Alesis Quadrasynth Plus - Revision history

MelonadeM at 16:34, 13 October 2025

2025-10-13T16:34:00Z

← Older revision		Revision as of 16:34, 13 October 2025
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	\| effects = Variable, see [[#Effects\|effects]].		\| effects = Variable, see [[#Effects\|effects]].
	\| expansion = 1 × [[Alesis PCMCIA]]		\| expansion = 1 × [[Alesis PCMCIA]]
			\| battery = 3-volt BR2325
			\| power = IEC 3-pin {{IEC 3-pin Icon}} (keyboard)<br>Region-specific<br><br>Alesis 4-pin 9V AC (module)<br>Any region
	\| predecessor = [[Alesis Quadrasynth]]		\| predecessor = [[Alesis Quadrasynth]]
	\| successor = [[Alesis QS6]], [[Alesis QS7]], [[Alesis QS8]]		\| successor = [[Alesis QS6]], [[Alesis QS7]], [[Alesis QS8]]

MelonadeM at 01:44, 4 July 2025

2025-07-04T01:44:59Z

← Older revision		Revision as of 01:44, 4 July 2025
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	{\| class="mw-collapsible mw-collapsed wikitable"		{\| class="mw-collapsible mw-collapsed wikitable"
	\|+ style=white-space:nowrap \| Alesis new waveform group list ~~(WARNING: Long)~~		\|+ style=white-space:nowrap \| Notice: This is a long list, and as such has been hidden by default.<br>Alesis Quadrasynth Plus - new waveform group list
	\|-		\|-
	! Group		! Group

MelonadeM at 17:25, 28 September 2024

2024-09-28T17:25:15Z

← Older revision		Revision as of 17:25, 28 September 2024
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	\| expansion = 1 × [[Alesis PCMCIA]]		\| expansion = 1 × [[Alesis PCMCIA]]
	\| predecessor = [[Alesis Quadrasynth]]		\| predecessor = [[Alesis Quadrasynth]]
	\| successor = [[Alesis QS6]]		\| successor = [[Alesis QS6]], [[Alesis QS7]], [[Alesis QS8]]
	}}		}}

MelonadeM: quaodrak,,,,,,,,,,,,,,,,,,,,, plyusPIANO

2024-09-28T17:20:36Z

quaodrak,,,,,,,,,,,,,,,,,,,,, plyusPIANO

← Older revision		Revision as of 17:20, 28 September 2024
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	\| maxpoly = 64		\| maxpoly = 64
	\| numparts = 16		\| numparts = 16
	\| numpresets = '''Programs:'''<br>512 factory, 128 user~~<br>~~<br>'''Mixes:'''<br>400 factory, 100 user		\| numpresets = '''Programs:'''<br>512 factory, 128 user<br>'''Mixes:'''<br>400 factory, 100 user
	\| effects = Variable, see [[#Effects\|effects]].		\| effects = Variable, see [[#Effects\|effects]].
	\| expansion = 1 × [[Alesis PCMCIA]]		\| expansion = 1 × [[Alesis PCMCIA]]
Line 20:		Line 20:
	The '''Quadrasynth Plus''' refers to an upgrade to the [[Alesis Quadrasynth]] released by Alesis in 1995. This documents both the '''Quadrasynth Plus Piano''' as well as the '''Quadrasynth S4 Plus'''.		The '''Quadrasynth Plus''' refers to an upgrade to the [[Alesis Quadrasynth]] released by Alesis in 1995. This documents both the '''Quadrasynth Plus Piano''' as well as the '''Quadrasynth S4 Plus'''.

