P821 · ANALOG TAPE MACHINE EMULATION

P821 MDN Tape

The Stephens 821, the machine behind Rumours, Aja and The Wall

Modeled on Marc Daniel Nelson's personal Stephens 821 2" tape machine. Transformerless, with no capstan and no pinch roller, its free-moving tape path gives a massive, open soundstage with no aggressive clamping. The first plugin of its kind where you are actually hearing tape, and how it reacts.

PRICE
Original price was: $179.Current price is: $143.
Acquire Try free 15 days
· 456 & 900 formulas · 15 / 30 ips · zero latency
P821 MDN Tape plugin interface
01 — The Machine

Transformerless. No capstan. No pinch roller.

The Stephens 821 removed the electronics other decks piled on. With almost nothing in the audio path and zero transformers, the tape moves freely and the stage opens wide. You hear the size of the recording, not the machine clamping down on it.

02 — Two Formulas, Two Speeds

456 for character. 900 for clean.

456 saturates sooner for the glue heard on decades of rock, pop and country. 900 stays clean further up with more headroom and air. Pair either with 15 ips weight or 30 ips clarity, four voices of the same machine.

03 — A Whole Tape Studio

Hiss, wow, flutter, flange, tape echo.

A true tape-hiss generator, Wow & Flutter with tape flanging, a tape delay with feedback and filtering, Lo-Fi voicing, Pre/Post shelving EQ, LO/HI bias, and Stage Focus with CENTER for the wide 821 image.

— The Producer's Workshop

The Stephens 821 has been called the best-sounding tape machine ever made. This is that machine.

Marc Daniel Nelson with his Stephens 821 tape machine
Marc Daniel Nelson with his Stephens 821 at the Producer's Workshop

P821 MDN Tape is built on Marc Daniel Nelson's personal Stephens 821 2" deck, one of the machines that lived at the Producer's Workshop through the '70s and '80s and captured Rumours, Aja, The Wall, Goodnight Vienna and countless other records. John Stephens set out to build one machine to rule them all: he removed the capstan and pinch rollers, relied on light sensors so the tape moved freely, and designed a proprietary input and output amp that worked without transformers.

The result was the 821A, the first transformerless multitrack tape machine with no capstan and no pinch roller. A free-flowing tape path, no resistance, and nothing to degrade the audio signal.

Rather than sampling a snapshot of tape, P821 uses algorithmic modeling honed over years to recreate tape's behavior in real time, transient shaping, saturation, gentle compression and subtle non-linearities, across a wide range of sources and levels. Because the 821 was solid state, the reward lives in the sweet spot: drive into the tape's range and it flatters the source; the tone stays musical rather than fizzing apart.

Nearly two years in development with Marc Daniel Nelson. The first plugin of its kind where you are truly hearing how tape reacts. Pure size for miles.

Every feature, considered.

Tape Formula

Two legendary formulas: 900 & 456

At a given INPUT, 456 hits saturation sooner for richer harmonics and earlier compression. 900 takes more drive to saturate, higher headroom, lower noise, more transparency. Character or clean, same machine.

Tape Speed

15 and 30 ips

15 ips adds a low-frequency bump and gently softens the highs for weight and vintage vibe. 30 ips tightens the lows, extends the highs and lowers noise for clarity and headroom.

Tape Hiss

A true tape-hiss generator, not noise

A small amount makes reverb and delay tails feel continuous and adds a perception of air. It reads as part of the recording medium, and it settles to a stable floor instead of building up in the delay.

Modulation

Wow & Flutter with tape flanging

The motion of a physical reel: slow WOW drift and faster FLUTTER, with a Slow/Fast switch from believable machine wobble to dramatic swings. The same motion feeds a short comb for authentic tape flange.

Tape Delay

IPS + Offset, feedback and filtering

A tape echo with time set by delay speed and Offset, from tight doubling out to long dub echo. Feedback is voiced to never self-oscillate, with dedicated HPF and LPF that darken each repeat.

Shelving EQ

Pre or Post the tape

Broad, musical LO and HI shelves. PRE drives more energy onto the tape so it saturates and commits; POST shapes the final tone cleanly. Same knob, two classic tape-room jobs.

LO & HI Bias

Voice the tape itself

Two trims that tilt the low and high response as part of the tape circuit. They interact with how hard the tape is driven, the classic way to fine-tune a machine's tone.

