diff --git a/schema.json b/schema.json
index 95247a8..91e9c9b 100644
--- a/schema.json
+++ b/schema.json
@@ -11,6 +11,7 @@
         "metadata": {
             "description": "Contains information that applies to the whole set of charts",
             "type": "object",
+            "additionalProperties": false,
             "properties": {
                 "title": {
                     "description": "The title of the song",
@@ -28,14 +29,6 @@
                     "description": "Path to the album cover, relative to the memon file",
                     "type": "string"
                 },
-                "BPM": {
-                    "description": "Song tempo in Beats per Minute",
-                    "$ref": "#/$defs/strictlyPositiveDecimal"
-                },
-                "offset": {
-                    "description": "In seconds, opposite of the time position of the first beat in the music file",
-                    "$ref": "#/$defs/decimal"
-                },
                 "preview": {
                     "description": "Describes the part of the music file that's to be played on loop when previewing this song",
                     "oneOf": [{
@@ -59,24 +52,31 @@
                         }
                     ]
                 }
-            },
-            "required": ["title", "artist", "BPM", "offset"]
+            }
+        },
+        "timing": {
+            "description": "default timing, applies by default to every chart in the file",
+            "$ref": "#/$defs/timingObject"
         },
         "data": {
-            "description": "Charts with difficulty names used as keys",
+            "description": "Mapping that associates difficulty names to charts",
             "type": "object",
             "additionalProperties": {
                 "description": "A chart",
                 "type": "object",
                 "properties": {
                     "level": {
-                        "description": "Level rating of the chart, typically goes from 0 to 10 in jubeat",
-                        "type": "integer"
+                        "description": "Level rating of the chart, typically goes from 1 to 10.9 in jubeat",
+                        "$ref": "#/$defs/positiveDecimal"
                     },
                     "resolution": {
-                        "description": "Tempo resolution, number of \"ticks\" in a beat",
+                        "description": "Number of ticks in a beat for the notes",
                         "type": "integer",
-                        "exclusiveMinimum": 0
+                        "minimum": 1
+                    },
+                    "timing": {
+                        "description": "Chart-specific timing to be used instead of the default timing info",
+                        "$ref": "#/$defs/timingObject"
                     },
                     "notes": {
                         "description": "The array of notes",
@@ -92,28 +92,12 @@
                                     "maximum": 15
                                 },
                                 "t": {
-                                    "description": "Note time",
-                                    "oneOf": [{
-                                            "description": "Time measured in \"ticks\" as specified with the resolution",
-                                            "type": "integer",
-                                            "minimum": 0
-                                        },
-                                        {
-                                            "$ref": "#/$defs/timeFraction"
-                                        }
-                                    ]
+                                    "description": "Note time, either in ticks or as a standalone fraction",
+                                    "$ref": "#/$defs/timeInBeats"
                                 },
                                 "l": {
-                                    "description": "Long note duration",
-                                    "oneOf": [{
-                                            "description": "Long Note Lenght in ticks",
-                                            "type": "integer",
-                                            "minimum": 1
-                                        },
-                                        {
-                                            "$ref": "#/$defs/nonZeroTimeFraction"
-                                        }
-                                    ]
+                                    "description": "Long note duration, either in ticks or as a standalone fraction",
+                                    "$ref": "#/$defs/nonZeroTimeInBeats"
                                 },
                                 "p": {
                                     "description": "Tail starting position, relative to note position, counting from 0 to 11 clockwise and expanding out starting one square above the note",
@@ -131,14 +115,38 @@
                         }
                     }
                 },
-                "required": ["level", "resolution", "notes"]
+                "required": ["notes"]
             }
         }
     },
-    "required": ["version", "metadata", "data"],
+    "required": ["version", "data"],
     "$defs": {
-        "timeFraction": {
-            "description": "Time represented as a fraction",
+        "timeInBeats": {
+            "description": "Time measured as a fraction of beats, either in ticks or as a standalone fraction",
