Posts Tagged 303

Doepfer MS-404 review

Doepfer  MS 404

The Doepfer MS404 was designed as a TB emulator with a lot of added features in a period  full of cheap and expensive tb clones.
The 404 in fact is not a clone but has a clear personality and can be considered more a single VCO monosynth.

First I want to describe the structure of the synth: a single VCO , with saw/pulse/PWM or noise with a 24dB ladder filter, a VCA with accent and a adsr Envelope generator and two indipendent LFO that can go up to audio frequency!

The VCO seems to be the A110 “standard vco” available as a module for the A100 modular system, but opening the case , I read on the board “HI END VCO”,and that sounds strange because I did not see any CEM3340 as on the A111 “hi end VCO”.
The VCO section has 5 knobs and 3 swithches.
Knobs are: GLIDE, TUNE (fine tune) , LEVEL (LFO1 amount) FREQ (LFO1 rate).
the switches select:

  • saw/pulse/none
  • vco/noise/none
  • pwm/fm/none
  • rate (hi-mid-low)

The VCF section has 5 knobs :

  • Frequency
  • Envelope
  • Modulation level(LFO2)
  • Modulation Frequency (LFO2)
  • Emphasis (Resonance)

and 2 switches : one for the filter tracking and omne for the LFO2 range (hi-mid-low).
The VCF is the same as the A120 MOOG ladder filter eurorack module for the A100.

The VCA has a knob control for the accent amount and the envelope is the classic adsr.

speaking about the sound the 404 has a distinct doepfer carachter, it sounds exactly as the A100 modular system, no audible differences.
The synth behaves as a tb clone if the added features are not used, and with the emphasis quite low.
When you rise the emphasis it takes squelching in a more hard way and at self oscillation it can produce a sine wave , musically playable switching the filter tracking ON.
the PWM sounds awesome, I like it very much, because it does not intend to clone but has a “new minimal sound” very interesting for those involved in minimal techno like Ritchie Hawtin…
It does not sound nor similar to a Roland SH-101, this is more acid and hard, the SH is fuller on low frequencies and smoother.
The interesting feature that makes the doepfer  ms 404 a distinct machine is the use of fast lfo to modulate VCO and VCF.

The LFOs are derived from the A145 (doepfer A100 system) and have a range switch that allows very low oscillation to fast audio range FM.
That’s interesting because the filter is a 24dB Moog Ladder type, a filter that has a fast reaction to modulations and can create incredibles sounds if modulated in self oscillation or nearby…
Using the other LFO on the VCO can create some interesting noise or FM sounds useful for percussions, drones etc.
One thing to say…
The waveform orf the LFOs are fixed, triangle or square and you can choose the one you want to use only using a jumper on the board, there are no external switches.

The impression I had playng the MS 404 is really good.
This is a interesting bassline synth , not so good at emulating the classic TB sound, but this is a good point!
Other than that can be used as a classic monosynth with a great modulation capability, and many sounds with a small amount of functions and knobs.

There is also an audio in (with gain) to process external audio signals  and a cv-gate interface (in/out) so the 404 can be played trhu cv by an analog system/sequencer or can be used to control other cv-gate synth.

I prefer the 404 to a Basstation , for example ,  it sounds more interesting and “analog” and is not the “wannabe everything” emulator.

ms404 schematics

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Roland TR 606 videos

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Roland MC 202 waveforms

The waveforms of the Roland MC202 at the oscilloscope.
The background noise / aliasing is generated by the youtube compression.

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Acidlab Bassline video

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Eurorack vs Roland System-100 audio demos (part2)

MFB OSC 02

MFB OSC 02

Yesterday I tested the MFB VCO and the MFB Dual ADSR with my Roland System100 mod 102, during the test I did some demo recordings.
The demos are quite long and in every demo I used the same “sequence” and tweaked the knobs to let you hear the behaviour of the system.
As the melody is quite redundant  I hope you don’t get annoyed and focalize your attenction on the sounds.