	Many of the elements from the prior synth remain intact, but the v2.0 upgrade adds a lot of new things, such as an entirely new [[General MIDI]] mode, three extra banks of non-editable preset sounds (one of which is a GM-compatible map), adds either ~~4Mb~~ or ~~8Mb~~ worth of new waveforms depending on if you're using the module or keyboard respectively, mostly located in their own wave groups<ref>Alesis Quadrasynth Plus manual, page 37 - "Overview - Chapter 4".</ref>, expands the effects section to include higher fidelity effects, as well as a new "overdrive" algorithm, new LFO shapes, the ability to change banks via the use of CC#0 (Bank MSB/Bank coarse), support for panning, and more.<ref>Alesis Quadrasynth S4 Plus manual, pages 135 onwards - "WHAT’S NEW IN THE 2.0 "PLUS" UPGRADE"</ref>		Many of the elements from the prior synth remain intact, but the v2.0 upgrade adds a lot of new things, such as an entirely new [[General MIDI]] mode, three extra banks of non-editable preset sounds (one of which is a GM-compatible map), adds either 4MB or 8MB worth of new waveforms depending on if you're using the module or keyboard respectively, mostly located in their own wave groups<ref>Alesis Quadrasynth Plus manual, page 37 - "Overview - Chapter 4".</ref>, expands the effects section to include higher fidelity effects, as well as a new "overdrive" algorithm, new LFO shapes, the ability to change banks via the use of CC#0 (Bank MSB/Bank coarse), support for panning, and more.<ref>Alesis Quadrasynth S4 Plus manual, pages 135 onwards - "WHAT’S NEW IN THE 2.0 "PLUS" UPGRADE"</ref>

	The demo tracks have been replaced as well, three new tracks and a shorter version of Bach's Bad Dream is available, albeit it seems to set the pitch bend ranges for the square lead errorenously. It is unknown if these new tracks have any names or who composed them at this time however it is likely the same person who sequenced the original two demo tracks, Stephen Kay.		The demo tracks have been replaced as well, three new tracks and a shorter version of Bach's Bad Dream is available, albeit it seems to set the pitch bend ranges for the square lead errorenously. It is unknown if these new tracks have any names or who composed them at this time however it is likely the same person who sequenced the original two demo tracks, Stephen Kay.

	== Effects ==		== Effects ==
			The Plus models take the effect configuration from the previous models, and upgrade the DSP to support higher quality effects, such as better algorithms. Most prominently this can be heard with the "Lezlie" effect, which is now in stereo rather than in mono.

	==== Configuration #1 to #4 ====		==== Configuration #1 to #4 ====
	Effects from the previous iteration are still present, however Configuration #1 and #3 have been changed to lock the third pitch unit into a permanent "resonant" mode, made as a concession for higher quality ~~sounds~~.<ref name="qsplus-effect-change">Alesis Quadrasynth S4 Plus manual, page 145 - "Effect Configurations 1 and 3, Send 3 Pitch"</ref>. Please see [[Alesis Quadrasynth#Effects\|the previous effect listing]] for more information about the first four configurations.		Effects from the previous iteration are still present, however Configuration #1 and #3 have been changed to lock the third pitch unit into a permanent "resonant" mode, made as a concession for higher quality effects.<ref name="qsplus-effect-change">Alesis Quadrasynth S4 Plus manual, page 145 - "Effect Configurations 1 and 3, Send 3 Pitch"</ref>. Please see [[Alesis Quadrasynth#Effects\|the previous effect listing]] for more information about the first four configurations.

	==== Configuration #5 - Overdrive > Chorus > Delay > Reverb > Leslie ====		==== Configuration #5 - Overdrive > Chorus > Delay > Reverb > Leslie ====
Line 33:		Line 34:

	== Added waveforms ==		== Added waveforms ==
	The Plus models add an additional 8 ~~megabit~~ (Plus Piano) or 4 ~~megabit~~ (S4 Plus) of waveform data. Below is a table of all the new waveforms found on the S4 Plus.<ref>Alesis Quadrasynth S4 Plus manual, page 137 - "What's New in the 2.0 "Plus" Upgrade: Appendix D".</ref>		The Plus models add an additional 8 MB (Plus Piano) or 4 MB (S4 Plus) of waveform data. Below is a table of all the new waveforms found on the S4 Plus.<ref>Alesis Quadrasynth S4 Plus manual, page 137 - "What's New in the 2.0 "Plus" Upgrade: Appendix D".</ref>

	Groups denoted with an asterisk are new to the S4 Plus~~. Most~~ of the new waveforms are either constructed from already existing ROM data (such as the "Rhythm" group), or has been specially designed for General MIDI compatibility.		Groups denoted with an asterisk are new to the Plus models. On the S4 Plus, most of the new waveforms are either constructed from already existing ROM data (such as the "Rhythm" group), or has been specially designed for General MIDI compatibility.

