Question about ABR Presets on CBR mode

HI,
​
I noticed ABR presets applied when CBR is on.
​
A side effect of this is decreasing loudness on low bitrates(~192kbps).
​
libmp3lame/presets.c ---------------
​
/* ABR seems to have big problems with clipping, especially at low bitrates */
/* so we compensate for that here by using a scale value depending on bitrate */
lame_set_scale(gfp, lame_get_scale(gfp) * abr_switch_map[r].scale);
​
------------------------------------
​
Is this a bug, or a feature? Is apply_abr_preset necessary for CBR?
​
Regards,
Jang Ryeol

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