# List of Soft Machine and spin-off band members

Soft Machine are an English jazz-rock band from Canterbury. Formed in mid-1966, the group originally consisted of drummer and vocalist Robert Wyatt, guitarists Daevid Allen and Larry Nowlin, bassist and vocalist Kevin Ayers, and keyboardist Mike Ratledge. The current lineup of the band features guitarist John Etheridge (1975–1978, 1984 and since 2015), saxophonist, keyboardist Theo Travis (since 2015), bassist Fred Baker (since 2020) and drummer Asaf Sirkis (since 2022).

## History
### Original run

Soft Machine were formed in mid-1966 by drummer and vocalist Robert Wyatt, guitarists Daevid Allen and Larry Nowlin, bassist and vocalist Kevin Ayers and keyboardist Mike Ratledge. Wyatt, Allen and Ratledge had first worked together in 1963 as the Daevid Allen Trio, after which Wyatt and Ayers co-founded the Wilde Flowers in late 1964 and Mister Head in early 1966, the latter with Allen and Nowlin. Mister Head was short-lived and in mid-1966 Wyatt, Ayers, Allen and Nowlin joined Ratledge to form Soft Machine. Nowlin's time with the band was brief, leaving less than two months after the band formed, reducing them to a quartet. Soft Machine released a single, "Love Makes Sweet Music", in February 1967. Six months later they were reduced to a trio, when Allen, an Australian, was denied re-entry to the UK following a tour of France, after overstaying his visa. Wyatt, Ayers and Ratledge recorded Soft Machine's self-titled debut album in April 1968, which was issued at the end of the year. After the album's completion, Andy Summers joined the band on guitar, though he left after just two months returning the band to a trio. After a final American tour, opening for the Jimi Hendrix Experience, Ayers left Soft Machine in September 1968.
Wyatt and Ratledge rebuilt Soft Machine in December 1968 with Hugh Hopper replacing Ayers on bass. Another former member of the Daevid Allen Trio and the Wilde Flowers, Hopper had previously guested on Soft Machine's debut album. This new lineup recorded Volume Two during early 1969, and eventually released in September that year. After guesting on the Volume Two sessions, Hopper's brother Brian Hopper, another Wilde Flowers founder, joined the band on saxophone in May 1969. After five months, Brian Hopper departed, with Wyatt, Ratledge and Hugh Hopper expanding the band to a septet with the addition of a four-piece horn section: saxophonists Elton Dean and Lyn Dobson, cornet player Mark Charig and trombonist Nick Evans. Both Charig and Evans left after two months due to "financial and logistical challenges", while Dobson also left the band in March 1970.
After the release and promotion of Third and Fourth, Wyatt was fired in August 1971. Wyatt's replacement was initially Australian drummer Phil Howard. However, after half of the next album Fifth was recorded, Howard himself was replaced by John Marshall. After Fifth was completed, Dean also left in mid-1972 and was replaced by Karl Jenkins, a former bandmate of Marshall's in Nucleus. The group issued Six the next year, which was Hopper's last album before departing in May 1973. He was replaced by Roy Babbington, another former Nucleus member who had previously worked with Soft Machine as a session musician, playing double bass on Fourth and Fifth. In November 1973, the group became a quintet again with the addition of Allan Holdsworth (another Nucleus alumnus) as their first guitarist in five years. This lineup recorded the album Bundles and managed to stay together until April 1975, when Holdsworth departed. He recommended John Etheridge as his replacement. At the beginning of 1976, saxophonist Alan Wakeman was added, at which point Jenkins stopped playing saxophone and oboe and focused solely on keyboards. In March 1976, the band were left with no original members when Ratledge chose to leave.
After the release of Softs in 1976, Soft Machine's lineup continued to change regularly. Wakeman left in July, just after the album's release, and was replaced briefly by Ray Warleigh, who had worked with the band previously as a session player on Bundles. For a European tour later in the year, Ric Sanders joined on violin and Percy Jones of Brand X took over from Babbington, who had suddenly quit. Jones declined to join on a full-time basis and was replaced by Steve Cook. Live shows in 1977 spawned the band's first completely live release, Alive & Well: Recorded in Paris. After a final show in December 1978, as a quartet without Sanders and with Allan Holdsworth returning to replace Etheridge, Soft Machine disbanded and members went their separate ways.

