let abuf = alloc_audio_buffer(self.ainfo, samples, self.chmap.clone())?;
let mut adata = abuf.get_abuf_i16().unwrap();
let off1 = adata.get_offset(1);
let abuf = alloc_audio_buffer(self.ainfo, samples, self.chmap.clone())?;
let mut adata = abuf.get_abuf_i16().unwrap();
let off1 = adata.get_offset(1);