	{\| class="wikitable"		{\| class="mw-collapsible mw-collapsed wikitable"
			\|+ style=white-space:nowrap \| Alesis new waveform group list (WARNING: Long)
	\|-		\|-
	! Group		! Group
	! ~~New Voices~~		! S4 Plus - new voices
			! Quadrasynth Plus Piano - new voices
	\|-		\|-
	\| ~~Piano~~		! Piano
			\| AcousPiano, BritePiano, PianoModul
	\| AcousPiano, BritePiano, PianoModul		\| AcousPiano, BritePiano, PianoModul
	\|-		\|-
	\| ~~Guitar~~		! Guitar
			\| AcoustHrm2, NylonHrm2, 6 Str Hrm2
	\| AcoustHrm2, NylonHrm2, 6 Str Hrm2		\| AcoustHrm2, NylonHrm2, 6 Str Hrm2
	\|-		\|-
	\| ~~SndFX~~		! SndFX
			\| Alert, Android, Cyborg, Meteor, Supernova
	\| Alert, Android, Cyborg, Meteor, Supernova		\| Alert, Android, Cyborg, Meteor, Supernova
	\|-		\|-
	\| ~~Drums~~		! Drums
			\| Analog Kit, Brush Kit, Tribal Kit
	\| Analog Kit, Brush Kit, Tribal Kit		\| Analog Kit, Brush Kit, Tribal Kit
	\|-		\|-
	\| Rhythm*		! Rhythm*
			\| PsiBeat 1, PsiBeat 2, PsiBeat 3, PsiBeat 4, PsiBeat 5, Kick Loop1, Kick Loop2, Kick Loop3, Kick Loop4, Kick Loop5, SnareLoop1, SnareLoop2, SnareLoop3, Backbeat, ClsdHHLoop, OpenHHLoop1, OpenHHLoop2, FootHHLoop, Ride Loop1, Ride Loop2, Ride Loop3, Tick Talk, Swingset, Bongo Loop, BlockLoop1, BlockLoop2, BlockLoop3, HiTriLpHd, HiTriLpSf, LoTriLpHd, LoTriLpSf, Tamb Loop1, Tamb Loop2, ShakerLoop, ShuflShakr, PopperLoop, BottleLoop, Motor, MiniNoizLp, HvyMetalLp, Machine Lp, Kah Loop, Bass Loop, SynBass Lp
	\| PsiBeat 1, PsiBeat 2, PsiBeat 3, PsiBeat 4, PsiBeat 5, Kick Loop1, Kick Loop2, Kick Loop3, Kick Loop4, Kick Loop5, SnareLoop1, SnareLoop2, SnareLoop3, Backbeat, ClsdHHLoop, OpenHHLoop1, OpenHHLoop2, FootHHLoop, Ride Loop1, Ride Loop2, Ride Loop3, Tick Talk, Swingset, Bongo Loop, BlockLoop1, BlockLoop2, BlockLoop3, HiTriLpHd, HiTriLpSf, LoTriLpHd, LoTriLpSf, Tamb Loop1, Tamb Loop2, ShakerLoop, ShuflShakr, PopperLoop, BottleLoop, Motor, MiniNoizLp, HvyMetalLp, Machine Lp, Kah Loop, Bass Loop, SynBass Lp		\| PsiBeat 1, PsiBeat 2, PsiBeat 3, PsiBeat 4, PsiBeat 5, Kick Loop1, Kick Loop2, Kick Loop3, Kick Loop4, Kick Loop5, SnareLoop1, SnareLoop2, SnareLoop3, Backbeat, ClsdHHLoop, OpenHHLoop1, OpenHHLoop2, FootHHLoop, Ride Loop1, Ride Loop2, Ride Loop3, Tick Talk, Swingset, Bongo Loop, BlockLoop1, BlockLoop2, BlockLoop3, HiTriLpHd, HiTriLpSf, LoTriLpHd, LoTriLpSf, Tamb Loop1, Tamb Loop2, ShakerLoop, ShuflShakr, PopperLoop, BottleLoop, Motor, MiniNoizLp, HvyMetalLp, Machine Lp, Kah Loop, Bass Loop, SynBass Lp