Analog VU Meter

Dual needles, PEAK LED, sensitivity screw

A VU meter with dual input/output needles and a dBFS or classic dBU theme, calibrated so −18 dBFS RMS reads around 0 VU. The glass glows brighter as you drive harder.

Stage Focus & CENTER

Fit the wide 821 image to your mix

The 821's native stereo image is exceptionally wide. Stage Focus reins it in when a mix is already balanced; CENTER anchors the low end and center to mono while the sides stay open.

— The engineers behind the records

From the pros who know this machine.

“There's a lot of plugins that come close. There's a lot of things that get us nearly there, but this is the first time that I feel like the soul of tape is represented in a plugin. No other tape plugin has come close to this. The P821 MDN Tape is really remarkable.”
Dale Becker
Dale Becker
Grammy-winning Producer · Mastering Engineer
Billie Eilish · Doja Cat · Katy Perry · Kanye West
“The Stephens 821 is the best-sounding tape machine ever made, and the P821 MDN Tape is the best tape machine in a plugin and unlike anything out there by far. It was a joy to hear this plugin doing the scientific process as it was designed. What more is there to say? It's that good. No need to hype with silly marketing; just listen to it.”
Clay Blair
Clay Blair
Producer · Engineer, Boulevard Recording
The War on Drugs · Counting Crows · Andrew Bird
“I know this machine well, as I used it to record and mix Fleetwood Mac's Rumours album at the old Producer's Workshop. Finally a tape emulation that doesn't sound like a mess. Reminds me of that beautiful sound of the original Stephens tape machine. That thing made me sound like a genius and the plugin is just incredible.”
Ken Caillat
Ken Caillat
Multi Grammy-winning Producer · Engineer
Fleetwood Mac · Joni Mitchell · Paul McCartney · Pink Floyd
“Not only is the P821 MDN my new favorite analog tape plug-in, it's also my new favorite lo-fi, flange, and slap delay effect, all with an intuitive user interface and great graphical feedback. I find myself using it as much for the lo-fi, flange, and delay as I do for the tape saturation, which itself adds a wonderful, glued finish to my mix and gives me that glorious 15 ips low end bump if I need it. Marc has done it again, giving us engineers another great tool to elevate our mixes and our creativity.”
Ryan Freeland
Ryan Freeland
Multi Grammy-winning Producer · Engineer
Ray LaMontagne · Aimee Mann · Bonnie Raitt · Morrissey
“I used to own the actual Stephens 821 deck used to create the P821 MDN Tape plugin and agree it was the best-sounding tape machine ever made. The P821 sounds amazing and adds an analog quality I have never gotten with any other plugin.”
Mark Linett
Mark Linett
Record Producer · Audio Engineer
Brian Wilson · Randy Newman · The Beach Boys · Rickie Lee Jones
“Wow! Pro Tools at 96k, it sounds as transparent and huge as I remember hearing from the wonderful Stephens in Armin Steiner's Sound Labs mix room. It is utterly amazing to hear a plugin take me back to that experience.”
Bob Olhsson
Bob Olhsson
Legendary Motown Producer · Engineer
“I had a chance to try out the P821 plugin and it was fantastic! It really opened up the mix in a crazy way. I was expecting your standard tape plugin thing, but it is totally its own thing. My mix sounds bigger and with more depth than before, but without any tonal change. The P821 MDN Tape really blew me away. It feels like you're actually working with tape: huge sound, tons of depth, and it reacts to input in a way that's super organic. It's the closest I've heard. It's now a go-to in my mixes, and I can already tell it'll be a part of my sound moving forward.”
Alex Pasco
Alex Pasco
Grammy-winning Producer · Engineer
Paul McCartney · Adele · Beck · Foo Fighters
“This sounds insane! If you want to make a sound come to life, use the P821 MDN plugin. Effortless magic. Marc did it again!”
Dave Pensado
Dave Pensado
Multi Grammy-winning Producer · Engineer
Beyoncé · Justin Timberlake · Mariah Carey · Shakira
“I put this on a kick drum and instantly was like, what the hell! The low end dropped way lower but got way more clear. How on earth did you do this? This on background vocals too is just dope. This plugin sounds incredible.”
ROC.am
ROC.am
Producer · Engineer
Rihanna · H.E.R · Mariah Carey · Erykah Badu · The Roots
“This new Pulsar Modular P821 Tape plugin is absolutely magic. I have had the pleasure and privilege of working on several Stephens tape machines, and the 821 MDN is the best representation of tape I have ever heard.”
Darrell Thorp
Darrell Thorp
Multi Grammy-winning Producer · Mixer · Engineer
Radiohead · Beck · Paul McCartney · Foo Fighters
“When I tell you that the P821 MDN tape machine plug-in offers the very best 456 emulation in the game and instant access to authentic creamy tape flange, it's because I heard it for myself in the first 5 minutes. We all know that tape machine plug-ins offer the illusion of access to the imperfect world of analog colors that paint the audio pictures we love, but some are better than others and this one rises above. You will see for yourself that the P821 MDN delivers on everything we all love about tape: transient control, saturation, modulation, delays and tonal character. Run to test it on individual tracks, groups and your final master.”
Dweezil Zappa
Dweezil Zappa
Musician · Producer · Engineer

