Each track is done with one specific synth to create all instruments. It's KVR's OneSynthChallenge that made them manifest. The majority of synths are free vst instruments from the web. It's quite amazing what beauty waits for you to just download it and have at it.
All of them are done with my favorite DAW: MuLab (www.mutools.com)

One Synth Only

OSC#148: Kuma508

instances: 22
DAW: MuLab (www.mutools.com)
FX: EQs, Delays, Compressor, Mid-Side Processor
3rd Party FX: Valhalla Supermassive, OTT, LoudMax, Dimension Expandor, Wider

Taron - Kumbaja [Kuma508]

OSC#156: Synister
No idea why I went for something like this, but I was totally in the mood for it. 

Instances: 1
DAW: MuLab
FX: 4Band EQ, Valhalla Supermassive, Auburn Sounds Panagement 2 (free), Dimension Expander, OTT, Loudmax

Taron - Riverlein+Encore [Synister]

OSC#157: FullBucket's FB-7999

#instances: 23
DAW: MuLab (www.mutools.com)
FX; 4 Band EQ, 2 Band EQ, Highpass Filter, PingPongBeat, Mid-Side Processor, PanDelay, Level Compressor
3rd party FX: Auburn Sounds Panagement (free), OTT, LoudMax, Valhalla Supermassive, GIANT VERB, Dimension Expander

Taron - Biding Time [FB-7999]

OSC#162: V-Station

Instances: 17
DAW: MuLab (www.mutools.com)
FX: Valhalla Supermassive, LoudMax, OTT, Auburn Sounds Panagement, Dimension Expander

Taron - [V-Station] - 001

OSC #165: Spitfire Audio's BBCSO Discover
...just a WIP to have something started for this round!

Instances: 20
DAW: MuLab
FX: Auburn Sounds Panagement (free), OTT, LoudMax64
Commercial FX: Ozone 9, Altiverb

Taron - Crom [BBCSO Discover]

OSC#167:  Any One DAW Synth (MuLab - Poly Synth)

Instances: 15
3rd Party FX: 
Auburn Sounds Panagement, LoudMax, OTT, CHANNEV, Galactic64, Wider64, Valhalla Supermassive

Taron - LeMoux [MuLab: Poly Synth]

OSC#168: Cherry Audio's Voltage Modular
Blixir is a timeline poison. It turns reality into a fleeting dream. At the moment all things appear to make perfect sense, but you cannot hold on to them.

DAW: MuLab (www.mutools.com)
Instances: 11
FX: Auburn Sounds Panagement 2, OTT, LoudMax64

Taron - Blixir [Voltage Modular]

OSC#177: Synful Orchestra

DAW: Cubase
Instances: 3 + VCSO2 Percussion
FX: Cubase EQ, Frequency 
3rd Party FX: Panagement 2, Berlin Studio, LALA, Oril River, Deelay, The God Particle

Taron - Synfully Romantic [Synful Orchestra]

OSC#187: nakst's "ExtraBold"
DAW: MuLab (www.mutools.com)
Instances: 28
FX: Auburn Sounds Panagement 2 (free), TD-Nova, OTT, LoudMax, Dimension Expander

In fact, no Delay or Reverb plugin was used (not even with Panagement; wet on 0%), but only the internal FX within ExtraBold. Reverbs in there are a bit long and there's literally no control over them other than wetness. Curious concept. But, hey, it all works quite well for its simplicity. All in all, pretty neat little synth with just enough control to get plenty of complexity and variety. I like it! 😎👍

Taron - Boldilocks [ExtraBold]

OSC#187: nakst's "ExtraBold"
DAW: MuLab (www.mutools.com)
Instances: 23
FX:2 Band EQ, Level Compressor
3rd party FX: Auburn Sounds Panagement 2 (free), RoomReverb, TDR Vos SlickEQ, TDR-Nova, OTT, LoudMax, Dimension Expander, Airwindows ToTape8

Taron - Prognosis [ExtraBold]

OSC#104: Zebralette
"The Lowdown" represents a possible truth behind the face of splendor, how beneath its conception resides lonely chaos, which- only by its distillation- can reveal but a single thought, hopefully understood by others. The chaos in any greater completeness cannot be polished and will remain in the dark.

