12 Jan
2018
12 Jan
'18
5:02 p.m.
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.
/Ricard
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Ricard Wolf Wanderlöf ricardw(at)axis.com
Axis Communications AB, Lund, Sweden www.axis.com
Phone +46 46 272 2016 Fax +46 46 13 61 30