### Occasional reunions

The Soft Machine name was briefly revived in 1980 for Land of Cockayne. In the summer of 1984, Soft Machine reformed once again for a short run of shows at Ronnie Scott's Jazz Club, with the band comprising John Marshall, Karl Jenkins, Ray Warleigh, John Etheridge, Paul Carmichael and Dave MacRae.

### Early spin-off bands

In 1978, former Soft Machine bassist Hugh Hopper and saxophonist Elton Dean formed the spin-off band Soft Heap, with former National Health keyboardist Alan Gowen and drummer Pip Pyle. For their first tour, Pyle was temporarily replaced by Dave Sheen due to other commitments, and the group (renamed Soft Head) issued the live album Rogue Element by the end of the year. With Pyle back on drums, the band recorded a self-titled debut album in late 1978, which was issued early the following year. National Health's John Greaves later replaced Hopper and guitarist Mark Hewins joined after Gowen's death in 1981, with this second incarnation recording the live album A Veritable Centaur released in 1995. A live album recorded by the original Soft Heap lineup of Hopper, Dean, Gowen and Pyle in 1978 was released as Al Dente in 2008.

### Later spin-off bands

Over ten years after the last Soft Machine spin-off band, Hugh Hopper and Elton Dean formed Soft Ware in 1999, adding former Soft Machine drummer John Marshall and former King Crimson contributor Keith Tippett on keyboards. The group did not release any albums, and by 2002 had changed their name to Soft Works as Tippett left and former guitarist Allan Holdsworth joined. Abracadabra, the band's only studio album, was issued in 2003. Holdsworth left again after the album's release and was replaced in October 2004 by his original replacement in Soft Machine, John Etheridge; at this point, the band renamed themselves Soft Machine Legacy. During the final Soft Works tour, Hopper and Dean also recorded an album with Japanese keyboardist Hoppy Kamiyama and drummer Tatsuya Yoshida under the name Soft Mountain. In 2004, they completed a tour with French keyboardist Sophia Domancich and drummer Simon Goubert under the name Soft Bounds.
The first lineup of Soft Machine Legacy released Live at Zaandam in 2005, followed by a self-titled debut studio album and the live video New Morning: The Paris Concert the following year. On 7 February 2006, however, Dean died following a year of "heart and liver problems". His place in the band was taken by Theo Travis, and in January 2007 the group issued their second studio album Steam. In June 2008, Hopper was diagnosed with leukemia and temporarily replaced on tour by Fred Baker of In Cahoots. He later died of the condition on 7 June 2009. As had happened when Hopper left Soft Machine in 1973, his place was taken by Roy Babbington. In 2010, the band issued the live collection Live Adventures recorded in 2009, which was followed in 2013 by their third studio release Burden of Proof.

### Soft Machine returns

Starting in December 2015, Theo Travis, John Etheridge, Roy Babbington and John Marshall began touring as Soft Machine, dropping "Legacy" from their name. The band released their first official studio album under the original name since 1981 in the form of Hidden Details in September 2018. In December 2020 Fred Baker replaced Babbington. In August 2022, Asaf Sirkis replaced newly retired John Marshall. A new studio album, Other Doors, was released in June 2023. The album was recorded with Marshall before his departure.

## Soft Machine members
### Current members

| Name | Years active | Instruments | Soft Machine release contributions |
| John Etheridge | 1975–197819842015–present | guitars | Softs (1976)Alive & Well: Recorded in Paris (1978)British Tour '75 (2005)Hidden Details (2018)Live at the Baked Potato (2020)Other Doors (2023)"The Dew at Dawn" (2024) |
| Theo Travis | 2015–present | tenor and soprano saxophonesflutekeyboardspiano | Hidden Details (2018)Live at the Baked Potato (2020)Other Doors (2023)"The Dew at Dawn" (2024) |
| Fred Baker | 2020–present | bass | Other Doors (2023)"The Dew at Dawn" (2024) |
| Asaf Sirkis | 2022–present | drums | "The Dew at Dawn" (2024) |

