetric gain control. 0 = -inf dB,  0dB being at about 0.717 * 127 = 91,
and 127 == +6dB

i'm also not clear on what a "gain level of 127" would mean, btw.


> So to actually change the volumes I have to send a line of controller
> increments over a 500 millisecond period. In other words, automated
> fade-ins or fade-outs.
>

no, you don't. Ardour will do its own ramping of values. i'm not sure why
you concluded this.


> age of this approach is that it is flexible - I can listen in at any point
> in the signal chain by simply sliding the send up or down. If sends had a
> mute I guess I could do what I originally wanted, and retain this
> flexibility.


the led button in the send as represented in the mixer strip is an on/off
which effectively mutes (with a declick, IIRC)
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