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Calf studio gear

The Calf studio gear package contains a lot of instruments and plugins for your LINUX home-, project- or production-studio.

Please note:

Due to ongoing development the screenshots and descriptions may not represent the current state.


Synthesizer IconInstruments

  • Calf - Organ - Tone Generator
  • Calf - Organ - Sound Processor
  • Calf - Organ - Advanced

Calf Organ

A versatile organ/pad synthesizer, capable of producing many types of sounds:

  • tonewheel organs (up to 9 drawbars)
  • solid state organs (9 independent oscillators with many waveforms to choose from, individual panning, phase shift and detune for each oscillator)
  • strings-like or choir-like pads (thanks to a set of long looped samples generated using padsynth algorithm invented by Nasca Octavian Paul)
  • fat basses and searing leads

The sound from some or all oscillators can be processed using 2 independent (but connectable) filter sections, controlled by up to 3 ADSR envelopes. A vibrato/chorus/phaser section makes the sound more vivid.

Development: Krzysztof Foltman
Sample generation algorythm: Nasca Octavian Paul

  • Calf - Monosynth - Audio Path
  • Calf - Monosynth - Modulation
  • Calf - Monosynth - Modulation Matrix

Calf Monosynth

Simple monophonic synthesizer with 2 oscillators, multimode filter and an envelope. Designed to maximize flexibility while minimizing the number of controls. Useful for synth basses and leads.

Development: Krzysztof Foltman

Modulation IconModulation effects

  • Calf - Multi Chorus

Calf Multi Chorus

Multi-tap stereo chorus with adjustable number of voices. Adds warmth and richness, especially if you give it a lot of CPU power. A lot of options make this effect highly flexible in expression.

Development: Krzysztof Foltman

  • Calf - Phaser

Calf Phaser

A pretty basic stereo phaser with all typical settings (center frequency, modulation depth, LFO rate number of stages, feedback, amount, L-R LFO phase difference and amount). Provides a LFO reset button for consistent song playback. The number of stages goes up to 12.

Development: Krzysztof Foltman

  • Calf - Flanger

Calf Flanger

Simple stereo flanger with linear interpolation. If "zipper noise" of basic flanger effects is driving you mad, try this one!

Development: Krzysztof Foltman

  • Calf - Rotary Speaker

Calf Rotary Speaker

Work in progress (read: still sounds rather boring). Can morph between slow and fast mode when switched using MIDI, control ports or automation.

Development: Krzysztof Foltman

  • Calf - Pulsator

Calf Pulsator

Calf Pulsator is something inbetween an autopanner and a tremolo, but it can produce funny stereo effects as well. Pulsator changes the volume of the left and right channel based on a LFO (low frequency oscillator) with different waveforms and shifted phases.

Development: Markus Schmidt, Krzysztof Foltman

Delay IconDelay effects

  • Calf -Reverb

Calf Reverb

Simple reverb with basic controls and relatively neutral sound. No dreaded metal barrel sound, but at the expense of higher CPU use and less time density. Like most artifficial reverberators, it is not suitable for every instrument, but try it on vocals, guitars or Calf synths, and you will like it.

Development: Krzysztof Foltman

  • Calf - Vintage Delay

Calf Vintage Delay

A very simple simulation of tape echo, with a filter in a feedback loop and BPM-based time setting. The number of controls is limited, but all the essential stuff is there. Suitable for synths, guitars and almost anything else.

Development: Krzysztof Foltman

  • Calf - Compensation Delay Line

Calf Compensation Delay Line

Compensation Delay Line is a metric based delay to compensate differing positions of microphones or speakers.

Development: Vladimir Sadovnikov

Dynamics IconDynamics

  • Calf - Compressor

Calf Compressor

Smooth sounding dynamic compressor with a variety of settings, written by Thor Harald Johansen. RMS/peak modes, A-weighting, metering - feels like real studio gear!

Development: Thor Harald Johansen, Krzysztof Foltman

  • Calf - Sidechain Compressor

Calf Sidechain Compressor

Based on Thor's compression routine, the Calf Sidechain Compressor is the universal tool for any problem concerning sound dynamics. A highly flexible filter stage in the sidechain lets you eliminate dynamic rumbling, clipping sibilants and similar disturbances. The sidechain offers split modes, too.

Development: Markus Schmidt, Thor Harald Johansen

  • Calf - Multiband Compressor

Calf Multiband Compressor

The first multiband compressor with real plugin capabilities on linux audio worksations - four channels with separate compression stages will blow up the loudness of your tracks. This one is also based upon Thor's compression routine.

Development: Markus Schmidt, Thor Harald Johansen

  • Calf - Deesser

Calf Deesser

Due to it's flexibility in sound and options Thor's compressor constitutes the core of Calf Deesser. An optimized filter stage in the sidechain gives you great control over dynamic highs. This deesser offers a split mode for special purposes.

Development: Markus Schmidt, Thor Harald Johansen

  • Calf - Gate

Calf Gate

Because of the flexibility of Thor's compression detection we were able to use it as a solid base for a noise gate. The controls may seem a bit unusual but they provide high flexibility in detecting and eleminating your noise floor - Calf Gate bites off your sustain!

Development: Damien Zammit, Krzysztof Foltman

  • Calf - Sidechain Gate

Calf Sidechain Gate

The same flexible sidechain filter stage that is used in the Calf Sidechain Compressor turns Calf Gate into a very precise gating plugin. Especially in drum recordings Calf Sidechain Gate offers complete control over the audibility of your drums. You want to cut away the complete lower end of a playback leaving the bassdrum where it is - a split mode makes it happen.

