About ogg123 can't adjust volumn

[UNIONDONG]

Dear All：
I'm really sorry to bother you，I am using vorbis-toos to develop and I want to adjust the volume，but I don't find the relevant usage method。
I don't know ogg123 is or not support adjust the volume with software method（Ps：I have no sound card，only use pcm），Hope everybody helps answer，thanks very much！