	\|-		\|-
	\| S4Plus*		! S4Plus*
	\| GrandPiano, Dark Piano, BritePiano, PianoModul, NoHamrGrnd, NoHamrBrit, VelAttkPno, VeloPiano1, VeloPiano2, PianoKnock, BrtRdsWave, DrkRdsWave, SftRdsWave, Wurlser, Wurlser V1, Wurlser V2, WurlserWav, FM Tines, Soft Tines, VelAtkTine, Vel FM Pno, Clavinet, HarpsiWave, Xylophone, Marimba Hd, Marimba Sf, MarimbaVel, Vibes, Ice Block, Brake Drum, FMTblrBell, FMTub/Null, TubulrWave, TubWv/Null, Rock Organ, Perc Organ, 16'Drawbar, 5 1/3' bar, 8' Drawbar, 4' Drawbar, 2 2/3' bar, 2' Drawbar, 1 3/5' bar, 1 1/3' bar, 1' Drawbar, Percus Wav, HollowWave, ChurchOrgn, Principale, Positive, Dulcimer, Nylon Gtr, FunkyStrat, MuteGuitar, OvrDrvGtr, FretlessBs, Orch. Hit, Bottle Blow, Sitar, Shamisen, Koto, Kalimba, Bagpipe, Taiko Drum, Fret Noise, Bird Tweet, Telephone, Applause, Gunshot		\| GrandPiano, Dark Piano, BritePiano, PianoModul, NoHamrGrnd, NoHamrBrit, VelAttkPno, VeloPiano1, VeloPiano2, PianoKnock, BrtRdsWave, DrkRdsWave, SftRdsWave, Wurlser, Wurlser V1, Wurlser V2, WurlserWav, FM Tines, Soft Tines, VelAtkTine, Vel FM Pno, Clavinet, HarpsiWave, Xylophone, Marimba Hd, Marimba Sf, MarimbaVel, Vibes, Ice Block, Brake Drum, FMTblrBell, FMTub/Null, TubulrWave, TubWv/Null, Rock Organ, Perc Organ, 16'Drawbar, 5 1/3' bar, 8' Drawbar, 4' Drawbar, 2 2/3' bar, 2' Drawbar, 1 3/5' bar, 1 1/3' bar, 1' Drawbar, Percus Wav, HollowWave, ChurchOrgn, Principale, Positive, Dulcimer, Nylon Gtr, FunkyStrat, MuteGuitar, OvrDrvGtr, FretlessBs, Orch. Hit, Bottle Blow, Sitar, Shamisen, Koto, Kalimba, Bagpipe, Taiko Drum, Fret Noise, Bird Tweet, Telephone, Applause, Gunshot
			\| −
			\|-
			! QSPlus*
			\| −
			\| Piano L, Piano R, BritePno1L, BritePno1R, DarkPno1 L, DarkPno1 R, PnoKnock L, PnoKnock R, Piano Trem, El.Piano1, El.Piano2, Drawbars, Perc.Organ, Pipe Organ, Clavinet, Varimba, Fretless, BritePno2L, BritePno2R, DarkPno2 L, DarkPno2 R, BritePno3L, BritePno3R, DarkPno3 L, DarkPno3 R, TapPiano L, TapPiano R, El.Spinet1, El.Spinet2, Toy Pno L, Toy Pno R, KeyTrack1, KeyTrack2, Stretch L, Stretch R, Analog Pad
	\|}		\|}

