spell-music/csound-expression

The 5.2 is out. Virtual pedalboards, arrays, new OSC, full support for mono synthesizers, patch skins, all GEN-routines are implemented

New features:

• Complete support for monophonic synthesizers:

  • The argument of mono synth was updated.

    Previously it was a pair of amplitude and frequency signals.
    But this representation doesn't captures the notion of note retrigger.
    We can not create the mono-synt with sharp attacks.

    Now this is fixed. We can use adsr140 or adsrMonoSynt functions to create
    mono synths with fixed attacks

  • monoSco - for playing scores with mono-synths

  • monoSched - for playing event streams with mono synt

  • atSco and atSched now work for mono synth too

• The patch can change the skin. The Patch type has changed. Know it supports the change in common parameters.
  Right now the ccommon parameters include only Low-pass filter type. But this can be extended in future releases.

  The idea is that we can parametrize the patch with some common arguments so that use can tweak them
  without revriting the algorithm.

  The low-pass filter is a vital tool that defines the character of the synthesizer.
  With recent addition of several modern filter emulators (like Korg (korg_lp), or acid filter diode)
  it's good to be able to quickly switch the filters. We can do it for patches with function

   setFilter :: ResonFilter -> Patch a -> Patch a

• Family of standard effects was added (see module Csound.Air.Fx.FxBox and the guide).
  The effects are kindly provided by Iain McCurdy (recoded from his original implementation in Csound).

  The effects have catchy names and are defined on wide variety of types. Let's briefly discuss the naming conventions:

  • adele - analog delay

  • pongy - ping pong delay

  • tort - distortion

  • flan - flanger

  • fowler - Envelope follower

  • phasy - phaser

  • crusher - bit-crusher

  • chory - stereo chorus

  • tremy - tremolo

  • pany - panning

  • revsy - reverse playback

    Also there are set of presets that imply the notion of add a bit of effect or add a lot of effect.
    They are suffixed with number from 1 to 5. Like flan1 or tort3. Also if the effect support the
    tone knob (center frequency of LP filter) ter are suffixes b for bright color and m for muted color.
    For example tort2m or adele2b.

The effects are just functions from signals to signals:

~~~haskell
dac $ hall 0.2 $ adele2 0.5 0.25 $ flan2 $ tort1m $ asigs
~~~

• UI widgets for standard effects.

  Alongside with effects there are functions to create widgets (UI-controls). They have the same naming convention
  only the prefix ui is added. For example: uiTort, uiAdele or uiHall. Also there are predefined presets like uiFlan2 or uiPhasy3.
  With presets we put the box in the initial state corresponding to the given preset. But lately we can change it with UI-controls.

  With this feature paired with functions fxHor, fxVer and fxGrid we can easily design our virtual pedalboards.

  It can be used like this:

    > let pedals = fxGrid 2 [uiFlan1, uiTort1, uiAdele2m 0.5 0.3, uiHall 0.25]
  
    > dac $ fxApply pedals $ (sawSeq [1, 0.5, 0.25] 2) * sqr 220

• Complete list of GEN routines. This release adds GEN:

    * 25 bpExps --  Construct functions from segments of exponential curves in breakpoint fashion., 
  
    * 27 bpLins --  Construct functions from segments of straight lines in breakpoint fashion.
  
    * wave waveletTab -- Generates a compactly supported wavelet function.
  
    * farey fareyTab -- Fills a table with the Farey Sequence Fn of the integer n.
  
    * sone soneTab -- Generate a table with values of the so