Re: [tim-janik/beast] Most Bus properties ported to C++ (#78)

[Stefan Westerfeld <notifications github com>]

New API: left_volume_db, right_volume_db - values passed in actual dB, these values can still be different when read even if sync is enabled.

Not commenting ot the other issues here, but I think this is also suboptimal. If I have to touch this code at all, and write compat code, I believe the proper way to do it would be

• volume_db (-96 to 24)
• panning (-100% to 100%)

What I usually want to do as composer is simply move the bus more to the left or right, without affecting overall volume. To implement this, I think the right way to do it is to make the signal louder if it is not being played on both channels but just on one. So

• 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

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. Also sync is no longer needed then, and should be removed.

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