MD RX950 Manuel utilisateur
V 1.1.1
Table of content
Introduction 3
Installation 4
Customer support 5
The RX950 6
The interface 7
The Input Gain knob 8
The Audio Bandwidth knob 8
The Filter knob 9
The Output Level knob 9
The Mono button 9
Presets suggestions 10
The Settings panel 11
Display Scale setting 11
Audio Bandwidth Brilliance knob 11
Parameter Value Keyboard Typing 11
The Back panel 12
MIDI Control Change table 12
Default NKS controls 13
End-User License Agreement (EULA) 14
Disclaimer 16
Credits & Thanks 17
2
Introduction
FOREWORD
Does the Akai S950 need an introduction? If you’re reading these pages, probably not. Also, you
probably already know the holly reputation this iconic sampler, released in 1989, still has today.
Personnally, I had the chance to learn to use one of these when I was 7. At the time, I was fascinated
by the ease of use of this hefty machine for seamlessly playing back anything we would throw into it
(not to mention the « reverse » feature that is quite hilarious to play with when you’re a child). Years
later, I only heard about this device’s sound characteristic its fans call the « grit ». And I eventually
could personnally experience it. Yes, this instrument affects the sound. This is not an audio myth.
Everybody talks about the 12-bit resolution. But is it all?
This simple question gave birth to the RX950. And to a whole year of work. Because it required a lot
of precision and patience to gather such subtle ingredients.
FOR CURIOUS PEOPLE
The answer to our foreword’s question is: no, the 12-bit resolution does not make it all. A disassembly
and a long reverse engineering of our own S950 has revealed an actual poem of conception signed
by Akai.
This sound « color » comes in particular from the gain applied to the input signal that is later
generously ltered before being sampled. At this state, the spectrum is already nicely altered. Then
comes the very analog-to-digital conversion with a 12-bit resolution (which is all by itself an actual
masterpiece that we managed to replicate). During playback, the sound, converted back to analog is
affected by a last lter whose the frequency cut depends on both the playback setting, but also on
the bandwidth setting while recording. This allows to reduce aliasing artifacts as much as possible,
thanks to, in particular, the use of 6th-order Butterworth low-pass lters.
At each step, it has been fascinating to note that Akai’s ambition had obviously been restrained
by technical limitations (as well as costs) at the time, but in any case these issues were solved in a
musical way.
We hope you’ll love to play with our plug-in as much as we had pleasure to develop it.
Sincerely,
Mathieu Demange
3
Installation
VST2, VST3, NKS, AUDIO UNIT, AAX
https://www.mathieudemange.fr/rx950-classic-ad-da-converter/
Windows Minimal requirements: Windows Vista (32/64-bit) and higher
Mac OS X Minimal requirements: macOS 10.7 (32/64-bit) and higher
1. Download the installation program from your order conrmation email
2. Run the installation program
3. Choose the desired plug-in versions
4. Run your DAW and nd the RX950 in the effects list
RACK EXTENSION (PROPELLERHEAD REASON)
https://shop.propellerheads.se/rack-extension/rx950-classic-adda-converter/
Windows / Mac OS X Minimal requirements: Reason v7.1 and higher
1. Download the RX950 from the Propellerhead Shop
2. Recommanded: sync your Rack Extensions for ofine use
3. Run Reason and n the RX950 in the effects list
AUv3 / IAA
https://itunes.apple.com/app/rx950-classic-ad-da-converter/id1406136418
iPhone / iPad / iPod Touch Minimal requirements: iOS 9.3 and higher
1. Download the RX950 from the App Store
2. Run the RX950 or open it as an effet from a third-party musical app.
4
Customer support
Thank you so much for buying our product!
We swear we won’t let you down if your have questions:
‐Read our FAQ,
‐Contact us for any information,
‐Report a bug...
Reach us at: https://www.mathieudemange.fr/support/
You can also get in touch with us on social networks:
https://www.facebook.com/mathieudemange.fr/
https://www.instagram.com/mathieu.demange
https://twitter.com/mathieudemange
https://www.youtube.com/MathieuDemange
https://soundcloud.com/mathieu_demange/
5
The RX950
The RX950 Classic AD/DA Converter is an effect plug-in designed to be used in your DAW running
on Windows, macOS or iOS.
