Successful response from replaygain.setPreamp.
replaygain.setPreamp
Whether the call changed anything.
Always true here; a failed call resolves with ApiFailure instead.
true
ApiFailure
Preamp applied to tracks without ReplayGain, in dB.
Preamp applied to tracks that carry ReplayGain, in dB.
Successful response from
replaygain.setPreamp.