The technical bits.

Emulation
Marc Daniel Nelson's Stephens 821 2" transformerless multitrack tape machine
Tape
Two formulas (456 & 900) · two speeds (15 & 30 ips) · TAPE and THRU paths
Formats
AU · VST3 · AAX (Apple Silicon ready)
Mac
macOS 10.15.4 (Catalina) for Intel · macOS 11.0 (Big Sur) for Apple Silicon
Windows
Windows 10+ · x64-compatible CPU
Metering
Analog VU with dual input/output needles · PEAK LED · dBFS or dBU theme · −18 dBFS RMS ≈ 0 VU
Latency
Zero samples with Modulation off · 1.1 ms with Modulation on
Presets
Factory library plus Pro Tools (.tfx) preset support
License
One-time challenge & response over the internet. Works on up to 2 separate machines. No dongle.
— Customer Reviews

What owners say.

5.0
★★★★★
Based on 37 reviews
5
97%
4
3%
3
0%
2
0%
1
0%
Sort
MS
MJ Smith
Verified Owner
June 25, 2026
★★★★★

I own and use UAD tape emulations (Studer & ATR-102), but didn't gel with Arturia's J37 emulation, despite liking their Tape Mello. I rate Softube Tape, was a healthy upgrade from Waves' J37 and Kramer tape emulations. There are many others I have not tried, but I am confident that the P821 will blow them out of the water much like it does with the above I mentioned. I spent a good month testing this out across various mixes, before purchasing. It's a superb sounding plugin and absolute diamond for mixing and mastering. Looking forward to deep diving other plugins by Pulsar.

SD
Scott D
Verified Owner
April 6, 2026
★★★★★

Aside from a very select few tape emulations, I always felt like most were just compression/EQ/saturation. MDN Tape is different — 3D, with a real low-end bump and, dare I say, "analog" sound and feel. The video from MDN intrigued me. The demo sold me on it. It will for sure live on my 2-bus from now on. Thank you, Pulsar Modular, for another great win for in-the-box mixing. Try it. Just try it...

GS
Gwon Seung Cheol
Verified Owner
March 6, 2026
★★★★★

True masterpice!! amazing sound

DS
Dirk Schulz
Verified Owner
February 6, 2026
★★★★★

A masterpiece!

CR
Chris Robinson
Verified Owner
October 16, 2025
★★★★★

I have no idea how Pulsar Modular managed to create a plugin that extends the low end like this—but they did! Truly outstanding, with amazing creative possibilities when you start experimenting. A mega plugin!

TH
Tommi Hartikainen
Verified Owner
October 13, 2025
★★★★

Highly usable, very responsive, quite versatile, and above all: weighty, characterful-sounding tape saturation. Bonus points from me for the linkable input-output, useful modulation, and being extremely light on the CPU!

B
Buonanotte
Verified Owner
October 11, 2025
★★★★★

Best tape plugin to date in my opinion. Does wonders on drum tracks and busses. Doesn’t always work on the mixbuss for me, but when it does, it’s really special. You can look at the meter, but I suggest tuning the input on linked mode by ear. The bias control on lows and highs makes it really versatile, and I love the tape delay option.

EP
Eduardo Poplawsky
September 24, 2025
★★★★★

Another winner from Ziad and Marc. It is nice to have additional features such as hiss, flange, modulation and delay. Love the sound. I have other tape emulations, yet this one will certainly get a lot of use. I love the sounds I'm getting. Nice combo with P455.

AS
Andreas Schaefer
Verified Owner
September 22, 2025
★★★★★

Giving mixes a special touch...

