12 Jan
2018
12 Jan
'18
5:36 p.m.
On Fri, 12 Jan 2018 17:02:03 +0100, Ricard Wanderlof wrote:
Hi,
The ALSA softvol plugin has a maximum gain of 50 dB (MAX_DB_UPPER_LIMIT is fixed to 50 in pcm/pcm_softvol.c). Is there some technical reason for this limit? These days when >16 bit audio is becoming common, it's not unreasonable to have large gain figures, and that is in fact a usecase I have right now.
I'm looking through the CONVERT_AREA and MULTI_DIV_foo macros to see if there's something there that degenerates when the gain factor becomes too large, but I'd thought I'd ask too rather than just do reverse engineering.
There is no more reason than "some reasonable limit".
Takashi