### Former members

| Name | Years active | Instruments | Soft Machine release contributions |
| Mike Ratledge | 1966–1976 (died 2025) | keyboardsorganpianosynthesisersflute | all releases from "Love Makes Sweet Music" (1967) to Softs (1976)all releases from Live at the Proms 1970 (1988) to Switzerland 1974 (2015)Facelift France & Holland (2022)The Dutch Lesson (2023)Høvikodden 1971 (2024) |
| Robert Wyatt | 1966–1971 | drumspercussionlead and backing vocalsoccasional keyboards and bass | all releases from "Love Makes Sweet Music" (1967) to Fourth (1971)Jet Propelled Photographs (1972)Live at the Proms 1970 (1988)BBC in Concert 1971 (1993)all releases from Live at the Paradiso 1969 (1995) to BBC Radio: 1967–1971 (2003)Somewhere in Soho (2004)Breda Reactor (2004)Grides (2006)Middle Earth Masters (2006)Alive in Paris (2008)Facelift France & Holland (2022)Høvikodden 1971 (2024) |
| Kevin Ayers | 1966–1968 (died 2013) | bassguitarsbacking and lead vocals | "Love Makes Sweet Music" (1967)The Soft Machine (1968)Jet Propelled Photographs (1972)Soft Machine Turns On, Volumes 1 and 2 (2001)BBC Radio: 1967–1971 (2003)Middle Earth Masters (2006) |
| Daevid Allen | 1966–1967 (died 2015) | guitarsbassbacking vocals | "Love Makes Sweet Music" (1967)Jet Propelled Photographs (1972)Soft Machine Turns On, Volume 1 (2001) |
| Larry Nowlin | 1966 | guitarsbacking vocals | none – live performances only |
| Andy Summers | 1968 | guitars | none – live performances only |
| Hugh Hopper | 1968–1973 (session guest earlier in 1968) (died 2009) | bassguitarsalto saxophone (1968–69) | all releases from The Soft Machine (1968) (as session musician) to Fifth (1972)Six (1973)all releases from Live at the Proms 1970 (1988) to Noisette (2000) and Backwards (2002) to Breda Reactor (2004)Grides (2006)all releases from Alive in Paris (2008) to Drop (2009)Facelift France & Holland (2022)Høvikodden 1971 (2024) |
| Brian Hopper | 1969 (session guest earlier in 1969) | tenor and soprano saxophones | Volume Two (1969) (as session musician)Spaced (1996)BBC Radio: 1967–1971 (2003) |
| Elton Dean | 1969–1972 (died 2006) | alto saxophonesaxelloflutekeyboards | Third (1970)Fourth (1971)Fifth (1972)Live at the Proms 1970 (1988)BBC in Concert 1971 (1993)Live in France (1995)Virtually (1998)Noisette (2000)Backwards (2002)Facelift (2002)BBC Radio: 1967–1971 (2003)Somewhere in Soho (2004)Breda Reactor (2004)Grides (2006)Alive in Paris (2008)Drop (2009)Facelift France & Holland (2022)Høvikodden 1971 (2024) |
| Lyn Dobson | 1969–1970 | tenor and soprano saxophonesflutebacking vocals | Third (1970)Noisette (2000)Backwards (2002)BBC Radio: 1967–1971 (2003)Breda Reactor (2004)Alive in Paris (2008)Facelift France & Holland (2022) |
| Mark Charig | 1969 (session guests in 1970) | cornettrumpet | Fourth (1971) (as session musician)BBC in Concert 1971 (1993) (as guest)Backwards (2002)BBC Radio: 1967–1971 (2003) |
| Nick Evans | 1969 (session guests in 1970) | trombone | Third (1970) (as session musician)Fourth (1971) (as session musician)Backwards (2002)BBC Radio: 1967–1971 (2003) |
| Phil Howard | 1971–1972 | drums | Fifth (1972)BBC in Concert 1971 (1993) (as guest)BBC Radio: 1971–1974 (2003)Drop (2009) |
| John Marshall | 1972–19781980–198119842015–2022 (died 2023) | drumspercussion | Fifth (1972)all releases from Six (1973) to Land of Cockayne (1981)BBC in Concert 1972 (1994)Live in France (1995)BBC Radio: 1971–1974 (2003)British Tour '75 (2005)Floating World Live (2006)all releases from NDR Jazz Workshop (2010) to Live at The Baked Potato (2020)The Dutch Lesson (2023)Other Doors (2023) |
| Karl Jenkins | 1972–19781980–19811984 | baritone and soprano saxophonesrecorderfluteoboekeyboardspianosynthesisers | all releases from Six (1973) to Land of Cockayne (1981)BBC in Concert 1972 (1994)BBC Radio: 1971–1974 (2003)British Tour '75 (2005)Floating World Live (2006)NDR Jazz Workshop (2010)Switzerland 1974 (2015)The Dutch Lesson (2023) |
| Roy Babbington | 1973–19762015–2020 (session guest 1970–1972 and 2022) | bassdouble bass | Fourth (1971) (as session musician)Fifth (1972) (as session musician)Seven (1973)Bundles (1975)Softs (1976)BBC in Concert 1971 (1993) (as guest)BBC Radio: 1971–1974 (2003)British Tour '75 (2005)Floating World Live (2006)all releases from NDR Jazz Workshop (2010) to Live at the Baked Potato (2020)The Dutch Lesson (2023)Other Doors (2023) (as session musician) |
| Allan Holdsworth | 1973–197519781980–1981 (substitute for Etheridge at one show in 1977) (died 2017) | guitarsvoices | Bundles (1975)Land of Cockayne (1981)BBC Radio: 1971–1974 (2003)Floating World Live (2006)Switzerland 1974 (2015) |
| Alan Wakeman | 1976 | tenor and soprano saxophones | Softs (1976) |
| Ray Warleigh | 19761980–19811984 (session guest in 1974) (died 2015) | alto saxophoneflutebass flute | Bundles (1975) (as session musician)Land of Cockayne (1981) |
| Ric Sanders | 1976–1978 | violin | Alive & Well: Recorded in Paris (1978) |
| Percy Jones | 1976 | bass | none – live performances only |
| Steve Cook | 1976–1978 | bass | Alive & Well: Recorded in Paris (1978) |
| Jack Bruce | 1980–1981 (died 2014) | bass | Land Of Cockayne (1981) |
| Dick Morrissey | 1980–1981 (both died 2000) | tenor saxophone | Land Of Cockayne (1981) |
| Stu Calver | 1980–1981 (both died 2000) | vocals | Land Of Cockayne (1981) |
| John Perry | 1980–1981 | vocals | Land Of Cockayne (1981) |
| Tony Rivers | 1980–1981 | vocals | Land Of Cockayne (1981) |
| Alan Parker | 1980–1981 | rhythm guitar | Land Of Cockayne (1981) |
| John Taylor | 1980–1981 (died 2015) | electric piano | Land Of Cockayne (1981) |
| Paul Carmichael | 1984 | bass | none – live performances only |
| Dave MacRae | 1984 | keyboardspiano | none – live performances only |

