90,00 € + VAT
The 321 is a multi-purpose utility module for high-quality audio and CV processing.
It consists of three sections, each capable of scaling a signal, inverting it, and adding a positive or negative offset.
The signals feed two summing stages: one for all the sections and another that excludes from the sum those sections whose output socked has a plugged cable.
It can process both CV and audio signals: the sum borrows its design from our popular CGM series and guarantees transparent amplification and sum, with two -6 dB switched to attenuate the summed signal and gain extra headroom.
When nothing is patched, each section can output a plain DC offset.
The 321 features a DC-Coupled amplifier that can attenuate or amplify audio and CV. It can add up to 6dB (or double a signal level).
A switch flips the phase of an audio source or inverts the values of a control voltage. The combination of switch and attenuator instead of an attenuverter allows you to precisely reach the 0 and completely mute a channel.
The Offset section allows to add or subtract a DC offset to the incoming signal. It is excellent to make unipolar signals bipolar or vice-versa. A switch can disable the offset completely to guarantee a more transparent audio treatment.
When no signal is patched to a section, its Offset control allows you to output a steady voltage. It can be either positive or negative, according to the Offset knob position.
The 321 has three independent circuits, each of which can scale, flip, and shift an audio or CV signal.
Two outputs at the top provide two different sums. The right one outputs all the three sections, including potential offsets, while the left one outputs just the sections that aren’t using their local outputs. You can use a dummy cable patched to a section’s output to remove it from the Unpatched output sum.
Both sum outputs feature a -6dB switch that can halve the output amplitude whenever the sum is too hot.
|15,6 × 6 × 6 cm
48 mA @ +12 V
48 mA @ -12 V
Recommended warmup time
DC to 19 KHz
More details on the Manualone.
We have two main kinds of capacitors.
The first one is necessary to AC-couple the audio signal: they prevent any unwanted DC offset, and they offer protection against wrong connections. For this reason, you can patch nearly every input to every output, and the worst thing that can happen is some pops or some silence.
The second one is power filters to guarantee a cleaner current flow across the case. They might sound a bit over the top, but we must remember that a Eurorack system is not something that comes straight out of the factory. Instead, every Eurorack setup is unique and may change according to the musician’s need. For this reason, we want to add as much protection as we can, both to avoid issues with our modules and to ensure that even the other modules behave correctly. We use a wide mix of capacitors in our modules: ceramic, electrolytic, tantalum, and multilayer. They can be assembled thru-hole or SMD, according to what gives the best balance between result and space. For example, all the electrolytic capacitors are mounted thru-hole because they perform better according to our tests.
However, the capacitors have zero impact on the power draw, on which you can read in this other FAQ.
Power draw should always be related to what a module does.
Generally speaking, there are modules like SAPÈL that undoubtedly consume more than other random generators. However, SAPÈL is a double module, so a fair comparison would be between it and a pair of similar modules. The same can be said for FUMANA, the most power-demanding filter bank. However, it is also the only Eurorack filter bank with 32 analog bandpass filters, half of which have a 48 dB/oct slope. So, also in this case, a fairer comparison would be between FUMANA and TWO other 16-band filter banks, which leads to similar power consumptions.
More in detail, we engineer our modules to be safe to use. To protect both the modules and the rest of the case, we add a proper buffering stage to every input and output: even if a single buffer doesn’t draw that much power, all the ins and outs piled together can significantly impact the final power draw.
In Europe, we sell exclusively through our distributor: we do not have access to the individual shops’ orders or stocks.
In the rest of the world, we sell directly to the shops, but even in that case, there’s no way for us to know whether the modules that we’re restocking are sold, available, or reserved for another customer.
We restock every module at least once over a year: we focus on a module’s batch at a time, then we move on to the next one, and so on.
If you want an estimated delivery time for a specific module, drop us a line! We’ll be happy to answer you.