Tomorrow Never Knows

歌曲的演唱聲音被接入Leslie speaker音箱中（一種原來是被用作哈蒙德風琴的擴音器），並用一種自動雙軌道技術（ADT）把聲音加倍處理。每位披頭在家都要各自創作些奇怪的聲音讓混音時應用。這些不同的聲音在混音時會用不同的速度播放，常常更是用「倒轉」的重放法去混合在一起。列儂做了8條循環聲帶，將它們分成八部錄音機播放，聲音在Ringo Starr勻速但不標準的鼓聲中淡入和淡出然後隨心意的將聲音淡入或淡出。麥卡特尼的循環聲帶收錄了他自己的笑聲，那聽起來像鳥類的聲響。這首歌也是flanger effect在樂器上的首次使用之一。

歌曲經常被評為史上最偉大的歌曲之列，Pitfork Media在其“The 200 Greatest Songs of the 1960Ss”中將其評為第19名，滾石雜誌也將其選入“500 Geatest Songs of All-Time”。

John Lennon – 雙軌主唱，哈蒙德風琴，錄音帶

Paul McCartney – 貝斯，倒轉的吉他獨奏，錄音帶

George Harrison – 西塔琴，冬不拉，錄音帶

Ringo Starr – 鼓，手鼓，錄音帶

George Martin – 鋼琴，製作人

Geoff Emerick – 工程師

人員信息來源於Ian MacDonald ^[1] 

Turn off your mind, relax and float down stream,

It is not dying, it is not dying

Lay down all thoughts, surrender to the void,

It is shining, it is shining.

Yet you may see the meaning of within

It is being, it is being

Love is all and love is everyone

It is knowing, it is knowing

And ignorance and hate mourn the dead

It is believing, it is believing

But listen to the colour of your dreams

It is not leaving, it is not leaving

So play the game "Existence" to the end

Of the beginning, of the beginning ^[2]