## Other Soft Machine musicians
### Touring substitutes

| Image | Name | Years active | Instruments | Details |
| | Nic France | 20172022 | drums | In 2017 and 2022, France filled in for John Marshall at a few shows, after the regular drummer injured his back. |
| | Gary Husband | 2018 | drums | Husband substituted for Marshall on drums for a few gigs in 2018 |

### Session musicians

| Name | Years active | Instruments | Release contributions |
| The Cake | 1968 | backing vocals | The Soft Machine (1968) |
| Rab Spall | 1970 | violin | Third (1970) |
| Jimmy Hastings | 1970 | flutesbass clarinet | Third (1970)Fourth (1971) |
| Alan Skidmore | 1970 | tenor saxophone | Fourth (1971) |
| Nick Utteridge | 2017 | wind chimes | Hidden Details (2018) |

## Spin-off band members

| Name | Years active | Instruments | Release contributions |
| Elton Dean | 1978–19881999–2006 (until his death) | alto saxophonesaxellopiano | all Soft Machine spin-off band releases from Rogue Element (1978) to New Morning: The Paris Concert (2006) |
| Pip Pyle | 1978–1988 (died 2006) | drumselectronic drums | Soft Heap (1979)A Veritable Centaur (1995)Al Dente (2008) |
| Alan Gowen | 1978–1981 (until his death) | keyboardssynthesisers | Rogue Element (1978)Soft Heap (1979)Al Dente (2008) |
| Hugh Hopper | 1978–19791999–2009 (touring hiatus from 2008–2009; his death) | bass | all Soft Machine spin-off band releases from Rogue Element (1978) to Al Dente (2008), except A Veritable Centaur (1995) |
| Dave Sheen | 1978 (touring) | drums | Rogue Element (1978) |
| John Greaves | 1979–1988 | bassvocalskeyboards | A Veritable Centaur (1995) |
| Mark Hewins | 1981–1988 | guitarvocals | A Veritable Centaur (1995) |
| John Marshall | 1999–2015 (died 2023) | drumspercussion | all Soft Works and Soft Machine Legacy releases |
| Keith Tippett | 1999–2002 (touring 2015) (died 2020) | keyboardssynthesisers | none – live performances only |
| Allan Holdsworth | 2002–2004 | guitarsSynthAxe | Abracadabra (2003) |
| Hoppy Kamiyama | 2003 (Soft Mountain) | keyboards | Soft Mountain (2007) |
| Tatsuya Yoshida | 2003 (Soft Mountain) | drums | Soft Mountain (2007) |
| Sophia Domancich | 2003–2004 (Soft Bounds) | keyboardspiano | Live at Le Triton 2004 (2005) |
| Simon Goubert | 2003–2004 (Soft Bounds) | drums | Live at Le Triton 2004 (2005) |
| John Etheridge | 2004–2015 | guitars | all Soft Machine Legacy releases |
| Theo Travis | 2006–2015 | tenor and soprano saxophonesflutekeyboardspiano | Steam (2007)Live Adventures (2010)Burden of Proof (2013) |
| Fred Baker | 2008–2009 (touring) | bass | none |
| Roy Babbington | 2009–2015 | bass | Live Adventures (2010)Burden of Proof (2013) |

## Other spin-off band musicians
### Touring substitutes

| Name | Years active | Instruments | Details |
| Liam Genockey | 2004–2005 | drums | Genockey and Fletcher substituted for the injured John Marshall at shows in October 2004 and summer 2005. |
| Mark Fletcher | 2005 | drums | Genockey and Fletcher substituted for the injured John Marshall at shows in October 2004 and summer 2005. |
| Nic France | 2015 | drums | During 2015, France and Husband filled in for John Marshall for several shows, after the regular drummer injured his back. |
| Gary Husband | 2015 | drums | During 2015, France and Husband filled in for John Marshall for several shows, after the regular drummer injured his back. |

### Session musicians

| Image | Name | Years active | Instruments | Release contributions |
| | Alain Eckert | 1982–1983 | guitar synthesizer | A Veritable Centaur (1995) |

