[alsa-devel] Maximum 50 dB gain in ALSA softvol plugin

[Ricard Wanderlof]

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
-- 
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