[Haskell-cafe] [ANN] Csound-expression-5 is out (framework for computer music)

[Anton Kholomiov]

I'd like to announce a new version of Csound-expression library.
It's a framework for computer music production.
It compiles Haskell code to Csound.

What's new?

**The 5.0 is out! New features:**

csound-expression

* **Microtonal tunings**. We can use custom temperaments with insturments,
patches, soundfonts and MIDI-instruments.
   Check out the guide on tuning and microtonal music (see also module
`Csound.Tuning`).
   There are many predefined tunings (including ancient ones).
   Now we can play the authentic Bach music with Haskell!
   See [Custom temperament. Microtonal music](
https://github.com/anton-k/csound-expression/blob/master/tutorial/chapters/Tuning.md
)
   for details.

* **Functions for Csound API**. We can interface with generated code
through many other languages.
   We can generate the code with Haskell and the use it in other
environments. we can build UI with Python or Clojure,
     we can create an Android synthesizer. See the guide section on Csound
API.
     See [Csound API. Using generated code with another languages](
https://github.com/anton-k/csound-expression/blob/master/tutorial/chapters/CsoundAPI.md
)
     for details.

* **Padsynth algorithm** (need Csound 6.05). There are functions that makes
it easy to use wonderful PADsynth algorithm,
    This algorithm is designed to make "alive" instruments, natural pads.
    There are not only function that explore the algorithm but also new
PAtches in the
    package csound-catalog that are based on it! See the section in the
guide on the PADsynth.
    Lot's of padsynth instruments are mode with morphing support. We can
crossfade between 2 or even 4 timbres.
    See [Padsynth algorithm](
https://github.com/anton-k/csound-expression/blob/master/tutorial/chapters/Padsynth.md
)
    for details.

* **Argument modifiers** make it very convinient to modulate the rguments
(apply vibrato to frequency
   or add some randomness to the parameter). See [Arguments modulation](
https://github.com/anton-k/csound-expression/blob/master/tutorial/chapters/ModArg.md
)
   for details.

* The **hard clipping** was substituted with **limiter**. There should be
no distortion when
   amplitude goes higher than `0dbfs` value.

* Adds **Ping-pong delay** implementation. See function `pingPong` at the
module `Csound.Air.Fx`.

* Adds Rory Walsh's brand **new analog filters** (need Csound 6.07). See
functions `alp1`, `alp2` and `alp3` at the module `Csound.Air.Filter`.

* Bugfixes for `mixAt` function. Now it doesn't duplicates the
effectful-code.
   Now `mixAt` is not a function that is based on class `At`. It becomes
   a method in it's own class called `MixAt`. That fixes the code
duplication problem.

csound-catalog

* **new instruments** that are based on **PADsynth algorithm**. Check out
`Csound.Patch`
   at the section on PADsynth Sharc instruments. There are new deep
spiritual vedic pads
   (vibhu, rishi, agni, prakriti, rajas, avatara, bhumi).
   See [Padsynth algorithm](
https://github.com/anton-k/csound-expression/blob/master/tutorial/chapters/Padsynth.md
)
    for details.


Link to the library: http://hackage.haskell.org/package/csound-expression
Github repo:  https://github.com/spell-music/csound-expression

You can listen to some PADsynth instruments  at the link:
https://www.dropbox.com/s/pqn4dkvoo01dome/ce-5.zip?dl=0

Cheers,
Anton
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