R
RL
Verified Owner
September 20, 2025
★★★★★

Both Pulsar Modular MDN plugins are truly amazing

AL
Alex Lakis
Verified Owner
September 19, 2025
★★★★★

Loving this on master bus! I actually use this in conjunction with Slate's VTM, relying on the P821 for wow/flutter. This plugin works as a tone-box, sporting a "lo-fi" mode that is very nice and even a flanger! The one thing I wish it had was a stop/play button for funsies!

JG
Jeremiah Goertz
Verified Owner
September 12, 2025
★★★★★

I put this on a piano track and got a really sweet lo-fi nostalgic retro feel. Give it a try!

ML
Mike Lawetto
Verified Owner
September 11, 2025
★★★★★

I’ve owned nearly every tape plugin on the market—tape emulations were my main obsession for years. By 2022, I finally gave in and went fully analog, and for the first time, that craving felt satisfied. Since then, I haven’t touched a new tape plugin… until now.

I can’t fully explain what MDN Tape is doing under the hood—just like I’ve never completely understood what makes analog tape sims tick—but this one feels right. It has that elusive quality that works on almost anything you throw at it. Also... How the hell does it sound this good AND be so CPU friendly.

AS
Aaron Staniulis
Verified Owner
September 10, 2025
★★★★★

Honestly not just "another tape" plug-in at all... a great emulation of a unique machine that really gets to the essence of what tape does and isn't just a glorified pre-amp emulation. Also. a wildly under appreciated FX/vibe box with its creative controls at the bottom. My favorite thing might be what it does to bass/sub energy, placing it "outside" or "around" the speaker while keeping it punching like no other ruin of the mill stereo image tool does, sometimes I use it just for that aspect. If you think you already have this in your arsenal, you don't.

D
Damien
Verified Owner
September 10, 2025
★★★★★

Excellent for a digital summing effect and excitement.

HA
Han Allred
Verified Owner
September 10, 2025
★★★★★

It’s become my new favorite tape flavor. It’s getting used all over my projects.

S
Silouane
Verified Owner
September 3, 2025
★★★★★

Absolutely incredible. I’ve rarely had a true “wow” moment with a plugin, but this one hit me harder than any other. The sound it delivers is unmatched — the sense of depth and width is stunning. Everything becomes richer and more alive, and when you bypass it, the mix suddenly feels plastic and artificial by comparison.

F
Flare
Verified Owner
August 23, 2025
★★★★★

Give P821 MDN Tape a shot on your master bus once and it instantly reveals itself to be something quite special indeed, the only tape emulation out there that really focuses on injecting that special ethereal tape quality instead of stopping at just some harmonics and modulation. This will be living on almost all of my mixes going forward.

JM
John Marshall
Verified Owner
July 10, 2025
★★★★★

Really nice tape emulation. I'm enjoying using it a lot all across my mixes. I work mainly with acoustic instruments and vocals, and I find that this plugin is very well suited to this type of music.

J(
Jan (van) Dark
Verified Owner
July 6, 2025
★★★★★

I already had some excellent tape plug-ins. And again, this one is different. I especially like how it brings out these little subtleties and details which you would barely notice when it's off. I highly recommend checking it out. You wouldn't want to miss out.

C
Christian
Verified Owner
July 2, 2025
★★★★★

Excellent tape simulation plugin, unlike any other, tight bass and instant 3D effect.

JS
Jerry Svensson
Verified Owner
July 1, 2025
★★★★★

Really like the ”life” this plugin brings to the mix when mixing into it on the mixbus.
So far it seems like 456 and 15” is my favorite for this effect. Center image button on and the spread-button on max.
Haven’t been able to reach that depth and space with other plugins.
It can also do great things on buses and on f.ex snare.
But bringing it on everything seems making it easy to go over board with it.

TK
Takashi Kobayashi
Verified Owner
July 1, 2025
★★★★★

Exellent!!!!!

E
Eric
Verified Owner
July 1, 2025
★★★★★

I've been using this quite a lot and loving the results. Part of my channel strip from here on..

D
Daniel
May 21, 2025
★★★★★

Great tape plugin, gives a holographic depth to vocals I've not heard a plugin do before. I'm not familiar with the hardware, but it's doing the same sort of thing to the depth on vocals that can be heard on I Love You by Eddie Holman.

S
Squig
April 11, 2025
★★★★★

This thing is phat! I like the bottom, glue, and width P821 imparts on the mix bus (15fps 456). The width button seems to work for me with this one, not so with the P455.

G
Gaëtan
April 6, 2025
★★★★★

This is an amazing plugin! It has something different from all the other tape plugins I've used so far.

