《梦溪笔谈·乐律二》
今天的人贪图省事，不再用弦管乐器定声，所以声音的高低没有定准，都是临时调配。
今人苟简，不復以弦管定声，故其高下无準，出于临时。
Today’s people are lazy and no longer use string and wind instruments to fix the pitch; therefore, the pitch is not fixed and is subject to the temporary adjustment.