Alas there is no CsdSco typeclass anymore. The original idea was to implement score type with the most basic type and give the user a chance to write converters and use score playing functionality by the class CsdSco. But I've noticed that this approach was preventing me from using advanced score structures (they are implemented in the separate package). And type signatures become scary for the novice. So I've settled down the type. It's like choosing between Prelude.List ListLike.List. I've decided to pick the simplest one. You can write your own converter to the `Sco` type. ```` type Sco a = Track http://hackage.haskell.org/package/temporal-media-0.6.0/docs/Temporal-Media.... D http://hackage.haskell.org/package/csound-expression-4.8.2/docs/Csound-Types... a ``` The `Track` comes from temporal-media package. It's very easy to construct it from list of events. One possible solution: ``` type Note = (Double, Double, a) fromEvents :: [Note] -> Sco a fromEvents = har . fmap f where f (start, duration, a) = del (double start) $ str (double duration) $ temp a ``` Notice the need for converting to csound doubles (`D`s). The `har` is parallel composition. `del` is for delaying nd `str` is for stretching in time domain. `temp` creates an event that lasts for one seconds and starts right away. I don't know your type, but I think it can be rendered to a list of notes. Then you can plug the converter to the functions: `sco` or `atSco` (used for patches). Cheers, Anton 2015-09-15 22:11 GMT+03:00 Edward Lilley :

Hi

The most useful part of this (for me) is the ability to play midi-style instruments at arbitrary frequencies, so this looks great!

To that end, I'm looking for the definition of the 'CsdSco' typeclass, as I want to write my own instance. It seems to be referenced in the csound-expression documentation, and once in a code comment, but is otherwise absent from the source. Indeed, installing temporal-csound from hackage fails with the error

src/Csound.hs:135:10: Not in scope: type constructor or class ‘CsdSco’

Where do I find it?

thanks, Edward

Anton Kholomiov writes:

...

Status update for my haskell synth csound-expression. The main point is presence of many cool instruments. They are implemented in the package csound-catalog. All packages are compiled with GHC-7.10 So the hackage fails to build them and unfortunately docs a broken too. But you can look at the source code of the module Csound.Patch to now the names of the instruments. The usage is pretty straightforward. It's described here:

https://github.com/spell-music/csound-expression/blob/master/tutorial/chapte...

...

There is an mp3 file to listen to the instruments.

http://ge.tt/1jNETqN2/v/0

...

*The 4.8.3 is out! New features:*

This is a very important release to me. It tries to solve the problem present in the most open source music-production libraries. It's often

...

pack of beautiful sounds/timbres is missing. User is presented with many audio primitives but no timbres are present to show the real power of the framework. This release solves this problem. See the friend package csound-catalog on Hackage. It defines 200+ beautiful instruments ready to be used.

The csound-expression defines a new type called Patch for description of an instrument with a chain of effects. It's good place to start the journey to the world of music production.

There are new functions for synchronized reaction on events. The

the triggering

...

of events can be synchronized with given BPM.

The library is updated for GHC-7.10!

github repo: https://github.com/spell-music/csound-expression

hackage: http://hackage.haskell.org/package/csound-expression

Cheers!