[pulseaudio-discuss] Per-app flat volume adjustment is highly unintuitive, if mathematically consistent.

[CJ van den Berg]

On Thu, May 28, 2009 at 01:33:48AM +0200, Lennart Poettering wrote:
> On Thu, 28.05.09 00:53, CJ van den Berg (cj at vdbonline.com) wrote:
> 
> > > I am not convinced. Think about this scenario: you have one stream
> > > playing. Reference sink volume, virtual sink volume and stream volume
> > > are at -inf dB. Now you move stream volume to 0 dB. This would not
> > > change the reference volume level, but would set the virtual volume to
> > > 0 dB. According to your suggestion the UI would stick to the ref
> > > volume, and hence you get *full* output with the UI showing volume at
> > > -inf dB. I am pretty sure that people would be confused about that
> > > even more than they are with the current logic.
> > 
> > Well, I think the stream volume should ‘push’ the reference volume. ie.
> > if stream volume > reference volume then reference volume == stream
> > volume. The would be pretty intuitive if you ask me.
> 
> Doesn't work either since this reintroduces all the problems that made
> us come up with the concept of the ref volume in the first place:
> 
> If a stored volume for a stream says 2 dB more than ref volume, then
> when we apply this we will change the ref volume itself (since we need
> to 'push' it as you suggest). i.e. before the stream appeared we where
> at ref volume x, when it appeared we set the ref volume to x+2dB.

This doesn’t make sense. If the stream volume slider ‘pushes’ the ref
volume slider, then the stream volume can never be > 0 dB (relative to
the ref volume). For legacy stored stream volumes > 0 dB, just round
them down to 0 dB. And there is no need to store it after rounding
either.

CJ
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