9 Jun
2004
9 Jun
'04
10:36 a.m.
Sorry, you are correct. In JAMin it's center click. Jeez, I wrote it, I should
know these things :-\
Jan
On Wed, 9 Jun 2004 08:32 , Chris Cannam <cannam(a)all-day-breakfast.com> sent:
On Wednesday 09 Jun 2004 7:30 am, Richard Bown wrote:
On Tuesday 08 June 2004 20:22, Chris Cannam
wrote:
Ah well here we go again then, an inconsistency. You certainly do
double-click to zero a fader, but (again I hadn't thought to try this
before, but now I just have) you right-click to centre a knob. And
that is centre, rather than reset to default, which seems odd.
(btw, in JAMin it seems you actually middle-click, not right-click, to
reset a fader. At least in the version I have here.)
Chris On Tuesday 08 Jun 2004 7:46 pm,
eviltwin69(a)cableone.net wrote:
Actually no - you right click in RG to center a fader. Double
click doesn't do anything AFAICT so maybe you dreamt that. Right click on any slider in JAMin and it
immediately goes
to the default position, whether center or zero.
Ah, now I looked for that feature but didn't find it. In
Rosegarden you double-click to zero a fader. I didn't think of
right-clicking. 
9 Jun
9 Jun
10:56 a.m.
New subject: [linux-audio-dev] Is ladspa actually la-dsp-a? Is JACK the ultimate solution?
If developers don't know how to operate their own apps then we have a
serious problem :)
Marek
On Wed, 2004-06-09 at 14:13, eviltwin69(a)cableone.net wrote:
Sorry, you are correct. In JAMin it's center
click. Jeez, I wrote it, I should
know these things :-\
Jan
On Wed, 9 Jun 2004 08:32 , Chris Cannam <cannam(a)all-day-breakfast.com> sent:
On Wednesday 09 Jun 2004 7:30 am, Richard Bown
wrote:
On Tuesday 08 June 2004 20:22, Chris Cannam
wrote:
Ah well here we go again then, an inconsistency. You certainly do
double-click to zero a fader, but (again I hadn't thought to try this
before, but now I just have) you right-click to centre a knob. And
that is centre, rather than reset to default, which seems odd.
(btw, in JAMin it seems you actually middle-click, not right-click, to
reset a fader. At least in the version I have here.)
Chris On Tuesday 08 Jun 2004 7:46 pm,
eviltwin69(a)cableone.net wrote:
> Right click on any slider in JAMin and it immediately goes
> to the default position, whether center or zero.
Ah, now I looked for that feature but didn't find it. In
Rosegarden you double-click to zero a fader. I didn't think of
right-clicking.
Actually no - you right click in RG to center a fader. Double
click doesn't do anything AFAICT so maybe you dreamt that. 
10:59 a.m.
New subject: [linux-audio-dev] Is ladspa actually la-dsp-a? Is JACK the ultimate solution?
On Wed, Jun 09, 2004 at 05:13:18AM -0700, eviltwin69(a)cableone.net wrote:
Sorry, you are correct. In JAMin it's center
click. Jeez, I wrote it, I should
know these things :-\
Heh, seems that noone knows how thier app works :)
Seems like a good time to decide an Linux Audio Developer HIG extension.
A little bit of meter standardisation wouldn't hurt - eg. the point at
which people show red seems to vary a lot, which has been confusing for
users.
- Steve
11:27 a.m.
New subject: audio widgets etc, was Re: [linux-audio-dev] Is ladspa actually la-dsp-a? Is JACK the ultimate solution?
On Wednesday 09 Jun 2004 1:50 pm, Steve Harris wrote:
A little bit of meter standardisation wouldn't
hurt - eg. the point
at which people show red seems to vary a lot, which has been
confusing for users.
Also is there a common convention for how dB levels map to positions
on a fader or meter?
Rosegarden has fader travel proportional to the square root of dB
level (or fabs thereof) either side of zero, and our meters show
orange from -2dB and red from 0.
If there's right or wrong about all this, I'd like to know.
Chris
11:46 a.m.
New subject: audio widgets etc, was Re: [linux-audio-dev] Is ladspa actually la-dsp-a? Is JACK the ultimate solution?
On Wed, Jun 09, 2004 at 02:35:56PM +0100, Chris Cannam wrote:
On Wednesday 09 Jun 2004 1:50 pm, Steve Harris wrote:
Yes, IEC-268:
float iec_scale(float db)
{
float def = 0.0f; /* Meter deflection %age */
if (db < -70.0f) {
def = 0.0f;
} else if (db < -60.0f) {
def = (db + 70.0f) * 0.25f;
} else if (db < -50.0f) {
def = (db + 60.0f) * 0.5f + 5.0f;
} else if (db < -40.0f) {
def = (db + 50.0f) * 0.75f + 7.5;
} else if (db < -30.0f) {
def = (db + 40.0f) * 1.5f + 15.0f;
} else if (db < -20.0f) {
def = (db + 30.0f) * 2.0f + 30.0f;
} else {
def = (db + 20.0f) * 2.5f + 50.0f;
}
return def;
}
It also defines which points you should mark on your scale.
- Steve
A little bit of meter standardisation
wouldn't hurt - eg. the point
at which people show red seems to vary a lot, which has been
confusing for users.