Line 65:		Line 78:

	== Alesis Quadrasynth S4 Plus ==		== Alesis Quadrasynth S4 Plus ==
	~~<!--[[File:Alesis-s4-plus-vector.jpg\|315px\|thumb\|right\|Illustration of the Alesis S4 Plus, based on a version found in the manual with added colour.]]-->~~Released in 1996, this is a rackmount version of the Quadrasynth Plus Piano, except it omits the extra piano sounds, for a total of ~~20 megabits~~ of sample ROM. Software-wise, it is identical in all other respects. The QSPlus bank ~~has been~~ renamed to S4Plus.		Released in 1996, this is a rackmount version of the Quadrasynth Plus Piano, except it omits the extra piano sounds, for a total of 20MB of sample ROM. Software-wise, it is identical in all other respects. The QSPlus bank is absent from this model, being renamed to "S4Plus" and adding many waveforms tailored for better General MIDI compatibility.

	The rackmount body itself features a few changes: "EXPANDED ROM - GENERAL MIDI" text can be found below the 8 buttons on the left, a bracket below the PAGE pair of buttons indicate that these can also increment or decrement a value by 10, the VALUE pair of buttons have a similar bracket, but for incrementing or decrementing by 1, and the logo has a fancy "Plus" handwritten on top of the logo.		The rackmount body itself features a few changes: "EXPANDED ROM - GENERAL MIDI" text can be found below the 8 buttons on the left, a bracket below the PAGE pair of buttons indicate that these can also increment or decrement a value by 10, the VALUE pair of buttons have a similar bracket, but for incrementing or decrementing by 1, and the logo has a fancy "Plus" handwritten on top of the logo.

MelonadeM at 12:04, 28 September 2024

2024-09-28T12:04:15Z

← Older revision		Revision as of 12:04, 28 September 2024
Line 13:		Line 13:
	\| numpresets = '''Programs:'''<br>512 factory, 128 user<br><br>'''Mixes:'''<br>400 factory, 100 user		\| numpresets = '''Programs:'''<br>512 factory, 128 user<br><br>'''Mixes:'''<br>400 factory, 100 user
	\| effects = Variable, see [[#Effects\|effects]].		\| effects = Variable, see [[#Effects\|effects]].
			\| expansion = 1 × [[Alesis PCMCIA]]
	\| predecessor = [[Alesis Quadrasynth]]		\| predecessor = [[Alesis Quadrasynth]]
	\| successor = [[Alesis QS6]]		\| successor = [[Alesis QS6]]

MelonadeM at 10:59, 28 September 2024

2024-09-28T10:59:42Z

@@ Line 30: / Line 30: @@
 ==== Configuration #5 - Overdrive > Chorus > Delay > Reverb > Leslie ====
 FX sends are available, but only FX1 gets access to the overdrive module, which is introduced with this upgrade. All the modules here are fully editable, and with exception to Overdrive can all be routed to any effect send (but not multiple). Terminates with an equalizer module.
 == Alesis Quadrasynth Plus Piano ==

MelonadeM: added s4 plus picture, commented out illustration

2024-09-27T15:49:27Z

added s4 plus picture, commented out illustration

← Older revision		Revision as of 15:49, 27 September 2024
Line 1:		Line 1:
	{{Infobox module		{{Infobox module
	\| name = Alesis Quadrasynth		\| name = Alesis Quadrasynth
	\| image = {{Photo wanted}}<br>'''Alesis Quadrasynth + piano keyboard'''<br><br>~~{{Photo wanted}}~~<br>'''Alesis Quadrasynth S4+ Module'''		\| image = {{Photo wanted}}<br>'''Alesis Quadrasynth + piano keyboard'''<br><br>[[File:S4plus-front.jpg\|320px]]<br>'''Alesis Quadrasynth S4+ Module'''
	\| dimensions = 1220 × 115 × 355 (keyboard)<br>482 × 43 × 150 (module)		\| dimensions = 1220 × 115 × 355 (keyboard)<br>482 × 43 × 150 (module)
	\| keyboard = 76 keys		\| keyboard = 76 keys
Line 35:		Line 35:

	== Alesis Quadrasynth S4 Plus ==		== Alesis Quadrasynth S4 Plus ==
	[[File:Alesis-s4-plus-vector.jpg\|315px\|thumb\|right\|Illustration of the Alesis S4 Plus, based on a version found in the manual with added colour.]] Released in 1996, this is a rackmount version of the Quadrasynth Plus Piano, except it omits the extra piano sounds, for a total of 20 megabits of sample ROM. Software-wise, it is identical in all other respects. The QSPlus bank has been renamed to S4Plus.		<!--[[File:Alesis-s4-plus-vector.jpg\|315px\|thumb\|right\|Illustration of the Alesis S4 Plus, based on a version found in the manual with added colour.]]-->Released in 1996, this is a rackmount version of the Quadrasynth Plus Piano, except it omits the extra piano sounds, for a total of 20 megabits of sample ROM. Software-wise, it is identical in all other respects. The QSPlus bank has been renamed to S4Plus.

