我刚刚开始使用Overtone，但是我想从一开始就使事情保持井井有条。
project.clj:
(defproject overtone-sketchbook "0.1.0-SNAPSHOT"
:dependencies [[org.clojure/clojure "1.5.1"]
[overtone "0.9.1"]])
src/overtone_sketchbook/synths.clj: (ns overtone-sketchbook.synths
(:use [overtone.live]))
(definst pluck-saw [f 800 d 3]
(* (saw (+ 100 (* 200 (saw d))))
(pluck (* (white-noise)
(env-gen (perc 0.001 2) :action FREE))
1 3 (/ 1 f))))
REPL会议1:
> lein repl
nREPL server started on port 52425
REPL-y 0.2.0
Clojure 1.5.1
Docs: (doc function-name-here)
(find-doc "part-of-name-here")
Source: (source function-name-here)
Javadoc: (javadoc java-object-or-class-here)
Exit: Control+D or (exit) or (quit)
user=> (use 'overtone.live)
--> Loading Overtone...
**********************************************************
WARNING: JVM argument TieredStopAtLevel=1 is active, and may
lead to reduced performance. This happens to currently be the
default lein setting:
https://github.com/technomancy/leiningen/pull/1230
If you didn't intend this JVM arg to be specified, you can turn
it off in your project.clj file or your global
~/.lein/profiles.clj file by adding the key-val
:jvm-opts ^:replace []
**********************************************************
--> Booting internal SuperCollider server...
Found 0 LADSPA plugins
*** ERROR: open directory failed '/Users/ilya/Library/Application Support/SuperCollider/synthdefs'
Number of Devices: 2
0 : "Built-in Input"
1 : "Built-in Output"
"Built-in Input" Input Device
Streams: 1
0 channels 2
"Built-in Output" Output Device
Streams: 1
0 channels 2
SC_AudioDriver: sample rate = 44100.000000, driver's block size = 512
--> Connecting to internal SuperCollider server...
--> Connection established
_____ __
/ __ /_ _____ _____/ /_____ ____ ___
/ / / / | / / _ \/ ___/ __/ __ \/ __ \/ _ \
/ /_/ /| |/ / __/ / / /_/ /_/ / / / / __/
\____/ |___/\___/_/ \__/\____/_/ /_/\___/
Collaborative Programmable Music. v0.9.1
Hey Ilya, I feel something magical is only just beyond the horizon...
nil
user=> (demo overtone-sketchbook.synths/pluck-saw)
IllegalArgumentException Don't know how to create ISeq from: clojure.lang.Symbol clojure.lang.RT.seqFrom (RT.java:505)
user=> (use 'overtone-sketchbook.synths)
nil
user=> (demo overtone-sketchbook.synths/pluck-saw)
IllegalArgumentException Don't know how to create ISeq from: clojure.lang.Symbol clojure.lang.RT.seqFrom (RT.java:505)
user=> (demo pluck-saw)
IllegalArgumentException Don't know how to create ISeq from: clojure.lang.Symbol clojure.lang.RT.seqFrom (RT.java:505)
user=> (require 'overtone-sketchbook.synths)
nil
user=> (demo pluck-saw)
IllegalArgumentException Don't know how to create ISeq from: clojure.lang.Symbol clojure.lang.RT.seqFrom (RT.java:505)
user=> (demo overtone-sketchbook.synths/pluck-saw)
IllegalArgumentException Don't know how to create ISeq from: clojure.lang.Symbol clojure.lang.RT.seqFrom (RT.java:505)
user=> Bye for now!
REPL会议2:
> lein repl
nREPL server started on port 52100
REPL-y 0.2.0
Clojure 1.5.1
Docs: (doc function-name-here)
(find-doc "part-of-name-here")
Source: (source function-name-here)
Javadoc: (javadoc java-object-or-class-here)
Exit: Control+D or (exit) or (quit)
user=> (use 'overtone-sketchbook.synths)
--> Loading Overtone...
**********************************************************
WARNING: JVM argument TieredStopAtLevel=1 is active, and may
lead to reduced performance. This happens to currently be the
default lein setting:
https://github.com/technomancy/leiningen/pull/1230
If you didn't intend this JVM arg to be specified, you can turn
it off in your project.clj file or your global
~/.lein/profiles.clj file by adding the key-val
:jvm-opts ^:replace []
**********************************************************
--> Booting internal SuperCollider server...
Found 0 LADSPA plugins
*** ERROR: open directory failed '/Users/ilya/Library/Application Support/SuperCollider/synthdefs'
Number of Devices: 2
0 : "Built-in Input"
1 : "Built-in Output"
"Built-in Input" Input Device
Streams: 1
0 channels 2
"Built-in Output" Output Device
Streams: 1
0 channels 2
SC_AudioDriver: sample rate = 44100.000000, driver's block size = 512
--> Connecting to internal SuperCollider server...