Also is there a common convention for how dB levels map to positions
on a fader or meter?
12:02 p.m.
New subject: audio widgets etc, was Re: [linux-audio-dev] Is ladspa actually la-dsp-a? Is JACK the ultimate solution?
On Wednesday 09 Jun 2004 2:37 pm, Steve Harris wrote:
Yes, IEC-268:
[...]
I think you may have just revealed about 20 quid's worth of standards
publication material, judging from the pricing on the IEC website.
It also defines which points you should mark on your
scale.
And can I see what these are by looking at e.g. Ardour or Cubase
meters? Do these apps follow the same standard?
Chris
1:21 p.m.
New subject: audio widgets etc, was Re: [linux-audio-dev] Is ladspa actually la-dsp-a? Is JACK the ultimate solution?
On Wed, Jun 09, 2004 at 03:10:30PM +0100, Chris Cannam wrote:
JAMin has a complient implementation: gtkmeter*.c
- Steve
On Wednesday 09 Jun 2004 2:37 pm, Steve Harris wrote:
You can get them through the British Standards which I have a site licence
for - I'l mail you the spec when I get a chance, its pretty thin, so dont
pay for it.
Yes, IEC-268:
[...]
I think you may have just revealed about 20 quid's worth of standards
publication material, judging from the pricing on the IEC website. It also
defines which points you should mark on your scale.
And can I see what these are by looking at e.g. Ardour or Cubase
meters? Do these apps follow the same standard? 
2:05 p.m.
New subject: audio widgets etc, was Re: [linux-audio-dev] Is ladspa actually la-dsp-a? Is JACK the ultimate solution?
On Wed, Jun 09, 2004 at 02:37:31PM +0100, Steve Harris wrote:
Yes, IEC-268:
...
It also defines which points you should mark on your scale.
Does it also define the 'ballistics' ? ISTR this is a very
fast rise time 'absolute peak' type of meter. Depending on
the job at hand, a user may prefer another response that is
closer to the subjective sound level.
--
FA
8:34 p.m.
New subject: audio widgets etc, was Re: [linux-audio-dev] Is ladspa actually la-dsp-a? Is JACK the ultimate solution?
On Wed, Jun 09, 2004 at 05:56:37PM +0200, Alfons Adriaensen wrote:
On Wed, Jun 09, 2004 at 02:37:31PM +0100, Steve Harris
wrote:
IEC-268 is a peak meter, so its rise time should be as fast as possible -
the decay time is very slow, but I foget what it is.
There are other meters that have slow-rise and/or subjective volume
readings, eg. A-weighting.
- Steve
Yes, IEC-268:
...
It also defines which points you should mark on your scale.
Does it also define the 'ballistics' ? ISTR this is a very
fast rise time 'absolute peak' type of meter. Depending on
the job at hand, a user may prefer another response that is
closer to the subjective sound level.
7:40 p.m.
New subject: [linux-audio-dev] Is ladspa actually la-dsp-a? Is JACK the ultimate solution?
On Wed, 2004-06-09 at 07:13, eviltwin69(a)cableone.net wrote:
Sorry, you are correct. In JAMin it's center
click. Jeez, I wrote it, I should
know these things :-\
Jan
But obviously I don't...Doh! It's right click to go to default in all
sliders that have a default. The compressors, crossovers, and limiter
time don't really have a default (but I could put one in if Steve will
tell me what it should be ;-)
Jan
On Wed, 9 Jun 2004 08:32 , Chris Cannam
<cannam(a)all-day-breakfast.com> sent:
On Wednesday 09 Jun 2004 7:30 am, Richard Bown
wrote:
On Tuesday 08 June 2004 20:22, Chris Cannam
wrote:
Ah well here we go again then, an inconsistency. You certainly do
double-click to zero a fader, but (again I hadn't thought to try this
before, but now I just have) you right-click to centre a knob. And
that is centre, rather than reset to default, which seems odd.
(btw, in JAMin it seems you actually middle-click, not right-click, to
reset a fader. At least in the version I have here.)
Chris On Tuesday 08 Jun 2004 7:46 pm,
eviltwin69(a)cableone.net wrote:
> Right click on any slider in JAMin and it immediately goes
> to the default position, whether center or zero.
Ah, now I looked for that feature but didn't find it. In
Rosegarden you double-click to zero a fader. I didn't think of
right-clicking.
Actually no - you right click in RG to center a fader. Double
click doesn't do anything AFAICT so maybe you dreamt that.
8:35 p.m.
New subject: [linux-audio-dev] Is ladspa actually la-dsp-a? Is JACK the ultimate solution?
On Wed, Jun 09, 2004 at 04:33:10PM -0500, Jan Depner wrote:
Heh, your guess is as good as mine.
- Steve
Sorry, you are
correct. In JAMin it's center click. Jeez, I wrote it, I should
know these things :-\
But obviously I don't...Doh! It's right click to go to default in all
sliders that have a default. The compressors, crossovers, and limiter
time don't really have a default (but I could put one in if Steve will
tell me what it should be ;-)
7468
days inactive
7468
days old
linux-audio-dev@lists.linuxaudio.org
10 comments
6 participants
participants (6)
-
Alfons Adriaensen -
Chris Cannam -
eviltwin69＠cableone.net -
Jan Depner
-
Marek Peteraj -
Steve Harris