Doctor Synth’s Favorite Free Effects:
Tools I keep in my toolbox
Please donate to the creators if you use their downloads.

Audio Damage – Rough Rider 3
Blue Cat Audio – Free Pack
Chorus, Flanger, Amp, FreqAnalyst, Gain Suite, Phaser, Triple EQ
Cableguys – PanCake 2
Panning control
Caelum Audio – Flux Mini + Tape Cassette 2
Synchronized amp & filter custom envelope + cassette tape effect
Camel Audio – Camel Crusher
Camel Audio is no longer in business, having been consumed by Apple
Digital Fish Phones – Fish Fillets
Blockfish compressor, Floorfish gate, Spitfish de-esser
Ignite Amps – Electric Bass & Electric Guitar amplifier models and effects

  • Libra – 8 channel impulse response convolver for cabinet simulation
  • Emissary – dual channel tube amplifier emulation
  • NadIR – dual impulse response convolver (simpler than Libra 8)
  • Profet-1 – high gain distortion preamp / stomp box effect, won the KVR Developer Challenge 2018
  • NRR-1 – three channel tube preamp
  • The Anvil – three channel tube preamp
  • TPA-1 – Class AB tube power amplifier
  • SHB-1 – Extreme Bass amplifier
  • PTEq-X – Emulation of 3 passive equalizers
  • TSB-1 Tyrant Screamer – Inspired by the 808 overdrive pedal but modified to make it suitable for downtuned guitars
  • TS-999 SubScreamer – overdrive pedal for guitar
IKM Amplitube 5 Custom Shop IK Multimedia – AmpliTube 5 Custom Shop
Guitar Amp & FX
IKM T-RackS 5 Custom Shop IK Multimedia – T-RackS 5 Custom Shop
Mixing & Mastering Plugins
iZotope Vinyl
Creates the crackle and hiss of your old LPs.
Kilohearts – Toolbox Free

  • 3-Band EQ
  • Chorus
  • Delay
  • Gain
  • Limiter
  • Stereo
Klanghelm Audio Plugins

  • DC1A Compressor
  • IVGI saturation & distortion
  • MJUC jr variable tube compressor

Melda Production – MFreeFX Bundle
A collection of 37 tools including analyzers, panning, comb filters, tremolo

Metric Halo – Thump
Adds sub frequencies to improve the weight of bass and drum parts.
Penecheg Tremolo Pecheneg – Tremolo
Allows LFO modulation adjustments and synchronization with host DAW

Pecheneg Tremolo

PSP Audioware – Pianoverb
Piano string reverberation
PureMagnetik – Driftmaker
Delay Disintegration Device
They provide additional free tools if you join their Patreon.
Sir Audio Tools – Sir2
Convolution reverb Impulse Response Library – to use with convolution reverbs Impulse Response Library
TAL Software – TAL Effects
Chorus-LX, Filter, Reverb-4, Vocoder
TB Audio – GSat+
Saturation, dpMeter, STilt Equalizer, ISOL8 Mix Monitoring Tool, MVMeter 2
TDR Kotelnikov TDR – Kotelnikov
Wideband dynamics processor
TDR Molotok TDR – Molotok
Dynamics Processor
TDR Nova TDR – Nova
Parallel Dynamic Equalizer
Tritik – Krush
U-He – Protoverb
Room simulator
Valhalla – Freq Echo
Dubby frequency shifter + echo
Valhalla Space Modulator Valhalla – Space Modulator
11 Flanging algorithms
Valhalla Supermassive Valhalla’s Supermassive
A superb echo + reverb
16 effects and utilities including SPAN spectrum analyzer
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