Volumio2 audio buffer

Hello where can i change de audio buffer of volumio 2 directly on code?
I edited /etc/mpd.conf but only the buffer before play works. Audio buffer doesn t make a difference what number i write because in ouput i always see the same buffer with this command
cat /proc/asound/card*/pcmp/sub/hw_params


can anyone help?

care to explain why you want to change the buffer size?

I would like to see what it does to the sound.