	The rackmount body itself features a few changes: "EXPANDED ROM - GENERAL MIDI" text can be found below the 8 buttons on the left, a bracket below the PAGE pair of buttons indicate that these can also increment or decrement a value by 10, the VALUE pair of buttons have a similar bracket, but for incrementing or decrementing by 1, and the logo has a fancy "Plus" handwritten on top of the logo.		The rackmount body itself features a few changes: "EXPANDED ROM - GENERAL MIDI" text can be found below the 8 buttons on the left, a bracket below the PAGE pair of buttons indicate that these can also increment or decrement a value by 10, the VALUE pair of buttons have a similar bracket, but for incrementing or decrementing by 1, and the logo has a fancy "Plus" handwritten on top of the logo.

MelonadeM at 21:26, 24 September 2024

2024-09-24T21:26:30Z

← Older revision		Revision as of 21:26, 24 September 2024
Line 17:		Line 17:
	}}		}}

	The '''Quadrasynth Plus''' refers to an upgrade to the [[Quadrasynth]] released by Alesis in 1995. This documents both the '''Quadrasynth Plus Piano''' as well as the '''Quadrasynth S4 Plus'''.		The '''Quadrasynth Plus''' refers to an upgrade to the [[Alesis Quadrasynth]] released by Alesis in 1995. This documents both the '''Quadrasynth Plus Piano''' as well as the '''Quadrasynth S4 Plus'''.

	Many of the elements from the prior synth remain intact, but the v2.0 upgrade adds a lot of new things, such as an entirely new [[General MIDI]] mode, three extra banks of non-editable preset sounds (one of which is a GM-compatible map), adds either 4Mb or 8Mb worth of new waveforms depending on if you're using the module or keyboard respectively, mostly located in their own wave groups<ref>Alesis Quadrasynth Plus manual, page 37 - "Overview - Chapter 4".</ref>, expands the effects section to include higher fidelity effects, as well as a new "overdrive" algorithm, new LFO shapes, the ability to change banks via the use of CC#0 (Bank MSB/Bank coarse), support for panning, and more.<ref>Alesis Quadrasynth S4 Plus manual, pages 135 onwards - "WHAT’S NEW IN THE 2.0 "PLUS" UPGRADE"</ref>		Many of the elements from the prior synth remain intact, but the v2.0 upgrade adds a lot of new things, such as an entirely new [[General MIDI]] mode, three extra banks of non-editable preset sounds (one of which is a GM-compatible map), adds either 4Mb or 8Mb worth of new waveforms depending on if you're using the module or keyboard respectively, mostly located in their own wave groups<ref>Alesis Quadrasynth Plus manual, page 37 - "Overview - Chapter 4".</ref>, expands the effects section to include higher fidelity effects, as well as a new "overdrive" algorithm, new LFO shapes, the ability to change banks via the use of CC#0 (Bank MSB/Bank coarse), support for panning, and more.<ref>Alesis Quadrasynth S4 Plus manual, pages 135 onwards - "WHAT’S NEW IN THE 2.0 "PLUS" UPGRADE"</ref>

MelonadeM: plus models.......

2024-09-24T21:26:18Z

plus models.......

