diff --git a/snippets/jbass b/snippets/jbass
index cedf88f..1602902 100644
--- a/snippets/jbass
+++ b/snippets/jbass
@@ -9,7 +9,7 @@ d'bass $
   -- slowspread (\x -> within (0.5, 1) (x)) [id, slow 2 . brak] $ -- (4)
   -- whenmod 4 2 (density 3) $ -- (3)
   -- whenmod 3 2 (slow 2) $ -- (2)
-  sound "[[vb vb:1] ~]/2"
+  sound "[[${1:vb} $1:1] ~]/2"
   # end (slow 1.4 "0.2 0.4")
   # vowel "e o"
   -- # speed (slow 2.5 "1 -1") -- (1)
diff --git a/snippets/jdrum b/snippets/jdrum
index c22c841..f2fe520 100644
--- a/snippets/jdrum
+++ b/snippets/jdrum
@@ -5,8 +5,8 @@
 # expand-env: (yas-indent-line fixed)
 # --
 -- @jdrum
-d'drum $ -- overlay ((1 ~>) $ s "cy/8") $ -- (3), (4) remove
-  -- overlay ((0.5 ~>) $ s "sn/2") $ -- (2)
-  -- every' 8 8 (overlay $ (0.32 ~>) $ s "k*2") $ -- (1)
+d'drum $ -- overlay ((1 ~>) $ s "${3:cy}/8") $ -- (3), (4) remove
+  -- overlay ((0.5 ~>) $ s "${2:sn}/2") $ -- (2)
+  -- every' 8 8 (overlay $ (0.32 ~>) $ s "$1*2") $ -- (1)
   -- every' 12 2 (density 3) $ -- (5)
-  s "k"
+  s "${1:k}"
diff --git a/snippets/jdrum2 b/snippets/jdrum2
index 4305e13..165a3f0 100644
--- a/snippets/jdrum2
+++ b/snippets/jdrum2
@@ -6,6 +6,6 @@
 # --
 -- @jdrum2
 d'drum $ stack [
-  every' 8 7 (overlay $ (0.32 ~>) $ s "k") $ s "[k ~ k*2 ~]/4",
-  every' 16 16 (overlay $ (0.82 ~>) $ s "sn") $ (1 ~>) $ s "sn/2"
+  every' 8 7 (overlay $ (0.32 ~>) $ s "${1:k}") $ s "[$1 ~ $1*2 ~]/4",
+  every' 16 16 (overlay $ (0.82 ~>) $ s "${2:sn}") $ (1 ~>) $ s "$2/2"
   ]
diff --git a/snippets/jeg b/snippets/jeg
index 3159fa1..d4ea5a8 100644
--- a/snippets/jeg
+++ b/snippets/jeg
@@ -10,6 +10,6 @@ d'eg $ -- (0.18 <~) $ -- (4)
   -- (# speed (scale 0.8 1.3 $ slow 4 saw1)) $ -- (2)
   density 0.25 $ -- (3) 0.245
   -- slowspread density [1, 2, 0.5, 2] $ -- (1)
-  gap 128 $ s "eg*2"
+  gap 128 $ s "${1:eg}*2"
   # cut 4
   # gain 0.8
diff --git a/snippets/jgt b/snippets/jgt
index 08f1987..5e80bca 100644
--- a/snippets/jgt
+++ b/snippets/jgt
@@ -8,7 +8,7 @@
 d'gt $ -- density 0.98 $ -- (2)
   every 2 (within (0, 0.5) (0.07 <~)) $ (0.07 ~>) $
   chop 128 $
-  s "[gt [~ gt] ! ~]/2"
+  s "[${1:gt} [~ $1] ! ~]/2"
   # cut 5
   # gain 0.87
   -- # speed (scale 1 1.25 $ slow 1.95 sinewave1) -- (1)
diff --git a/snippets/jpc b/snippets/jpc
index 427ae34..98ebbd7 100644
--- a/snippets/jpc
+++ b/snippets/jpc
@@ -9,7 +9,7 @@ d'pc $
   -- whenmod 7 5 (density 1.25) $ -- (3)
   -- slowspread ($) [rev, id, brak, (0.25 ~>), id] $ -- (2)
   -- slowspread (\x -> within x (slow 1.5)) [(0.25, 0.5), (0.75, 1), (0.25, 0.75)] $ -- (1)
-  slow 16 $ gap 48 $ sound "pc:1"
+  slow 16 $ gap 48 $ sound "${1:pc:1}"
   # gain 0.7
   # cut 7
   # speed "[1 0.7]"
diff --git a/snippets/jpcl b/snippets/jpcl
index eaa5caf..ddb2780 100644
--- a/snippets/jpcl
+++ b/snippets/jpcl
@@ -6,6 +6,6 @@
 # --
 -- @jpcl
 d'pcl $ -- superimpose (slow (10/9) . rev) $ -- (1)
-  slow 16 . gap 64 $ s "pclow"
+  slow 16 . gap 64 $ s "${1:pclow}"
   # gain 0.8
   -- # speed "1 1.5" -- (2)
diff --git a/snippets/jperc b/snippets/jperc
index 673dc5e..76380d1 100644
--- a/snippets/jperc
+++ b/snippets/jperc
@@ -10,6 +10,6 @@ d'perc $
   -- (# pan (density 16 "0.25 0.75")) $ -- (3)
   -- whenmod 16 15 (density 3) $ -- (1)
   smash 16 [0.25, 0.5] $
-  -- every 3 (append $ sound "hh:1 hh") $ -- (2)
-  sound "hh hh:2"
+  -- every 3 (append $ sound "$1:1 $1") $ -- (2)
+  sound "${1:hh} $1:2"
   # gain 0.6
diff --git a/snippets/judu b/snippets/judu
index 523d381..b6dadf3 100644
--- a/snippets/judu
+++ b/snippets/judu
@@ -10,6 +10,6 @@ d'udu $
   -- (every' 3 2 . sometimesBy 0.5 $ density (4/3)) $ -- (1)
   -- (whenmod 7 5 $ trunc (5/6)) $ -- (2)
   slow 4 . chop 128 $
-  sound (samples "udu" (slow 4 $ irand 4))
+  sound (samples "${1:udu}" (slow 4 $ irand 4))
   # gain 0.8
   # cut 6
diff --git a/snippets/jwbass b/snippets/jwbass
index 9e6661b..b3636cf 100644
--- a/snippets/jwbass
+++ b/snippets/jwbass
@@ -8,9 +8,9 @@
 d'wbass $ -- (sometimesBy 0.6 $ superimpose (rev . slow (5/4))) $ -- (5)
   -- every' 4 4 (0.32 ~>) $ -- (2)
   chop 16 $
-  sound "[wb wb:1 ~ ~]/4"
-  -- sound "[wb [wb:1 wb:2] ~ ~]/4" -- (1)
-  -- sound "[wb [wb:1 wb:2] ~ [wb:1 wb:2]]/4" -- (2)
-  -- sound "[wb [wb:1 wb:2] ~ [[wb:1 wb:1/2] wb:2]]/4" -- (4)
+  sound "[${1:wb} $1:1 ~ ~]/4"
+  -- sound "[$1 [$1:1 $1:2] ~ ~]/4" -- (1)
+  -- sound "[$1 [$1:1 $1:2] ~ [$1:1 $1:2]]/4" -- (2)
+  -- sound "[$1 [$1:1 $1:2] ~ [[$1:1 $1:1/2] $1:2]]/4" -- (4)
   # gain 0.9
   -- # speed "[1 1 2]/3" -- (3)