DDMF phi-L Audio Tube Preamp v2.0.2 x64 x86 VST VST3 AU AAX WiN MAC [FREE] 0 (0)

What is it?
This tube preamp emulation has been developed Philipp Bulling as a thesis work. Philipp has been offering the plugin in VST format for some time on his own website. He has now moved on to new areas for some time already but didn’t want to let down his users. Hence, DDMF took over the code and will continue to offer the plugin as freeware, with the intent to further improve it and maybe add some more bells and whistles in the future.

The plugin is very unique in the sense that it gives you full control over all aspects of the modelled circuit. All values of all the capacitors, resistors etc. can be tuned by the user. Here is what Philipp had written on the original page.

AbstractSince the sound of an analogue tube amplifier has always exerted a strong fascination, electrical circuits with tubes play a certain role in the world of audio engineering up to now. On the other hand, audio technology becomes more and more digitised. In many cases, digital models emulate real devices in such a way that differences in sound are hardly audible. In this work a model is developed which is able to emulate the typical sound of a tube amplifier on digital devices. Here the main focus is on preamplifiers with triodes, since they have a particular influence to the sound.

Based on the physical properties of real tubes, a tube model is developed first. This mathematical model includes results of theoretical studies as well as analysis of data sheets. The model is then used to implement an entire amplifier circuit. In addition to the tube itself amplifier circuits contain several passive elements. In the domain of digital signal processing the latter are described by finite difference equations, which are solved recursively.

The resulting algorithm is finally implemented as an audio plugin in order to examine its tonal properties. The behavior of the digital model corresponds satisfactorily to real amplifier circuits. Important sound effects of analogue tube amplifiers can also be attested to the digital model.

Diode modelThe first step was to develop a triode model, based on the characteristic curves of real tubes. In theory, the characteristic curve of a vacuum tube is described by Langmuir-Child’s law. However, it was quickly realised that compared to real tubes, this law is not accurate enough. So a new model has been developed. This model describes a triode as a mathematical function. With the model, it is possible to compute the plate voltage (Upc) as a function of the grid voltage (Ugc), depending on the working resistor (Ra) and the supply voltage (Ub).

The following graph shows this function for a 12AU7 triode with Ra = 10k and Ub = 250V:
DDMF phi-L Audio Tube Preamp v2.0.2 x64 x86 VST VST3 AU AAX WiN MAC [FREE] screenshot
Circuit modelingBased on this model, a plate follower stage was implemented.
DDMF phi-L Audio Tube Preamp v2.0.2 x64 x86 VST VST3 AU AAX WiN MAC [FREE] screenshot
Cathode biasingIn this circuit, cathode biasing is used to adjust the bias point of the tube. This is realised by a resistor (Rc) and a capacitor (Cc), placed between the cathode and ground. The effect of cathode biasing can then be modeled by a simple first order RC low pass filter, with Ic*Rc being the input of the filter, and the cathode voltage (Uc) being the output.

If the input signal jumps for example from 0 V to 5 V, the cathode voltage follows quite similar to the step response of a RC-low pass filter:
DDMF phi-L Audio Tube Preamp v2.0.2 x64 x86 VST VST3 AU AAX WiN MAC [FREE] screenshot
Signal limitingThere are two reasons for signal clipping in this circuit. The first one is caused by the tube itself. If there is a high peak at the negative half-wave of the input signal, the tube can’t amplify the signal anymore since the flow of current is completely cut-off. Thus, the positive half-wave of the output is clipped. This effect can be intensified by a more negative bias point.

Here the bias point of an 12AU7 is at around -12 V:
DDMF phi-L Audio Tube Preamp v2.0.2 x64 x86 VST VST3 AU AAX WiN MAC [FREE] screenshotThe second reason for clipping is caused by grid current. High peaks of the positive half-wave of the input signal make the grid voltage positive compared to the cathode voltage. In this case electrons are attracted by the grid. The grid current causes a voltage drop at the internal resistance of the previous stage, which limits the input signal. The following figure shows the effect. The grid voltage is obtained by shifting down the input signal (Uin) by the cathode voltage (Uc). In the upper picture the maximum grid voltage (Ugc) is ~ 0 V compared to the cathode. Hence, there is no grid current. In the lower picture the input signal has an amplitude of 10 V. At the positive peaks of the input signal the grid voltage rises above 0 V (compared to the cathode). The grid current begins to flow and clips the grid voltage.



KUJASHI Soundbank for the RMI Harmonic Synthesizer by Tom Saouz 5 (2)

5 Soundbanks (40 Sounds) für den RMI Harmonic Synthesizer von Tom Saouz

Das Original (RockyMoutainsInstruments HarmonicSynthesizer) von 1974 war sehr selten. Nur 250 Stück wurden je produziert und einsame 4 Stück insgesamt in Europa verkauft.

Bekannteste User waren u.a. Jean-Michael Jarre oder Klaus Schulze, Aphex Twin……

Das RMI Harmonic VSTi ist eine gelungene  Emulation und kann durchaus einige der spezifischen Sounds des Originals wiedergeben. Es verfügt jedoch über u. a. keinen Arpeggiator, Sequencer, Portamento und ist nicht in Mono.

In den Soundbänken findest Du einige “gewaltige” Additiv-Padsounds, Vocal-artiges, einige Keyboard- und Glockenklänge, sehr gute Orgeln, einige SFX, Additive Soloklänge, Sequenzer-Stoff und so einige Retroklänge der 70er Ära.