New page

{{Infobox module
| name = Alesis Quadrasynth
| image = {{Photo wanted}} '''Alesis Quadrasynth + piano keyboard''' {{Photo wanted}} '''Alesis Quadrasynth S4+ Module'''
| dimensions = 1220 × 115 × 355 (keyboard) 482 × 43 × 150 (module)
| keyboard = 76 keys
| weight = 13.6kg (keyboard) ~2kg (module)
| rackunits = 1U, full width (modules only)
| manufacturer = Alesis
| releasedate = 1995, 1996
| standards = [[General MIDI]]
| maxpoly = 64
| numparts = 16
| numpresets = '''Programs:''' 512 factory, 128 user '''Mixes:''' 400 factory, 100 user
| effects = Variable, see [[#Effects|effects]].
| predecessor = [[Alesis Quadrasynth]]
| successor = [[Alesis QS6]]
}}

The '''Quadrasynth Plus''' refers to an upgrade to the [[Quadrasynth]] released by Alesis in 1995. This documents both the '''Quadrasynth Plus Piano''' as well as the '''Quadrasynth S4 Plus'''.

Many of the elements from the prior synth remain intact, but the v2.0 upgrade adds a lot of new things, such as an entirely new [[General MIDI]] mode, three extra banks of non-editable preset sounds (one of which is a GM-compatible map), adds either 4Mb or 8Mb worth of new waveforms depending on if you're using the module or keyboard respectively, mostly located in their own wave groups<ref>Alesis Quadrasynth Plus manual, page 37 - "Overview - Chapter 4".</ref>, expands the effects section to include higher fidelity effects, as well as a new "overdrive" algorithm, new LFO shapes, the ability to change banks via the use of CC#0 (Bank MSB/Bank coarse), support for panning, and more.<ref>Alesis Quadrasynth S4 Plus manual, pages 135 onwards - "WHAT’S NEW IN THE 2.0 "PLUS" UPGRADE"</ref>

The demo tracks have been replaced as well, three new tracks and a shorter version of Bach's Bad Dream is available, albeit it seems to set the pitch bend ranges for the square lead errorenously. It is unknown if these new tracks have any names or who composed them at this time however it is likely the same person who sequenced the original two demo tracks, Stephen Kay.

== Effects ==

==== Configuration #1 to #4 ====
Effects from the previous iteration are still present, however Configuration #1 and #3 have been changed to lock the third pitch unit into a permanent "resonant" mode, made as a concession for higher quality sounds.<ref name="qsplus-effect-change">Alesis Quadrasynth S4 Plus manual, page 145 - "Effect Configurations 1 and 3, Send 3 Pitch"</ref>. Please see [[Alesis Quadrasynth#Effects|the previous effect listing]] for more information about the first four configurations.

==== Configuration #5 - Overdrive > Chorus > Delay > Reverb > Leslie ====
4 FX sends are available, but only FX1 gets access to the overdrive module, which is introduced with this upgrade. All the modules here are fully editable, and with exception to Overdrive can all be routed to any effect send (but not multiple). Terminates with an equalizer module.

== Alesis Quadrasynth Plus Piano ==
Beyond firmware, the keyboard body has been recoloured from gray to black. It and the module would also include a software called Sound Bridge, which could interface with a PCMCIA card to upload extra samples. Notably, it could load SampleCell formatted files as well.<ref name="qsplus-additions">[https://www.soundonsound.com/reviews/alesis-quadrasynth-plus# Sound on Sound, November 1995 issue].</ref><ref>Alesis Quadrasynth S4 Plus manual, page 10 - "A word about Sound Bridge"</ref> These cards could also be used to store extra programs and mixes if desired.

== Alesis Quadrasynth S4 Plus ==
[[File:Alesis-s4-plus-vector.jpg|315px|thumb|right|Illustration of the Alesis S4 Plus, based on a version found in the manual with added colour.]] Released in 1996, this is a rackmount version of the Quadrasynth Plus Piano, except it omits the extra piano sounds, for a total of 20 megabits of sample ROM. Software-wise, it is identical in all other respects. The QSPlus bank has been renamed to S4Plus.

The rackmount body itself features a few changes: "EXPANDED ROM - GENERAL MIDI" text can be found below the 8 buttons on the left, a bracket below the PAGE pair of buttons indicate that these can also increment or decrement a value by 10, the VALUE pair of buttons have a similar bracket, but for incrementing or decrementing by 1, and the logo has a fancy "Plus" handwritten on top of the logo.

== References ==

[[Category:General MIDI devices]][[Category:Alesis Quadrasynth devices]]