Zebralette instances: 47 (surprises even me)
DAW: MuLab (www.mutools.com)
DAW FX: 2 Band EQ, 4 Band EQ, level compressor, cross_delay, tight_room, Mid-Side Processor, OnBeat, TeaVerb02
3rd Party: Auburn Sounds Panagement (free), Abstract Chamber, LoudMax64, OTT, SlickHDR, Nove-67p, Occulus Spatializer

Taron - TheLowDown [Zebralette]

OSC#105: Thorn

"VioLovac - or The Hunter"

Thorn instances: #21 ( http://dmitrysches.com/products/thorn )
DAW: Mulab ( www.mutools.com )
Internal FX: Mid-Side Processor, delay_cross, level compressor
3rd Party FX: Auburn Sounds Panagement, Abstract Chamber, Unlimited, LoudMax64, OTT

Taron - VioLovac [Thorn]

OSC #116: U-He's "Triple Cheese"
Triple Cheese is AWESOME! ♥

Instances: 22
DAW: MuLab (www.mutools.com)
FX: Mid-Side Processor, Vintage Echo 1,  4BandEQ, 2BandEQ, cross_delay, level compressor, dimension expander
3rd party: Abstract Chamber, LoudMax64, OTT, SlickHDR, Auburn Studio's Panagment

For those, who don't know: This entire track uses Triple Cheese instances as only sound source, All instruments, including drums and effects are done with Triple Cheese with only some EQ on certain sounds, some reverb and standard mastering effects like side chain compression and limiters. That means: This is what Triple Cheese can sound like! Also, no instrument is layered, which means, each instrument is a single instance of TC.

Taron - Fall [Triple Cheese]

OSC#119: Waverazor

Instances: 23
DAW: MULab (www.mutools.com)
FX:Mid-Side Processor, 2BandEQ, Vintage Echo2, level compressor, cross_delay, dimension expander
3rdParty: Nova-67p, Abstract Chamber, Auburn Studio Panagement(free), OTT, Limiter6

Taron - RidingToTheEdge [Waverazor]

OSC#128: OB-Xd
Neither here nor there, this is a bit of an exploration and strange indulgence, really. I really like the OB-Xd and could've done something completely different, but hey...

Instances: 20
DAW: MuLab (www.mutools.com)
FX: 2 Band EQ, 4 Band EQ, Vintage Echo 2, delay cross, Mid-Side Processor, level compressor
3rd Party: Nova 67p, OTT, LoudMax64, Abstract Chamber, Dimension Expander

Taron - Neitherland [OB-Xd]

OSC#130: Kilohearts' Phase Plant
What a beautiful synth. I got lost in it in the best of ways. No samples used, I painted a few wavetables and did all sounds from scratch, except the flute, which is the first straight-up preset I've ever used for an OSC song. Too gorgeous!

DAW: MuLab (www.mutools.com)
Phase Plants:  19 instances
FX: level compressor, dimension expander, OTT, loudmax64

That's all, literally no effects, not even EQ on any of the racks, except those mastering limiter and compression to tie things together.

Taron - Sehnsucht [Phase Plant]

OSC#131: Syncla-X

What a curious little wonder this thing is. Not without its challenges, it's capable of pretty incredible sounds and it's interesting to explore.
All presets from scratch, of course...

Instances: 23
DAW:MuLab (www.mutools.com)
FX: 4Band, Parametric EQ, Level Compressor, Cross-Delay, Mid-Side Processor, Vintage Echo 1
3rd FX: Loudmax64, DragonFly Room Reverb, Abstract Chamber, Auburn Studio Panagement, Kotelnikov

Taron - Reef [Syncla-X]

OSC#137 - HY-POLY(free)

instances: 18
DAW: MuLab (www.mutools.com)
FX: level-compressor, cross_delay, Mid-Side Processor, 2-Band EQ, PingPongBeat, Vintage Echo 1, Vintage Echo 2, simple_echo, tight room.
3rdParty: DragonFlyRoomReverb, OTT, LoudMax64

Taron - Hypordia [HY-POLY]

OSC#139: Full Bucket Music's Fury-800

Instances: #20
DAW: MuLab (www.mutools.com)
FX: EQ, Level Compressor, Delays
3rd party: OTT, LoudMax64, Nova 67-p, DragonflyReverb

Taron - Length [Fury-800]

OSC#143: Any Hardware/Emulation (Fullbucket's MonoFury)

Instances: 14
DAW: MuLab (www.mutools.com)
FX: Vintage Echo 1 & 2, Mid-Side Processor, Level Compressor
3rd Party: OTT, LoudMax64, Wider, ValhallaSupermassive, Nova-67p

One Synth Only

Taronium