Assembly: Bass.Net (in Bass.Net.dll) Version: 126.96.36.199
Property ValueType: Double
Values between -Infinity and less than 0.0 dB will actually be an attenuation of the signal level.
Values above 0.0 dB will actually be an amplification of the signal level, whereas a value of exactly 0.0 will leave the signal level unmodified.
The gain can also be applied directly via Gain (factor, Min.: 0.0, Max.: 1024.0, no amplification at 1.0).