MTHRBORD.STUDIO offers four free plugins: two EQs, a phaser and a tape emulator. This article summarizes the distribution details and features of each MTHRBORD.STUDIO free plugin.
Please use it as a reference.
MTHRBORD.STUDIO Free Plugin List
- EQ5500 (EQ)
- EQP-1A (EQ)
- SLUSH3R (Phaser)
- VHS3R (Tape Emulator)
EQ5500 (EQ)
EQ5500 is a discrete transistor-based EQ that emulates a legendary American EQ design featuring op-amps and a distinctive Proportional-Q circuit. With Proportional-Q, the filter bandwidth narrows as the boost/cut amount increases. Small settings sound smooth and musical, while higher gain gives a tight, aggressive response.
- GAIN: 21 steps from -12 to +12 dB (Q is linked to gain)
- FREQ: 8 detents for each of the LO, LO-MID, HI-MID and HI bands
- LO/HI bands switchable between bell and shelf
- HP-FILT: 40-600 Hz, 12 dB/oct
- Per-channel IN, M/S processing and hardwire bypass (BYP)
- Presets (user presets are saved as text files)
- LINK 1 > 2 (right channel follows left channel)
- CLEAN / CHARACTER modes
- Runs internally at 176.4 kHz or higher
- Supported: Windows VST3 and Standalone (64-bit); macOS VST3, AU and Standalone (Apple Silicon / Intel, 10.13 or later)
- Free to use forever
EQP-1A (EQ)
EQP-1A is a tube EQ built by recording and measuring a vintage Pultec EQP-1A and rebuilding it with advanced circuit modeling. Every knob, switch and boost/attenuation setting was run through the real unit and analyzed, reproducing not only the frequency response but also the subtle imperfections of the hardware.
- LOW FREQUENCY: CPS 20, 30, 60, 100 Hz; BOOST (shelf 0-13.5 dB); ATTEN (shelf 0-17.5 dB)
- HIGH FREQUENCY: KCS 3, 4, 5, 8, 10, 12, 16 kHz; BOOST (peak 0-18 dB); BANDWIDTH (sharp to broad)
- HIGH ATTEN: ATTEN SEL 5, 10, 20 kHz; ATTEN (shelf 0-16 dB)
- IN switch toggles the EQ on/off, with a lamp that lights with the input signal
- CPS, KCS and ATTEN SEL are 4-, 7- and 3-step rotary switches, just like the original
- Factory presets and user presets
- Stereo (the model runs on each channel)
- Supported: VST3, AU and Standalone (64-bit); macOS 10.15 or later (Intel / Apple Silicon universal) and Windows
- Free to use forever
SLUSH3R (Phaser)
SLUSH3R is a free barberpole phaser made for plunderphonics, vaporwave and slushwave. It is designed so that simply turning the RATE knob slowly gives you that slushy sound right away.
- Endlessly rising/falling barberpole sweep
- Sweep 1 (BIG SLUSH): RATE, FEEDBACK, MIX. Turn RATE right to rise, left to fall
- Sweep 2 (SURGICAL SLUSH): controls a sweep fixed at a 2-octave width (move left/right across 40 Hz-16 kHz, up/down for resonance), SPEED, MIX
- Both sweeps displayed in real time
- Zero latency; bit-clean when bypassed or with everything off
- All controls are smoothed, so there is no zipper noise even with automation
- Supported: VST3, AU and CLAP (64-bit); Windows and macOS (Intel / Apple Silicon)
- Free to use forever
VHS3R (Tape Emulator)
VHS3R is a free VHS tape emulator that makes your tracks sound as if they were recorded on VHS. It rebuilds the signal path stage by stage, from the recording preamp and magnetic tape to transport instability and the playback circuit, and each stage can be switched on or off individually.
- Switch between two decks (VHS / BETAMAX)
- WOW, FLUTTER, DROPOUT, and TAPE AGE to choose between new and old tape
- PREAMP, NOISE (HUM / HISS), and TONE for playback effects
- SQUASH combines the deck’s automatic level control into a single knob
- Turning off a section with its LED switch gives a complete bypass
- INPUT and OUTPUT (dB), and MIX with delay compensation
- Mono/stereo support; all controls are smoothed
- Supported: VST3, AU and Standalone (64-bit); Windows and macOS 10.15 or later (Intel / Apple Silicon universal)
- Free to use forever
Demo video samples: Splice Sounds (BOS_DUS_110_Keys_Piano_Loop_Morningwalks_Dry_D#, DSC__110_drum_loop_drumsclaps_fever_dry)
How to Install and Activate MTHRBORD.STUDIO Plugins
Click “Download free” on the official product page, enter your email address, and use the license key and download link you receive to install and activate the plugin.
That is all the free distribution information for MTHRBORD.STUDIO plugins.

