[QLab] Absolute fade curve

[ningru guo]

Hi guys,

Realised that when you add a point to the integrated fade envelope under the Settings tab of the inspector (for an audio cue), it does not appear to be an absolute value. Instead, it acts like a gradient? (correct me if I'm wrong). And this bothers me because if lets say I want to fade the audio file from at 0:30 to 0:35 from 0dB to -10dB and let it STAY at -10dB, it wont work. Instead, if you check the points along the "straight line" after the fade down, there will be points that reach below -10dB (that's even if you set the final point at the end of the track to -10dB as well) so the line between the two points of -10dBs is not a straight line.

Not sure how it works now is useful for you guys, but its bothering me quite a bit if I wanted the level to stay the same.

Any tips to get around this?

Ning

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[luckydave]

Ning -

I think you just need to add another curve point on top of the one that defines the curve, to make it a sharp corner.

Do the things that please you, and do them well.

--- On Tue, 2/16/10, ningru guo <ningr...@hotmail.com> wrote:

> From: ningru guo <ningr...@hotmail.com>
> Subject: [QLab] Absolute fade curve
> To: ql...@lists.figure53.com
> Date: Tuesday, February 16, 2010, 11:04 AM
>
>
>
>
>
> Hi guys,
> Realised that when you add a point to the
> integrated fade envelope under the Settings tab of the
> inspector (for an audio cue), it does not appear to be an
> absolute value. Instead, it acts like a gradient? (correct
> me if I'm wrong). And this bothers me because if lets
> say I want to fade the audio file from at 0:30 to 0:35 from
> 0dB to -10dB and let it STAY at -10dB, it wont work.
> Instead, if you check the points along the "straight
> line" after the fade down, there will be points that
> reach below -10dB (that's even if you set the final
> point at the end of the track to -10dB as well) so the line
> between the two points of -10dBs is not a straight
> line.
> Not sure how it works now is useful for you
> guys, but its bothering me quite a bit if I wanted the level
> to stay the same.
> Any tips to get around this?
>
> Ning

> Hotmail:
> Trusted email with Mi
> crosoft’s powerful SPAM protection. Sign up
> now.
>

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[ningru guo]

actually i've tried that and it does straighten the curve abit, but there will be still 0.3db differences if you check along the entire line. :(

if it could work like how automation in logic works it'd be great. but not sure how useful would this be to all of you.

Ning

-----------------

Date: Tue, 16 Feb 2010 08:10:14 -0800 (PST)
From: luckydave <lucky...@yahoo.com>
To: "Discussion and support for QLab users." <ql...@lists.figure53.com>
Subject: Re: [QLab] Absolute fade curve
Message-ID: <679774....@web36708.mail.mud.yahoo.com>
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[Michael Keniger]

I would like to see this too.  In my DAW software you can choose if the line between points is a fast/slow curve, s-shape, straight line of square-wave shaped (the value snaps from one level to another at the second of the two points).

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From: ningr...@hotmail.com

actually i've tried that and it does straighten the curve abit, but there will be still 0.3db differences if you check along the entire line. :(

if it could work like how automation in logic works it'd be great. but not sure how useful would this be to all of you.

---

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[Sean Dougall]

Hi Ning -

The farther you zoom in, the closer you can get the points together and the more linear the time after it will be. As an example, here's a screenshot that fades down from 0dB to -10dB and stays within 0.1dB of that until the end of the file. You can extend the inspector's height to get more vertical resolution and use the zoom buttons to zoom in horizontally. Generally a change of 0.3dB is considered to be well within the threshold that the average ear can discern, but if you want to be more precise, the option is there.

I'm a happy Logic user, but I always find myself wishing its automation curves worked more like QLab. :) Of course, we're always looking to refine QLab's interface... Maybe there's a happy medium we could find for a future version -- I can see how it might be useful to have an easier way to get sharp corners, but I personally wouldn't want to give up the ease with which you can make a more natural-sounding fade curve.

Sean

[Sean Dougall]

Eh… forgot to add: Another option that might be appropriate in the
case you describe would be just to use a fade cue instead of the
integrated envelope. That would guarantee that the levels won't keep
changing after the fade finishes.

Sean

(mobile)

On Feb 17, 2010, at 9:03 AM, Sean Dougall <se...@figure53.com> wrote:

> Hi Ning -
>
> The farther you zoom in, the closer you can get the points together
> and the more linear the time after it will be. As an example, here's
> a screenshot that fades down from 0dB to -10dB and stays within
> 0.1dB of that until the end of the file. You can extend the
> inspector's height to get more vertical resolution and use the zoom
> buttons to zoom in horizontally. Generally a change of 0.3dB is
> considered to be well within the threshold that the average ear can
> discern, but if you want to be more precise, the option is there.
>