MB
Michael Brunetto
Verified Owner
April 5, 2025
★★★★★

Love what this does on drums or a guitar bus. Subtle but really does a unique thing that you aren't going to get out of your other tape emulation plugins.

MW
Mike Watts/Vu Du Studios
April 4, 2025
★★★★★

Have been demoing this thing for bout a week now...It's special! Absolutely reminiscent of tape like I remember. I have most other tape emulation plugs and this one REALLY does the "thing"! Well done!

KM
Kennith Madewell
April 2, 2025
★★★★★

I demoed this and thought it was a good plugin. But! Then watched the Clay Blair video and immediately got a better understanding of what and how to use the P821. Went from good to Awesome. I highly recommend watching his video. GREAT Plugin as Always

PP
Prahn Phorun
Verified Owner
April 2, 2025
★★★★★

I demo this plugin for one day and purchased it in the next day. My ears told me this is what I want for a longtime.

DG
David Graziano
April 2, 2025
★★★★★

I agree with a previous reviewer on this one- Mr. Nelson and Pulsar Modular have really done something special with this one AGAIN. A/B with UAD Ampex-102 and thank me later...

KM
Krunoslav Matus
April 2, 2025
★★★★★

This is the first tape emulation what I really hear and FEEL like real tape and I tried all of them. I hope it will be on sale soon because the price is too much for me. Thanks

CA
Crispy Akiyama
April 1, 2025
★★★★★

I LOVE the imaging quality that this provides. It has an innate ability to place everything in its own space in the stereo field. It also makes the transition between low end to high end a seamless and cohesive through its saturation!

SF
Sean Flemming
March 31, 2025
★★★★★

I A/B'd this with UAD's ATR-102 and this sounds way better. I was surprised.

BO
Bob Olhsson
March 31, 2025
★★★★★

I should have added that it is utterly amazing to hear a plugin take me back to that experience.

IT
illicit tsuboi
Verified Owner
March 31, 2025
★★★★★

Awesome legendary Stephens Electronics 821 emulation!!!
I would use it when I want the texture of a late 70's hi-fi sound that's not dirty tape sound.

Downloads & resources.

User guides in three languages, the interactive quick guide, the Pro Tools presets, and every released version for previously authorized computers.

User Guides — Dark Mode
English PDF
German PDF
Japanese PDF
User Guides — Print Mode
English PDF
German PDF
Japanese PDF
— Interactive

Quick Guide

Hover any knob, switch or button on a working panel and read what it does. The fastest way to learn P821 before opening the plugin.

Open quick guide
— Pro Tools

.tfx Presets

P821 works with Pro Tools .tfx presets in addition to its own format, so AAX users can manage settings the Pro Tools way.

Download presets
— Software

P821 MDN Tape — Installers

For users with an existing license. New buyers receive their download link by email after purchase.

v1.5.0
July 7, 2026
  • Optimized engine: lower CPU and smoother performance across the board
  • Fixed: audible pop when switching the wow & flutter speed (Slow/Fast)
  • Full preset management, now with nested folder support for easier organization
  • Fixed: accordion panel stretching in the GUI
  • New complete preset library, curated by Marc and Ziad
v1.2.5
March 18, 2026
  • Fixed: preset manager crash on certain computers
v1.2.1
May 27, 2025
  • Analog VU meter with PEAK LED and sensitivity adjustment screw
  • Updated user guides
v1.1.0
April 22, 2025
  • CENTER control for a solid center within the stereo image
  • Fixed: A/B preset holder
  • Updated user guides
v1.0.3
April 8, 2025
  • Global option to switch to colorblind-compatible LEDs
v1.0.2
April 5, 2025
  • Delay compensation update for the bypass and Flange buttons
  • VU needles now display correctly at any DAW buffer size
  • Stage Focus disabled when inserting P821 on a mono track
  • Click-drag switching for the Slow/Fast switch
v1.0.0
March 31, 2025
  • Official release

15 days. Fully functional.

Press DEMO and complete the checkout. Follow the instructions you receive by email. Fully functional on 2 computers, no dongle required.

Disclaimer. The intellectual property rights, including names, logos and trademarks associated with studio equipment and accessory brands, including Stephens, belong to their respective owners and are not affiliated with Pulsar Modular or Marc Daniel Nelson. This plugin is designed to replicate the unique audio equalization, compression and summing envisioned by Pulsar Modular and Marc Daniel Nelson. Any use of names, logos or trademarks is solely for identification purposes to illustrate the hardware chain and audio workflow that inspired this product.