Fade is not working if sound has current volume equal zero

[Oldes]

This works OK:

ma_sound_set_fade_in_pcm_frames(pSound, 0, 1.0, 44100);

But when the sound first have set volume to zero, the fade is not started.

ma_sound_set_volume(pSound, 0);
ma_sound_set_fade_in_pcm_frames(pSound, -1, 1.0, 44100);

It is most probably because zero volume sounds are skipped from processing, but still, should not it be supported without manually setting the volume to some almost zero value?

[Oldes]

Hm... it looks that the fader has separate volume values and the volume set ma_sound_set_volume is not affected by the fader... I wonder how I could change the volume value with a fade?

[mackron]

This is intended behaviour. The two are decoupled like you discovered. There's no built-in way to smoothly change the volume itself.

(Converting this one to a discussion.)