Zu entpacken sind 5 Fxb-Bänke mit jeweils 8 Sounds (40 Sounds insgesamt).

5 Soundbanks (total amount of 40 Patches) for the RMI Harmonic Vsti by Tom Saouz

The Original was a very rare (only 4 units were sold) and special Synthesizer – a real gem in Additive Synthesis.

It was used by Jean-Michel Jarre and Klaus Schulze, for example.

The RMI Harmonic VSTi is an accurate emulation and could produce some of the original sounds (without the original sequencer).

In my soundbanks you can find huge additive pads, Vocalsounds, some Keys and Bells, many Sequencer-Food, some SFX, for sure really good organs, Additive Leads and a lot of retrosounds from the 70s.

There are 5 banks (8 sounds pro bank) with a total amount of 40 Patches.

Unbedingt vorher mal ins Sounddemo lauschen – somit, was man mit den Klängen anstellen kann. Im Demo verwendet wurden ausschließlich Klänge aus den Soundbänken (außer den Drums) und wurden eingespielt ohne Verwendung externer Effecte (außer einem Sequencer).

Have a good listen to this sounddemo – it shows, what these sounds are made for. Only sounds from the banks were used in this demo (except the drums) and played without the use of external effects (except a sequencer).


For download the banks you have to register in the forum – it´s free!


KUJASHI Soundbank for the SYSTEM ONE D_mv by Kevin Brown 5 (1)

Soundbank (128 Patches) +Drumsound-Bank (31 Patches) für den SystemONE-D_mv  (Buchla 200 series-Emulation) von Kevin Brown

Wer weiß, wie ein Buchla eigentlich klingt? Einfach mal in die Werke von Suzanne Ciani oder Kaitlyn-Aurelia Smith oder auch Alessandro Cortini (Orchesterwerke) reinhören.

Der SystemOneD ist nach Entwicklerangaben (K. Brown) eine Emulation von früheren Buchla-200 series Modulen und ich habe versucht, in diese Modulserie einzutauchen und Klänge “herauszuschälen”.

Herausgekommen ist ein Sammelsurium von “Strange Noises”, Drone-Klängen, Bässen, majestätischen FM-Gebilden, Modularsweeps, Modular-Vocal/FOrmant-Stimmen, Glocken und Keyboardsounds, Buchla typischen Percussionsounds, verrückten Effektklängen und Sequencersounds (der SystemOneD-mv) hat allerdings keinen integrierten Sequencer (daher extern in den Klangbeispielen) sowie Klängen, wie sie wohl nur ein Modularsystem hervorbringen kann.

Außerdem habe ich noch eine kleine Drum/Percussionsoundbank mit 30 Klängen dazuprogrammiert.


A soundbank with 128 patches and a Drumsoundbank with 31 patches for the SYSTEM ONE D_mv by Kevin Brown

SystemOne D_mv is a emulation of the earlier BucHLA 200 Series:

Do U know how a Buchla sounds? Please, listen to the works of Suzanne Cziani or Kaithleen-Aurelia Smith for example.

This synth is a emulation with some modules of the 200e Series of Buchla and I´ve tried to get into the secrets.

I´ve made a whole bunch of sounds – from strange noises to strong Drones, Basses and majestic patches of FM-synthesis, Modularsweeps, Modular Vox, Bells and analog Keys, Buchla typical Percussion, Crazy SFX and Sequencerfood (this synth has no internal Sequencer) and sounds that only a modular synth can generate.
There´s a little bank with Drum & Percussionsounds for any needs, too.

Einfach mal das Sounddemo durchhören, welches zeigt, was man mit den Klängen der Bank (inkl. Drumbank) so anstellen kann. Eingespielt nur mit Klängen aus der Bank (inkl. Drums/Perc) und ohne externe Effekte.

Pleaste, listen to the sounddemo – this shows the usage of the soundbank. Played only with sounds from this banks and without the use of external effects.


For download the banks you have to register and login in the forum, it is free!

Kujashi soundbanks for the TCM-II 5 (3)

256 Patches für den TCM-II (Emulation des ARP 2600) von CESCATO.

Bisher nur auf der FB-Seite des Dev´s zugänglich, hier nun zwei von mir erstellte Soundbänke für den TCM-II. ARP- und Modulartypische Klangexperimente, Leads, SFX, Sequenzen, Glocken und anderes “Geräuschvolles” und für alle zwecke Einsetzbares. Viel Spaß damit!!

256 Patches for the TCM-II (Emulation of the ARP 2600) of CESCATO

Those were only reachable on the site of the dev, but now they´re here:

Two full soundbanks with ARP-2600 and modulartypical sounds: Leads, SFX, Sequences, Soundexperiments, Bells, Keys and all that makes “sound” for all your needs – Enjoy!

Please, listen to those two sounddemos: So you can hear the possibilities and for what these sounds are made for. ALL sounds you hear are made only with patches from these banks and played without the use of external effects.

Zwei Sounddemos, die so einigen Einblick in die Einsatzmöglichkeiten der Patches geben. Alle Klänge ausschließlich mit Patches aus der Soundbank und ohne externe Effekte, eingespielt.

Demo 1:

Demo 2:

For download you have to register or login in the Forum, it is free!