rem: sample_size = stream->b16 + 1;
add: sample_size = stream->bitsPerSample / 8;
context: echo_stream_get_nth_buffer(echo_stream *stream, uint8 chan, uint8 buf, 					char** buffer, size_t *stride){	uint8 			sample_size, frame_size;	LOG(("echo_stream_get_nth_buffer\n"));		sample_size = stream->b16 + 1;	frame_size = sample_size * stream->channels;		*buffer = (char*)stream->buffer->log_base + (buf * stream->bufframes * frame_size)		+ chan * sample_size;	*stride = frame_size;		return B_OK;}