Format: Eurorack
Width: 18HP
Depth: 38mm
Current: 170mA @ + 12V, 170mA @ -12V
Manual PDF (English)
For an overview of the CGM Creative Mixer series and general connection methodsherePlease refer to.
The Frap Tools Quad Stereo Channel (QSC) is a CGM series input section module consisting of four stereo channels. Designed based on the Channel (C) module and incorporating the concepts of the Group (G) and Masterone modules, it is a high-performance stand-alone stereo mixer with a standard CGM configuration or with a monaural effect send. Can also be used as.
The QSC interface also uses the same color scheme as other CGM modules: VCA (red), two FX sends (yellow and green), panning (pink), AUX input (purple), main fader knob (white). ).By utilizing the two local outputs at the top and right of the module, the QSC can also be used as a stand-alone stereo mixer with two monaural FX sends.The panning section also acts as either a stereo source panning or a monaural source crossfader by changing the switch settings.
Each channel has a stereo input VCA, a channel level knob, and two amplitude controls.The input VCA defines the gain of the input signal patched to the channel through the VCA Level knob. CV control is also possible, allowing you to overdrive the circuit with smooth, fat saturation if the signal has sufficient amplitude.The channel level knob sets the volume of the audio signal sent to the group. Like the Channel module (C), the VCA controls the amplitude of the incoming signal and the channel level knob controls the amplitude of the output signal.By combining these two controls, you can define not only the amplitude of the signal in the mix, but also the timbre, much like a classical mixing console.The input VCA can be set about 2 dB higher than the unity gain, so you can add smooth saturation to the input audio.This is often expressed by adjectives such as "thicker, more punchy, warmer".These input levels can also be controlled by a 2-6V or 0-5V unipolar CV signal to the VCA Level CV Input. When the CV signal is patched, the VCA Level knob acts as an attenuator.Reference technique video (Sidechain # 1)
One of the differences between QSC and the Channel module (C) is that it has a local stereo output instead of an independent direct output.This allows you to use QSC as a stand-alone 4-channel stereo mixer.
The QSC has an additional monophonic DC coupling input.This is an audio input that has no signal amplitude control and is very simple to route.The signal to this input is directly added to the group, or the total total routed to the two local outputs.This input is also useful as a spare monochannel for external sources that does not require further amplitude processing.
Two Send Level knobs, yellow and green for each channel, define the amplitude of the signal routed to the group's effect send mono output.All effect sends have a Pre / Post Fader switch that enhances the usefulness of the module. In the Post-fader setting, the amount of signal sent to the external effect is limited by the position of the channel level knob.This setting is useful when you want to keep the dry / wet signal ratio the same when adjusting the volume of a channel. When set to Pre-fader, the effect send is defined only by the Send Level knob or CV and is completely independent of the overall channel level.This method has the effect of lowering the channel level, leaving only the processed signal in the mix. Another view of the Pre / Post effect send is that the former is an absolute level, while the latter is a relative level (in this case, relative to the channel level).The green Send on the leftmost channel and the yellow Send on the rightmost channel can be controlled via a 2-0V or 5-0V unipolar CV signal to their CV input. QSC has a local effect mono output, one for each of the yellow and green Sends.They act like a group's Mono Send and output the sum of the signals defined by the Send Level knobs on the four channels.These outputs allow Mono Sends to be leveraged even on small systems without groups.Reference technique video (Reverb Feedback # 2)
The Pan / Crossfade knob refers to the switch position to perform two different tasks.
Bread
When the Pan / Crossfade switch is in the lower position, the knob acts like a stereo panorama control and determines the balance of the (monaural or stereo) audio signals input to the left and right channels. The two CV inputs control the pan of the left and right channels with the positive / negative (-2V to + 5V) external voltage.As the CV of the positive electrode increases, the signal is distributed to the right, and vice versa for the CV of the negative electrode and the left channel.Since the pan is bipolar controlled, the CV input behaves slightly differently than that of the VCA or effect send.In this case, when the CV is patched to the input, the knob shifts the receiving CV to the positive (right) or negative (left).In other words, it acts as an offset, not as an attenuator.
crossfade
When the Pan / Crossfade switch is in the upper position, the knob acts as a "dual mono" crossfade that blends the patched signal between the two inputs and outputs the same result to the left and right channels.This feature can be used, for example, to blend two output waveforms from an oscillator to create a punchy monaural baseline, or to mix two elements of a drum pattern that don't need to be panned into a stereo image. Convenient.You can also use QSC like a pseudo 2-channel mono mixer by setting all stereo channels to Crossfade.
All channels implement the following three creative controls.
