Synths - fix up sc808 maracas

app/server/ruby/lib/sonicpi/synths/synthinfo.rb

@@ -4439,44 +4439,50 @@ def synth_name
         "sc808_maracas"
       end
 
-      def on_start(studio, args_h)
-        args_h[:rand_buf] = studio.rand_buf_id
-      end
-
       def doc
         "Maracas of the SC808 drum machine based on [Yoshinosuke Horiuchi's](https://www.patreon.com/4H/posts) implementation of the legendary rhythm composer from the early 80s. This is a percussive synth, so it does not use the standard envelope parameters, neither does it feature slideable parameters."
       end
 
       def arg_defaults
         {
-          :cutoff => 113,
           :amp => 1,
+          :amp_slide => 0,
+          :amp_slide_shape => 1,
+          :amp_slide_curve => 0,
           :pan => 0,
+          :pan_slide => 0,
+          :pan_slide_shape => 1,
+          :pan_slide_curve => 0,
+          :click => 1,
+          :decay => 0.1,
+          :decay_curve => -20
         }
       end
 
-      def default_arg_info
-        super.merge({
-          :amp =>
+      def specific_arg_info
+      {
+          :click =>
           {
-            :doc => "The amplitude of the sound. Typically a value between 0 and 1. Higher amplitudes may be used, but won't make the sound louder, they will just reduce the quality of all the sounds currently being played (due to compression.)",
-            :validations => [v_positive(:amp)],
+            :doc => "Amount of initial click to the maraca sound. 0 is no click and 1 is a hard click.",
+            :validations => [v_between_inclusive(:click, 0, 1)],
             :modulatable => false
           },
-          :pan =>
+          :decay =>
           {
-            :doc => "Position of sound in stereo. With headphones on, this means how much of the sound is in the left ear, and how much is in the right ear. With a value of -1, the sound is completely in the left ear, a value of 0 puts the sound equally in both ears and a value of 1 puts the sound in the right ear. Values in between -1 and 1 move the sound accordingly.",
-            :validations => [v_between_inclusive(:pan, -1, 1)],
+            :doc => "Amount of decay for the maracas. Higher numbers increase the decay duration.",
+            :validations => [v_positive_not_zero(:decay)],
             :modulatable => false
           },
-          :cutoff =>
+
+          :decay_curve =>
           {
-            :doc => "MIDI note representing the highest frequencies allowed to be present in the sound. A low value like 30 makes the sound round and dull, a high value like 100 makes the sound buzzy and crispy.",
-            :validations => [v_positive(:cutoff), v_less_than(:cutoff, 131)],
-            :modulatable => false,
-            :midi => true
+            :doc => "Curve value for the decay of the maracas",
+            :validations => [],
+            :modulatable => false
           },
-        })
+      }
+
+
       end
     end
 

etc/synthdefs/designs/supercollider/sc808.scd

@@ -398,23 +398,32 @@ SynthDef('sonic-pi-sc808_claves', {|
 
 SynthDef('sonic-pi-sc808_maracas', {|
 
-  amp = 1,
-  cutoff = 113,
-  pan = 0,
+
+
+  amp = 1, amp_slide = 0, amp_slide_shape = 1, amp_slide_curve = 0,
+  pan = 0, pan_slide = 0, pan_slide_shape = 1, pan_slide_curve = 0,
+  hpf = 113, hpf_slide = 0, hpf_slide_shape = 1, hpf_slide_curve = 1,
+  click = 0.027,
+  decay = 0.07,
+  decay_curve = -250
 
   out_bus = 0|
 
   var sig, env;
 
-  cutoff = cutoff.midicps;
+  amp = amp.varlag(amp_slide, amp_slide_curve, amp_slide_shape);
+  pan = pan.varlag(pan_slide, pan_slide_curve, pan_slide_shape);
+  hpf = hpf.varlag(hpf_slide, hpf_slide_curve, hpf_slide_shape);
 
-  env = EnvGen.kr(Env.new([0.3, 1, 0], [0.027, 0.07], -250), doneAction:2);
-  sig = WhiteNoise.ar * env * amp;
-  sig = HPF.ar(sig, cutoff);
+  hpf = hpf.midicps;
 
+  env = EnvGen.kr(Env.new([0.3, 1, 0], [click, decay], decay_curve), doneAction:2);
+  sig = WhiteNoise.ar * env * amp;
+  sig = HPF.ar(sig, hpf);
+  DetectSilence.ar(sig, doneAction: Done.freeSelf);
   Out.ar(out_bus, Pan2.ar(sig, pan));
 
-}).writeDefFile("/Users/sam/Development/RPi/sonic-pi/etc/synthdefs/compiled/");
+}).writeDefFile("/Users/sam/Development/sonic-pi/etc/synthdefs/compiled/");
 
 SynthDef('sonic-pi-sc808_cowbell', {|