Development: Markus Schmidt, Damien Zammit

  • Calf - Multiband Gate

Calf Multiband Gate

Four channels with separate gate stages provide enough flexibility to clean up really problematic material like a humming and noisy narrator. This one is also based on Damien Zammit's gate routine.

Development: Markus Schmidt, Damien Zammit

  • Calf - Limiter

Calf Limiter

The broadband Limiter included in the Calf suite uses lookahead technology to smoothen the gain reduction process while preventing your signals from rising above the selected threshold.

Development: Christian Holschuh, Markus Schmidt

  • Calf - Limiter

Calf Multiband Limiter

The Multiband Limiter brings presence, punch and loudness to your mix. Combined with the Multiband Compressor Calf is a good choice for mastering your material to a professional level. The weighting of single bands prevents certain ranges of the signal from being cut off or pressed to the background.

Development: Markus Schmidt, Christian Holschuh

  • Calf - Transient Designer

Calf Transient Designer

Transient Designer is used to modify the envelope of percussive signals (signals with a defined attack or transient) like drum sounds or percussion instruments. It is able to remove or to boost the attack or the release of a signal independent from its real gain in contrast to the operation of compressors or expanders. The Calf Transient Designer is able to add a defined sustain phase to the signal.

Development: Christian Holschuh, Markus Schmidt

Filters IconFilter and equalizer

  • Calf - Filter

Calf Filter

Selectable 12dB/24dB/36dB rolloff, lowpass or highpass with inertia/smoothing for cutoff for more "analog" sound when tweaking. Particularly useful for drum loops or guitars in house music.

Development: Krzysztof Foltman

  • Calf - Filterclavier

Calf Filterclavier

This filter is controllable via MIDI and follows the received Note-On signals with its frequency settings.

Development: Hans Baier

  • Calf - Equalizer - 5 Band

Calf 5-Band Equalizer

Based on different filters these series of equalizers was invented to provide some specialized tools for everyday's signal processing. A gain of +-36dB and maximum slew rates for the peak filters offer great flexibility for eliminating or creating resonances and shaping your frequency range. All bands are capable of processing stereo, left, right, M-S mid or M-S side individually. This version offers two shelving filters and 3 peak filters. It's the right choice for some minor frequency range adjustments.

Development: Markus Schmidt, Krzysztof Foltman

  • Calf - Equalizer - 8 Band

Calf 8-Band Equalizer

Based on different filters these series of equalizers was invented to provide some specialized tools for everyday's signal processing. A gain of +-36dB and maximum slew rates for the peak filters offer great flexibility for eliminating or creating resonances and shaping your frequency range. All bands are capable of processing stereo, left, right, M-S mid or M-S side individually. This version offers a low and a high pass, two shelving filters and 4 peak filters and is the perfect replacement of a channel strip EQ.

Development: Markus Schmidt, Krzysztof Foltman

  • Calf - Equalizer - 12 Band

Calf 12-Band Equalizer

Based on different filters these series of equalizers was invented to provide some specialized tools for everyday's signal processing. A gain of +-36dB and maximum slew rates for the peak filters offer great flexibility for eliminating or creating resonances and shaping your frequency range. All bands are capable of processing stereo, left, right, M-S mid or M-S side individually. This version offers a low and a high pass, two shelving filters and 8 peak filters and is designed to handle the real problems.

Development: Markus Schmidt, Krzysztof Foltman

Distortion IconDistortion effects

  • Calf -Saturator

Calf Saturator

Universal distortion tool. Saturator can act as a guitar distortion as well as a harmonics generator. Some useful filters before and after the distortion stage and gapless adjustment between 2nd and 3rd harmonics give you a great flexibility in sound. The saturation stage is taken from Tom Szilakyi's TAP-plugin pack.

Development: Tom Szilagyi, Markus Schmidt

  • Calf -Exciter

Calf Exciter

Filtered distortion to add brilliance to your tracks. The saturation stage is taken from Tom Szilakyi's TAP-plugin pack.

Development: Markus Schmidt, Tom Szilagyi

  • Calf -Bass Enhancer

Calf Bass Enhancer

Harmonics for fattening the lower end. The saturation stage is taken from Tom Szilakyi's TAP-plugin pack.

Development: Markus Schmidt, Tom Szilagyi

  • Calf - Tape Simulator

Calf Tape Simulator

Calf Tape Simulator modifies signals as if they were recorded on a tape machine or tape deck. It is able to simulate different aspects of magnetical recordings like loss of brilliance, noise, softer transients, distortion/compression of the signal and mechanical tape threading path problems.

Development: Markus Schmidt, Christian Holschuh

Tools IconTools

  • Calf - Mono Input

Calf Mono Input

Since Calf doesn't provide mono versions of the plugins yet, it is essential to split your signal into stereo signals when used in an audio production environment like Ardour. The Mono Input has some useful funtions to deal with the split process like phase inversion and balance.

Development: Markus Schmidt

  • Calf - Stereo Tools

Calf Stereo Tools

This device is a toolbox for handling stereo signals. It is able to change M/S microphone signals to L/R and vice versa. Switching the phase, muting a channel, widening the stereo base or delaying one of the channels up to 20ms are some of the features of this input or mastering tool.

Development: Markus Schmidt

  • Calf - Analyzer - Line Graph
  • Calf - Analyzer - Bars
  • Calf - Analyzer - Spectralizer
  • Calf - Analyzer - Stereo Image

Calf Analyzer

The FFT-Analyzer of this package has a frequency domain display and a goniometer. The frequency chart displays its information from various input modes like L/R, Average or Stereo; it can draw lines or bars, logarithmic or linear graphing. Various output modes like Stereo Image, Stereo Difference and even a Spectralizer with temporal domain are available. Lots of options provide full control of the way the signal is processed and rendered.

Development: Markus Schmidt, Christian Holschuh