## Soft Machine lineups

| Period | Members | Releases |
| August – September 1966 | Mike Ratledge – keyboards, piano, flute Robert Wyatt – drums, percussion, vocals Kevin Ayers – bass, vocals, guitar Daevid Allen – guitar, backing vocals, bass Larry Nowlin – guitar, backing vocals | none |
| September 1966 – August 1967 | Mike Ratledge – keyboards, piano, flute Robert Wyatt – drums, percussion, vocals Kevin Ayers – bass, vocals, guitar Daevid Allen – guitar, backing vocals, bass | "Love Makes Sweet Music" (1967) Jet Propelled Photographs (1972) Soft Machine Turns On, Volume 1 (2001) – four tracks |
| August 1967 – May 1968 | Mike Ratledge – keyboards, piano, flute Robert Wyatt – drums, percussion, vocals Kevin Ayers – bass, guitar, vocals | The Soft Machine (1968) Soft Machine Turns On, Volume 1 (2001) – eleven tracks Soft Machine Turns On, Volume 2 (2001) – six tracks BBC Radio: 1967–1971 (2003) – five tracks Middle Earth Masters (2006) |
| May – July 1968 | Mike Ratledge – keyboards, piano, flute Robert Wyatt – drums, percussion, vocals Kevin Ayers – bass, vocals, guitar Andy Summers – guitar | none |
| July – September 1968 | Mike Ratledge – keyboards, piano, flute Robert Wyatt – drums, percussion, vocals Kevin Ayers – bass, guitar, vocals | Soft Machine Turns On, Volume 2 (2001) – eight tracks |
| December 1968 – May 1969 | Mike Ratledge – keyboards, piano, flute Robert Wyatt – drums, percussion, vocals Hugh Hopper – bass, guitar, saxophone | Volume Two (1969) Live at the Paradiso 1969 (1995) |
| May – October 1969 | Mike Ratledge – keyboards, piano Robert Wyatt – drums, percussion, vocals Hugh Hopper – bass Brian Hopper – saxophone | The Peel Sessions (1990) – two tracks Spaced (1996) BBC Radio: 1967–1971 (2003) – two tracks |
| October – December 1969 | Mike Ratledge – keyboards, piano Robert Wyatt – drums, percussion, vocals Hugh Hopper – bass Elton Dean – saxophone, saxello, keyboards Lyn Dobson – saxophone, flute Mark Charig – cornet, trumpet Nick Evans – trombone | The Peel Sessions (1990) – two tracks Backwards (2002) – two tracks BBC Radio: 1967–1971 (2003) – one track |
| December 1969 – March 1970 | Mike Ratledge – keyboards, piano Robert Wyatt – drums, percussion, vocals Hugh Hopper – bass Elton Dean – saxophone, saxello, keyboards Lyn Dobson – saxophone, flute | Third (1970) – one track Noisette (2000) Breda Reactor (2004) Alive in Paris 1970 (2008) Facelift France & Holland (2022) |
| March 1970 – August 1971 | Mike Ratledge – keyboards, piano Robert Wyatt – drums, percussion, vocals Hugh Hopper – bass Elton Dean – saxophone, saxello, keyboards | Third (1970) – three tracks Fourth (1971) Live at the Proms 1970 (1988) The Peel Sessions (1990) – four tracks BBC in Concert 1971 (1993) Virtually (1998) Backwards (2002) – three tracks Facelift (2002) BBC Radio: 1967–1971 (2003) – five tracks Somewhere in Soho (2004) Grides (2006) Live at Henie Onstad Art Centre 1971 (2009) Høvikodden 1971 (2024) |
| August 1971 – January 1972 | Mike Ratledge – keyboards, piano Hugh Hopper – bass Elton Dean – saxophone, saxello, keyboards Phil Howard – drums | Fifth (1972) – three tracks The Peel Sessions (1990) – two tracks BBC Radio: 1971–1974 (2003) – three tracks Drop (2009) |
| January – May 1972 | Mike Ratledge – keyboards, piano Hugh Hopper – bass Elton Dean – saxophone, saxello, keyboards John Marshall – drums, percussion | Fifth (1972) – four tracks Live in France (1995) |