The RX950 has been designed to give your sound the unique color, the warmth and grit of the
Akai S950 sampler. Indeed, this iconic sampler from the end of the 80’s was famous for its musical
qualities, and even if the hi- standards weren’t entirely met, it induced a soft saturation, a 12-bit
resolution, a subtle aliasing effect and a low-pass lter everyone recognize. These are all the
qualities you can expect from a real music instrument that played its part in the birth of major music
genres like hip hop and house music.
To perform the entire range of these characteristics, the RX950 follows, step by step, every stage
of audio processing of the original machine, as if your sound had been sampled then played back in
real time:
‐Line input
‐Analog gain
‐ Pre-ltering
‐A/D conversion
‐D/A conversion
‐ Post-ltering
‐Line output
Our own S950 has been paintaskly studied and its sound thoroughly compared in order to obtain
these unique sound capabilities.
The RX950 is used :
‐to process separate tracks (beats, basslines, synth parts, loops...)
‐to process the master output bus of your entire composition
‐to process wet signals of your delays or reverbs
‐to process things we probably don’t know yet.
We hope that the RX950 will give you full satisfaction, and that as a connaisseur (or not) of
the legendary sampler our plugin is inspired of, you’ll like the sound of it and the creative possibilities
it offers.
6
The interface
1. Settings button (all versions except Rack Extension)
Access graphical interface scaling options
Access sound brilliance knob setting
Displays software version informations (useful for support requests)
2. Input signal LED-meter
Monitors the input signal processed by the RX950
3. Input gain knob
Adjusts the S950’s characteristic soft saturation
4. Audio bandwidth knob
Adjusts the sampling frequency circuitry
5. Filter knob
Adjusts the low-pass lter’s frequency cut
6. Output level knob
Adjusts the nal output level
7. Mono toggle button
Operates a 50/50 mix of left and right channels for working in mono (as done by the S950)
7
1 2 3 4 5 6 7
The Input Gain knob
The Audio Bandwidth knob
This knob adjusts the analog gain simulation for applying a non-linear,
soft saturation. Its very high amplitude allows it to adapt to many types
of sounds for giving them the famous S950’s grit.
This knob sets the sampling circuitry’s bandwidth. It impacts the pre-
ltering stage as well as the sampling frequency stricly speaking.
Internally, this value is muliplied by 2.5 to obtain the sampling frequency
(so the S950 was able to sample up to 19 200 x 2.5 = 48 KHz).
Note that the audio circuitry of the S950 induces a light boost in the
upper spectrum. This can be heard when the Audio Bandwidth knob is
set near its max values. You can enhance or tame this setting using the
Brilliance knob in the Settings panel.
FINE-TUNING VALUES
To obtain more precise controls with the knobs, once the left mouse button is pressed, press
simultaneously the Alt key (or Shift in Reason).
8
The Filter knob
The Output Level knob
The Mono button
This knob adjusts the S950’s famous low-pass lter. It’s a non-
resonant 6th-order Butterworth lter.
This know sets the output level of the RX950, and allows for example
to compensate an excessive input gain level.
This knows allows to toggle the plug-in’s output in mono mode, by
applying a 50/50 left and right channels mix. This process allows to
work in the same conditions as on a S950, but is also a useful mixing
tool (for detecting phase issues in particular).
9
Presets suggestions
10
Default settings 0.00 10000 99 0.00 OFF
Drums Fattener 10.40 12769 99 -6.85 OFF
Floppy Fire 17.69 19200 44 -10.35 ON
Golden Era 1.78 5866 97 -0.30 ON
Hi-Fi Brightness 1.39 19200 99 -2.34 OFF
Lo-Fi Goodness 1.39 7015 99 -2.34 OFF
Monomaniac 0.00 18079 65 0.00 ON
Party Inside 7.55 3000 0 -3.64 ON
Radio AM 18.29 9350 53 -12.18 ON
RAM Shortage 1.40 4676 99 -1.56 ON
Resampled 7.89 6687 59 -6.03 ON
Saturated Vox 18.29 9788 99 -12.87 ON
Sound System 8.94 19200 60 -6.17 OFF
Speaker Destroyer 19.54 5467 99 -10.51 OFF
Stone Deaf 12.10 9535 40 -4.93 ON
Street Cred 3.24 9009 63 -3.48 OFF
Subtle Warmth 1.68 13880 99 -1.71 OFF
Twelveness 2.83 3000 99 -1.24 ON
Vocal Thickener 11.95 12462 99 -7.72 OFF
Worn Out 4.32 4810 48 -1.37 OFF
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