--> Connection established
_____ __
/ __ /_ _____ _____/ /_____ ____ ___
/ / / / | / / _ \/ ___/ __/ __ \/ __ \/ _ \
/ /_/ /| |/ / __/ / / /_/ /_/ / / / / __/
\____/ |___/\___/_/ \__/\____/_/ /_/\___/
Collaborative Programmable Music. v0.9.1
Hello Ilya, may algorithmic beauty pour forth from your fingertips today.
nil
user=> pluck-saw
#overtone.studio.inst.Inst{:name "pluck-saw", :params ({:value #<Atom@24fc9cde: 800.0>, :name "f", :default 800.0, :rate :kr} {:value #<Atom@449ec5ca: 3.0>, :name "d", :default 3.0, :rate :kr}), :args ("f" "d"), :sdef {:name "overtone-sketchboo96d/pluck-saw", :constants [0.0 0 2.0 3.0 0.5 1.0 50.0 100.0 200.0 1 2 -99 -4 5 0.001], :params (800.0 3.0), :pnames ({:name "f", :index 0} {:name "d", :index 1}), :ugens ({:n-inputs 0, :args nil, :outputs ({:rate 1} {:rate 1}), :name "Control", :rate 1, :n-outputs 2, :rate-name :kr, :inputs (), :special 0, :id 280} #<sc-ugen: saw:ar [1]> #<sc-ugen: binary-op-u-gen:ar [2]> #<sc-ugen: binary-op-u-gen:ar [3]> #<sc-ugen: saw:ar [4]> #<sc-ugen: white-noise:ar [0]> #<sc-ugen: env-gen:kr [0]> #<sc-ugen: binary-op-u-gen:ar [2]> #<sc-ugen: binary-op-u-gen:kr [1]> #<sc-ugen: pluck:ar [5]> #<sc-ugen: binary-op-u-gen:ar [11]> #<sc-ugen: out:ar [12]>)}, :group #<synth-group[live]: Inst pluck-saw Container 31>, :instance-group #<synth-group[live]: Inst pluck-saw 32>, :fx-group #<synth-group[live]: Inst pluck-saw FX 33>, :mixer #<synth-node[live]: overtone.stu547/mono-inst-mixer 34>, :bus #<audio-bus: No Name, mono, id 50>, :fx-chain [], :volume #<Atom@6e9cebcc: 1.0>, :pan #<Atom@3cd6d0: 0.0>, :n-chans 1}
user=> (demo pluck-saw)
CompilerException java.lang.RuntimeException: Unable to resolve symbol: demo in this context, compiling:(NO_SOURCE_PATH:1:1)
user=> (overtone.live/demo pluck-saw)
IllegalArgumentException Don't know how to create ISeq from: clojure.lang.Symbol clojure.lang.RT.seqFrom (RT.java:505)
user=> Bye for now!
我缺少一些基本的东西吗？
最佳答案
首先，如果您可以使问题更简单明了，那么将非常有帮助，以便轻松找到可能的解决方案。
另外，感谢您尝试泛音-很抱歉，目前还不清楚。这里有很多事情，所以请您顺便问一些问题:-)
但是，查看您的两个REPL摘录，很明显，您还没有完全了解三件事:
让我简要地讨论其中的每一个，并希望它们能阐明正在发生的事情。
首先，Overtone对Clojure命名空间的使用。当您
use overtone.live时，Overtone正在执行的操作是将Overtone的所有公共API函数导入到您当前的名称空间中。这意味着完成此操作后，所有公共API都将对您可用-即demo，defsynth，sin-osc等。在第二个REPL示例中，您尝试做的第一件事是:
(demo overtone-sketchbook.synths/pluck-saw)无效，因为Clojure尚不知道demo是什么，并且对命名空间overtone-sketchbook.synth也不了解。要了解这些信息，您需要use或require名称空间。有关更多信息，请阅读有关Clojure的ns宏的信息。其次，Overtone的合成器是通过调用代表合成器部分(称为ugens)的函数来设计的。 ugens的示例为
saw，sin-osc和lpf。您可以在[Overtone]备忘单中看到可用ugens的完整列表:https://github.com/overtone/overtone/raw/master/docs/cheatsheet/overtone-cheat-sheet.pdfdemo是一个宏，它允许您传递(部分)synthdef并进行播放:(demo (sin-osc)) (demo (sin-osc 440)) 请注意，ugens是函数，以便允许您传递参数以修改其行为(例如440 hz参数到
sin-osc ugen)。同样重要的是要注意，ugens不能(当前)与合成器一样对待。 ugen是合成器的组成部分，合成器是ugens的树。这使我想到了第三个问题-您正在尝试
demo和pluck-saw合成器。这是一个已经设计好的合成器，只能被触发。要触发合成器，只需将其作为函数调用即可:(pluck-saw)您也可以将参数(如果设计允许)传递给合成触发函数。
总结一下:
ns宏可加载外部名称空间，并引入函数使其可用。对于Overtone的默认API，您需要输入overtone.live或overtone.core(如果尚未启动，则第一个启动服务器)。 demo和defsynth宏来理解。您可以将参数传递给ugen函数以指定其行为。 最后，一定要加入我们的邮件列表中，我们很乐意看到您在Overtone做的事情(并计划做些什么)，并与您分享我们的热情:
http://groups.google.com/group/overtone/