| May 1972 – May 1973 | Mike Ratledge – keyboards, piano Hugh Hopper – bass John Marshall – drums, percussion Karl Jenkins – saxophone, keyboards | Six (1973) BBC in Concert 1972 (1994) BBC Radio: 1971–1974 (2003) – one track |
| May – November 1973 | Mike Ratledge – keyboards, synthesisers John Marshall – drums, percussion Karl Jenkins – saxophone, keyboards Roy Babbington – bass, double bass | Seven (1973) BBC Radio: 1971–1974 (2003) – four tracks NDR Jazz Workshop (2010) The Dutch Lesson (2023) |
| November 1973 – April 1975 | Mike Ratledge – keyboards, synthesisers John Marshall – drums, percussion Karl Jenkins – saxophone, keyboards Roy Babbington – bass Allan Holdsworth – guitar | Bundles (1975) BBC Radio: 1971–1974 (2003) – three tracks Floating World Live (2006) Switzerland 1974 (2015) |
| April 1975 – January 1976 | Mike Ratledge – keyboards, synthesisers John Marshall – drums, percussion Karl Jenkins – saxophone, keyboards Roy Babbington – bass John Etheridge – guitar | British Tour '75 (2005) |
| January – March 1976 | Mike Ratledge – keyboards, synthesisers John Marshall – drums, percussion Karl Jenkins – keyboards, synthesisers Roy Babbington – bass John Etheridge – guitar Alan Wakeman – saxophone | Softs (1976) – two tracks |
| March – June 1976 | John Marshall – drums, percussion Karl Jenkins – keyboards, synthesisers Roy Babbington – bass John Etheridge – guitar Alan Wakeman – saxophone | Softs (1976) – nine tracks Rubber Riff (1976) – Karl Jenkins solo album recorded during this period (with Marshall, Babbington and Etheridge guesting), re-released in 1994 under Soft Machine name |
| June – September 1976 | John Marshall – drums, percussion Karl Jenkins – keyboards, synthesisers Roy Babbington – bass John Etheridge – guitar Ray Warleigh – saxophone, flute | none |
| September – November 1976 | John Marshall – drums, percussion Karl Jenkins – keyboards, synthesisers John Etheridge – guitar Ric Sanders – violin Percy Jones – bass | none |
| November 1976 – March 1978 | John Marshall – drums, percussion Karl Jenkins – keyboards, synthesisers John Etheridge – guitar Ric Sanders – violin Steve Cook – bass | Alive & Well: Recorded in Paris (1978) |
| December 1978 | John Marshall – drums, percussion Karl Jenkins – keyboards, synthesisers Steve Cook – bass Allan Holdsworth – guitar | none |
| Band inactive January 1979 – May 1980 |||
| June 1980 – March 1981 | John Marshall – drums, percussion Karl Jenkins – keyboards, synthesisers Allan Holdsworth – guitar Ray Warleigh – saxophone, flute Jack Bruce – bass Stu Calver – vocals Dick Morrissey – saxophone Alan Parker – guitar John Perry – vocals Tony Rivers – vocals John Taylor – piano | Land of Cockayne (1981) |
| Band inactive April 1981 – June 1984 |||
| July – August 1984 | John Marshall – drums, percussion Karl Jenkins – keyboards, synthesisers Ray Warleigh – saxophone, flute John Etheridge – guitar Paul Carmichael – bass Dave MacRae – keyboards, piano | none |
| Band inactive September 1984 – November 2015 |||
| December 2015 – December 2020 | John Marshall – drums, percussion John Etheridge – guitar Roy Babbington – bass Theo Travis – saxophone, flute, keyboards | Hidden Details (2018) Live at the Baked Potato (2020) |
| December 2020 – August 2022 | John Marshall – drums, percussion John Etheridge – guitar Theo Travis – saxophone, flute, keyboards Fred Baker – bass | Other Doors (2023) |
| August 2022 – present | John Etheridge – guitar Theo Travis – saxophone, flute, keyboards Fred Baker – bass Asaf Sirkis – drums | "The Dew at Dawn" (2024) |