  • VCO MFB with Roland filter
    The MFB VCO (only one vco) passes trhu the Roland System100  filter.
    First I use a saw wave then a square without any modulation and play with the filter to show as the the two modules interact.
  • VCO MFB with System100 and MFB Dual ADSR
    The MFB VCO pass thru the Roland filter and the MFB env modulates the Roland filter cutoff.
    It starsts with a saw wave , than at 1’30 I switch to the PWM and continue playing with the filter and with the MFB env.
    At 4’50 I turn the Roland VCO volume up…
  • VCO PWM (Roland System100 vs MFB)
    Here’s a comparison between the two vco passing thru the Roland System100.
    They both produce the PWM with a similar rate, the MFB sounds a bit harder, it may need an attenuator for PW mod…
    The first is the Roland and the second is the MFB

PAY ATTENCTION!!
When you listen to the sound keep the volume at a fixed level, don’t turn up the volume when some sounds seem more quiet because there are some resonance peaks that can DAMAGE your speakers and your EARS!

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Acidlab Bassline – everybody needs the acid box!

Acidlab Bassline

Acidlab Bassline

This little alluminium box, absolutely handcrafted, comes from Germany as a clone of the famous TB-303.
Acidlab is Klaus Süßmuth, a tech head  famous for his 303 modding, ith the Bassline he creates from zero a TB-clone with some variations…
let’s see the differences!

The incredible sound of the TB-303 is created by particular elements:

  • The FILTER has no normalization , so as the resonance goes up , as the filter start to growl in that acid way…
  • The GLIDE is programmable (and it creates a slide like the legato does but with fixed time)
  • The ACCENT is a really “playable” part of the synth as it creates a “tenuto”on the selected note and and the decay get disabled for that step, and get the filter to open and the rises up the Volume.
  • The Sequencer programming is not so easy as it seems and often leads to strange ipnotic sequences.

The Acidlab Bassline has an identical structure for the synth, with the same knobs and functions, while the sequencer is not the same as on the 303.
The knobs are really good and act smooth , they invite you to twist the sound!

The sequencer works in a different way, first it has a 8-12 selector to choose if you want a 16th note pattern or a 12th.
You cannot chhose the lenght (step ) of the pattern, for example 9 steps.

The programming is really particular because here there’s no minikeyboard, a knob switch is used to choose the note, you hit play and the bassline lets you hear the note selected, then you select accent and/or glide and /or 1octave upand than press next to go to the following step.
With this method you can get, with a bit or a lot of “randomness”, really interesting sequences without having the situation too much undercontrol.
Another difference from the 303 is that the sequencer does not change pattern at the end of the loop, but jumps immediately in the selected pattern.
This can be a creative tool to mix several pattern togheter making more complex melodies, but it’s not possible to compose a chain of pattern in song mode or something realtime like a chain of pattern.
Another interesting add is that the sequencer can drive external analog synths with cv-gate outs and can be syncronized to older machines with din sync and to a daw or midi sequencer thru midi, always with a perfect timing.

Analizing the “sound” of the Acidlab , the knobs are the same as the 303 but this machine has a kind more aggressive carachter.
It sound quite mellow when the resonance is absent, and with the filter closed can do amazing subs, while as we turn up the resonance it became acid more and more aggressive but when the reso overflow the 75% it starts sounding more industrial than the classic TB.
To change the behaviour of the resonance there is a trim pot on the rear to adjust the response , to be similar to the orginal or to have more reso.

The machine can really sound close to the original but has even its own carachter and that’s the reason why I like it!
The strange sequencer is really interesting and when you ‘ve got deep into the way it works it will be an “exclusive” creative tool.

ACIDLAB.DE

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Squarepusher played with Roland MC-202

“Theme from Hernest Borgnine” by squarepusher played on the Roland MC-202

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