Tremolo is an EP

Extended play

An EP is a musical recording which contains more music than a single, but is too short to qualify as a full album or LP. The term EP originally referred only to specific types of vinyl records other than 78 rpm standard play records and LP records, but it is now applied to mid-length Compact...

 by My Bloody Valentine, released in February 1991 by Creation Records

Creation Records

Creation Records was a British independent record label headed by Alan McGee. Along with Dick Green and Joe Foster, McGee founded Creation in 1983. The label lasted until its demise in 1999. The name came from the 1960s band The Creation , whom McGee greatly admired. McGee, Green and Foster were...

. The title is a reference to the band's heavy usage of guitar tremolo

Tremolo

Tremolo, or tremolando, is a musical term that describes various trembling effects, falling roughly into two types. The first is a rapid reiteration...

 and vibrato

Vibrato

Vibrato is a musical effect consisting of a regular, pulsating change of pitch. It is used to add expression to vocal and instrumental music. Vibrato is typically characterised in terms of two factors: the amount of pitch variation and the speed with which the pitch is varied .-Vibrato and...

 to create blurred, dreamlike tones. (Kevin Shields

Kevin Shields

Kevin Patrick Shields is an American-born, Irish vocalist, guitarist, and producer of alternative rock band My Bloody Valentine....

' method of strumming chords while simultaneously bending his guitar's tremolo/ whammy bar was referred to as "glide guitar.")

The lead track, "To Here Knows When", has a longer and more ethereal coda

Coda (music)

Coda is a term used in music in a number of different senses, primarily to designate a passage that brings a piece to an end. Technically, it is an expanded cadence...

—essentially constituting a separate song—than the version later included on the album Loveless

Loveless (album)

Loveless is the second studio album by alternative rock band My Bloody Valentine. Released on 4 November 1991, Loveless was recorded over a two-year period between 1989 and 1991 in nineteen recording studios...

. "Swallow" also has an instrumental coda; "Honey Power" has one with wordless "ooh and ahh" vocalizing by Bilinda Butcher

Bilinda Butcher

Bilinda Jayne Butcher is a vocalist/guitarist for the rock band My Bloody Valentine.-Biography:Butcher was raised in London and then Derbyshire. She went on to study dance at Laban College in London, but she dropped out after a year due to developing a case of cystitis...

. All three segues/codas feature backwards guitar loops and heavy reverb

Reverberation

Reverberation is the persistence of sound in a particular space after the original sound is removed. A reverberation, or reverb, is created when a sound is produced in an enclosed space causing a large number of echoes to build up and then slowly decay as the sound is absorbed by the walls and air...

. In Nov. 1991, Shields commented:

"Tremolo had seven tracks on it, but you're not allowed to do that, so we called it four tracks and didn't name three of them. People just thought they were weird bits!"

http://www.mybloodyvalentine.net/press/nme-9nov91.html

The cover art was also used as one of the band's most popular t-shirt designs.

Videos were filmed for the songs "Swallow" and "To Here Knows When" under the direction of Angus Cameron

Angus Cameron (director)

Angus Cameron is a British director best known for his association with Creation Records during the 1990s, where he made music videos for Ride, My Bloody Valentine, Cathedral, Primal Scream and others...

.

7-inch

1. "To Here Knows When" (plus instrumental coda) – 5:46 *
2. "Swallow" (plus instrumental coda) – 4:52
   • Cat. no.: CRE085

12-inch

1. "To Here Knows When" (plus instrumental coda) – 5:46 *
2. "Swallow" (plus instrumental coda) – 4:52
3. "Honey Power" (plus coda) – 4:35 *
4. "Moon Song" – 3:23
   • Cat. no.: CRE085T
   • Also issued as a CD (CRESCD085)

Personnel

My Bloody Valentine

• Bilinda Butcher
  Bilinda Butcher
  Bilinda Jayne Butcher is a vocalist/guitarist for the rock band My Bloody Valentine.-Biography:Butcher was raised in London and then Derbyshire. She went on to study dance at Laban College in London, but she dropped out after a year due to developing a case of cystitis...
  
   – guitar
  Guitar
  The guitar is a plucked string instrument, usually played with fingers or a pick. The guitar consists of a body with a rigid neck to which the strings, generally six in number, are attached. Guitars are traditionally constructed of various woods and strung with animal gut or, more recently, with...
  
  , vocals
  Singing
  Singing is the act of producing musical sounds with the voice, and augments regular speech by the use of both tonality and rhythm. One who sings is called a singer or vocalist. Singers perform music known as songs that can be sung either with or without accompaniment by musical instruments...
  
  
• Colm Ó Cíosóig – drums
  Drum kit
  A drum kit is a collection of drums, cymbals and often other percussion instruments, such as cowbells, wood blocks, triangles, chimes, or tambourines, arranged for convenient playing by a single person ....
  
  
• Debbie Googe
  Debbie Googe
  Debbie Googe is the bassist for the rock band My Bloody Valentine.-My Bloody Valentine:Before joining My Bloody Valentine, she lived in Yeovil, Somerset and played for a band called Bikini Mutants, who gigged with The Mob...
  
   – bass guitar
  Bass guitar
  The bass guitar is a stringed instrument played primarily with the fingers or thumb , or by using a pick....
  
  
• Kevin Shields
  Kevin Shields
  Kevin Patrick Shields is an American-born, Irish vocalist, guitarist, and producer of alternative rock band My Bloody Valentine....
  
   – guitar, vocals, sampler
  Sampling (music)
  In music, sampling is the act of taking a portion, or sample, of one sound recording and reusing it as an instrument or a different sound recording of a song or piece. Sampling was originally developed by experimental musicians working with musique concrète and electroacoustic music, who physically...
  
  

Technical personnel

• Alan Moulder
  Alan Moulder
  Alan Moulder is one of Britain's premier alternative rock record producers. He has worked with such artists as Depeche Mode, Erasure, Elastica, Gary Numan, The Jesus and Mary Chain, Curve, Ride, Lush and My Bloody Valentine, Lostprophets, Shihad, Ivyrise and Placebo, as well as with many American...
  
   – engineering
• My Bloody Valentine – production
  Record producer
  A record producer is an individual working within the music industry, whose job is to oversee and manage the recording of an artist's music...
  
  
• Designland – design
• Sam Harris – photographer