## Spin-off band lineups

| Period | Members | Releases |
| Soft Heap (1978–1979) | Elton Dean – saxophone, saxello Hugh Hopper – bass Alan Gowen – keyboards, synthesisers Pip Pyle – drums | Soft Heap (1979) Al Dente (2008) |
| Soft Head (April – August 1978) | Elton Dean – saxophone, saxello Hugh Hopper – bass Alan Gowen – keyboards, synthesisers Dave Sheen – drums | Rogue Element (1978) |
| Soft Heap (1979–1981) | John Greaves – bass, vocals Elton Dean – saxophone, saxello Alan Gowen – keyboards, synthesisers Pip Pyle – drums | none |
| Soft Heap (1981–1988) | John Greaves – bass, keyboards, vocals Mark Hewins – guitar, vocals Elton Dean – saxophone, saxello Pip Pyle – drums | A Veritable Centaur (1995) |
| Spin-off bands inactive 1988–1999 |||
| Soft Ware (September 1999 – June 2002) | Elton Dean – saxophone, saxello, keyboards Hugh Hopper – bass Keith Tippett – keyboards, synthesisers John Marshall – drums | none |
| Soft Works (June 2002 – October 2004) | Elton Dean – saxophone, saxello, keyboards Allan Holdsworth – guitar, synthesisers Hugh Hopper – bass John Marshall – drums, percussion | Abracadabra (2003) |
| Soft Mountain (August 2003) | Elton Dean – saxophone, saxello Hugh Hopper – bass Hoppy Kamiyama – keyboards Tatsuya Yoshida – drums | Soft Mountain (2007) |
| Soft Bounds (2003–2004) | Elton Dean – saxophone, saxello Hugh Hopper – bass Sophia Domancich – keyboards, piano Simon Goubert – drums | Live at Le Triton 2004 (2005) |
| Soft Machine Legacy (October 2004 – February 2006) | Elton Dean – saxophone, saxello, keyboards John Etheridge – guitar Hugh Hopper – bass John Marshall – drums, percussion | Live in Zaandam (2005) Soft Machine Legacy (2006) New Morning: The Paris Concert (2006) |
| Soft Machine Legacy (March 2006 – June 2009) | Theo Travis – saxophone, flute, keyboards John Etheridge – guitar Hugh Hopper – bass John Marshall – drums, percussion | Steam (2007) |
| Soft Machine Legacy (July 2009 – December 2015) | Theo Travis – saxophone, flute, keyboards John Etheridge – guitar Roy Babbington – bass John Marshall – drums, percussion | Live Adventures (2010) Burden of Proof (2013) |