Hello, I'm a music related programmer in Korea. sorry ugly English
I'm under development of MP3 Decoder. in particular, I'm interested in voulmn normalization.
So looking for various data, I found your great documentation in the replaygain.org.
I'm wondering about the following formula of the Scale to the Replay Gain Secion (http://replaygain.hydrogenaudio.org/player_scale.html).

scale=10.^(replay_gain/20);

This formula is shown in the Decoder(Winamp plugin, MPG123 and so on) using ReplayGain.
I don't know what it is.
I was wondering if it is possible for me to get more details.

Thank you for reading.

I did not read the text you linked, but the formula looks quite typical.
This formula calculates the scale factor from the replay_gain value which comes in dB.

[Edit] Added first sentence, fixed typos

dB is defined as 20*log10(ratio)
ratio therefore is found as: ratio = 10^(db/20)