> On 09.09.2018 15:21, Stefan Westerfeld via beast wrote:
> * volume_db = 0, panning = 0 -> left_volume = 1, right_volume = 1
> * volume_db = 0, panning = -100 -> left_volume = 1.41, right_volume = 0
> * volume_db = 0, panning = 100 -> left_volume = 0, right_volume = 1.41
> What you write here makes sense for libbse. How's the beast-gtk UI going to
> look
> for this though?
Instead of two volume sliders we only need one. The two meters could be put
next to each other. So this would mean left-to-right volume slider (only one
slider), scale numbers (-96..+12), left meter, right meter.
Ideal for pan would be a round knob, but we could for now use a slider above
the other widgets left to right (where left is -100%, right is +100%).
> At least using (sqrt(2) ~= 3dB) is what I believe is the correct value here,
> I'd
> have to double-check that before implementing it.
> The monitoring code for our level meters uses dB SPL, which is 20log10(avg)
> and
> corresponds to the power ratio of the signal, so the value to use here would
> be
> more around 2. See also: https://en.wikipedia.org/wiki/Decibel#Acoustics_2
Lets discuss details not now, but when I've written the code.
> Also sync is no longer needed
> then, and should be removed.
> The sync property is saved im BSE files, so we need compat loading code at
> least. If sync is to be removed from the UI depends on how that's designed and
> implemented to cope with panning. Thus my question above.
Right, it should be ignored during read (real compat code is just needed to
translate the stored left and right factors => volume/pan). Sync == true files
will have identical values for left and right volume, so sync is not needed to
load the file, and sync == false files will have their panning information in
left and right volume, so this needs to be translated.
There need no longer be a widget for sync either, as using the volume slider
affects both, and using pan == 0 is the exact behaviour of our previous sync ==
true mode.
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