diff --git a/poc/poc.yml b/poc/poc.yml
index 87f09d9..92c4b32 100644
--- a/poc/poc.yml
+++ b/poc/poc.yml
@@ -50,4 +50,4 @@ channels:
         volume modifier prefix: v
         octave modifier prefix: o
         length modifier prefix: l
-        tempo modifier prefix: t,
+        tempo modifier prefix: t
diff --git a/src/bng/instrument.rs b/src/bng/instrument.rs
index dce3256..af5164f 100644
--- a/src/bng/instrument.rs
+++ b/src/bng/instrument.rs
@@ -13,5 +13,5 @@ use super::Expression as Instruction;
 pub struct Instrument {
     #[target]
     expr: Instruction,
-    vars: Option<HashMap<String, f64>>,
+    vars: Option<HashMap<String, f32>>,
 }
diff --git a/src/bng/score/de.rs b/src/bng/score/de.rs
index cf5aba7..459e232 100644
--- a/src/bng/score/de.rs
+++ b/src/bng/score/de.rs
@@ -45,8 +45,7 @@ impl<'de> Deserialize<'de> for Atoms {
             Ok(Default::default())
         } else {
             set_notes(notes).unwrap();
-            all_consuming(root)
-                .parse(&sheet)
+            all_consuming(root)(&sheet)
                 .map_err(|e| pretty_verbose_err.curry().call1(sheet.as_str()).call1(e))
                 .map_err(de::Error::custom)
                 .map(|(i, r)| r)
diff --git a/src/bng/score/lex/lexer.rs b/src/bng/score/lex/lexer.rs
index 75c552e..ef37ccc 100644
--- a/src/bng/score/lex/lexer.rs
+++ b/src/bng/score/lex/lexer.rs
@@ -12,9 +12,9 @@ use nom::{
     branch::alt,
     bytes::complete::{is_not, tag, take_till, take_till1},
     character::complete::{anychar, char, one_of, space1, u16, u8},
-    combinator::{all_consuming, cut, eof, map_opt, map_res, not, opt, value, verify},
+    combinator::{all_consuming, map_opt, map_res, not, opt, value, verify},
     error::{context, ContextError, ErrorKind, FromExternalError, ParseError},
-    multi::{many0, many1, many_till},
+    multi::{many0, many1},
     sequence::{delimited, pair, preceded, separated_pair, terminated},
     Err, IResult, Parser,
 };
@@ -52,9 +52,12 @@ where
         + FromExternalError<&'a str, TryFromIntError>
         + FromExternalError<&'a str, E>,
 {
-    many0(delimited(maybe_yml_str_space, atom, maybe_yml_str_space))
-        .map(Atoms)
-        .parse(i)
+    terminated(
+        many1(preceded(maybe_yml_str_space, atom)),
+        maybe_yml_str_space,
+    )
+    .map(Atoms)
+    .parse(i)
 }
 
 fn note<'a, E>(i: &'a str) -> IResult<&'a str, Atom, E>
@@ -96,7 +99,7 @@ where
     E: ParseError<&'a str> + ContextError<&'a str>,
 {
     use super::super::modifier;
-    context("modifier", preceded(char(Atom::MODIFIER), cut(modifier)))
+    context("modifier", preceded(char(Atom::MODIFIER), modifier))
         .map(Atom::Modifier)
         .parse(i)
 }
@@ -122,7 +125,7 @@ where
         "loop",
         delimited(
             char(Atom::LOOP.0),
-            cut(pair(
+            pair(
                 map_opt(opt(u8), |n| {
                     if let Some(n) = n {
                         NonZeroU8::new(n)
@@ -131,8 +134,8 @@ where
                     }
                 }),
                 root,
-            )),
-            cut(char(Atom::LOOP.1)),
+            ),
+            char(Atom::LOOP.1),
         ),
     )
     .map(|(n, v)| Atom::Loop(n, v))
@@ -148,7 +151,7 @@ where
 {
     context(
         "tuple",
-        delimited(char(Atom::TUPLE.0), cut(root), cut(char(Atom::TUPLE.1))),
+        delimited(char(Atom::TUPLE.0), root, char(Atom::TUPLE.1)),
     )
     .map(Atom::Tuple)
     .parse(i)
@@ -166,7 +169,7 @@ where
         "slope_starts",
         delimited(
             char(Atom::SLOPE.0),
-            cut(separated_pair(
+            separated_pair(
                 separated_pair(
                     slope_modifier,
                     char(' '),
@@ -177,8 +180,8 @@ where
                 ),
                 char(','),
                 root,
-            )),
-            cut(char(Atom::SLOPE.1)),
+            ),
+            char(Atom::SLOPE.1),
         ),
     )
     .map(|((sm, i), v)| Atom::Slope(sm, i, v))
@@ -199,7 +202,7 @@ where
                     value((), comment),
                     value((), is_not(concatcp!(Atom::COMMENT.0, Atom::COMMENT.1))),
                 ))),
-                cut(char(Atom::COMMENT.1)),
+                char(Atom::COMMENT.1),
             ),
         ),
     )(i)
@@ -215,15 +218,15 @@ where
     context(
         "atom",
         alt((
-            comment,
+            note,
+            rest,
             start_here,
             modifier,
             quick_modifier,
             r#loop,
             tuple,
             slope,
-            rest,
-            note,
+            comment,
         )),
     )
     .parse(i)
diff --git a/src/bng/score/lex/lexer/tests.rs b/src/bng/score/lex/lexer/tests.rs
index 8e73570..55d7675 100644
--- a/src/bng/score/lex/lexer/tests.rs
+++ b/src/bng/score/lex/lexer/tests.rs
@@ -123,9 +123,9 @@ mod flat_atom {
             ))
         );
         assert_eq!(
-            Err(nom::Err::Failure(Error::new(
-                concatcp!(0u8, SAMPLE_STR),
-                ErrorKind::MapOpt
+            Err(nom::Err::Error(Error::new(
+                concatcp!(Atom::LOOP.0, 0u8, SAMPLE_STR),
+                ErrorKind::Char
             ))),
             atom.parse(concatcp!(Atom::LOOP.0, 0u8, SAMPLE_STR))
         )
diff --git a/src/main.rs b/src/main.rs
index 256e7f8..5a0fccc 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -41,7 +41,7 @@ fn bngfile_generator() -> BngFile {
                 "square".to_string(),
                 Instrument::new(
                     "v*abs(sin(2*PI*f*t))".parse().unwrap(),
-                    Some(HashMap::from([("v".to_string(), 1f64)])),
+                    Some(HashMap::from([("v".to_string(), 1f32)])),
                 ),
             ),
         ]),