+            "oneOf": [
+                {
+                    "type": "integer",
+                    "minimum": 0
+                },
+                {
+                    "$ref": "#/$defs/positiveTimeFraction"
+                }
+            ]
+        },
+        "nonZeroTimeInBeats": {
+            "description": "Strictly positive time measured as a fraction of beats, either in ticks or as a standalone fraction",
+            "oneOf": [
+                {
+                    "type": "integer",
+                    "minimum": 1
+                },
+                {
+                    "$ref": "#/$defs/strictlyPositiveTimeFraction"
+                }
+            ]
+        },
+        "positiveTimeFraction": {
+            "description": "Time in beats represented as a fraction",
             "type": "array",
             "minItems": 3,
             "maxItems": 3,
@@ -159,10 +167,10 @@
                 }
             ]
         },
-        "nonZeroTimeFraction": {
-            "description": "Non-zero time represented as a fraction",
+        "strictlyPositiveTimeFraction": {
+            "description": "Non-zero time in beats represented as a fraction",
             "allOf": [{
-                    "$ref": "#/$defs/timeFraction"
+                    "$ref": "#/$defs/positiveTimeFraction"
                 },
                 {
                     "not": {
@@ -190,7 +198,7 @@
             ]
         },
         "positiveDecimal": {
-            "description": "a decimal number as either a number literal or a string",
+            "description": "a positive decimal number as either a number literal or a string",
             "oneOf": [{
                 "type": "number"
             },
@@ -204,13 +212,47 @@
             "description": "a strictly positive decimal number as either a number literal or a string",
             "oneOf": [{
                 "type": "number",
-                "exclusiveMinimum": 0
+                "minimum": 1
             },
             {
                 "type": "string",
                 "pattern": "^(0\\.\\d*[1-9]\\d*|\\d*[1-9]\\d*(\\.\\d+)?)$"
             }
             ]
+        },
+        "timingObject": {
+            "type": "object",
+            "properties": {
+                "offset": {
+                    "description": "In seconds, time at which the first beat occurs in the music file",
+                    "$ref": "#/$defs/decimal"
+                },
+                "resolution": {
+                    "description": "Number of ticks in a beat for the bpm events",
+                    "type": "integer",
+                    "minimum": 1
+                },
+                "bpms": {
+                    "description": "Array of BPM events",
+                    "type": "array",
+                    "minItems": 1,
+                    "items": {
+                        "description": "A single BPM event",
+                        "type": "object",
+                        "properties": {
+                            "beat": {
+                                "description": "Time at which the bpm changes",
+                                "$ref": "#/$defs/timeInBeats"
+                            },
+                            "bpm": {
+                                "description": "Tempo measured in Beats Per Minute",
+                                "$ref": "#/$defs/strictlyPositiveDecimal"
+                            }
+                        },
+                        "required": ["beat", "bpm"]
+                    }
+                }
+            }
         }
     }
 }
\ No newline at end of file
diff --git a/tests/conftest.py b/tests/conftest.py
index 971d55c..c20e6c4 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -32,10 +32,10 @@ class ExamplesFolder(pytest.Collector):
 class ExampleSubfolder(pytest.Collector):
     def collect(self):
         path = Path(self.fspath)
-        for file in (path / "pass").glob("*.json"):
+        for file in sorted((path / "pass").glob("*.json")):
             yield ValidExample.from_parent(self, name=file.stem, path=file)
         
-        for file in (path / "fail").glob("*.json"):
+        for file in sorted((path / "fail").glob("*.json")):
             yield InvalidExample.from_parent(self, name=file.stem, path=file)
 
 
diff --git a/tests/data/01 - basic/pass/basic.json b/tests/data/01 - basic/pass/basic.json
index 5b08c12..cd3ce00 100644
--- a/tests/data/01 - basic/pass/basic.json	
+++ b/tests/data/01 - basic/pass/basic.json	
@@ -1,10 +1,4 @@
 {
     "version": "1.0.0",
-    "metadata": {
-        "title": "",
-        "artist": "",
-        "BPM": 1,
-        "offset": 0
-    },
     "data": {}
 }
\ No newline at end of file
diff --git a/tests/data/02 - polymorphic preview/fail/array is invalid.json b/tests/data/02 - polymorphic preview/fail/array is invalid.json
index 194156f..3b0283d 100644
--- a/tests/data/02 - polymorphic preview/fail/array is invalid.json	
+++ b/tests/data/02 - polymorphic preview/fail/array is invalid.json	
@@ -1,10 +1,6 @@
 {
     "version": "1.0.0",
     "metadata": {
-        "song title": "",
-        "artist": "",
-        "BPM": 1,
-        "offset": 0,
         "preview": []
     },
     "data": {}
diff --git a/tests/data/02 - polymorphic preview/fail/invalid object example.json b/tests/data/02 - polymorphic preview/fail/invalid object example.json
index 4e67442..61826c5 100644
--- a/tests/data/02 - polymorphic preview/fail/invalid object example.json	
+++ b/tests/data/02 - polymorphic preview/fail/invalid object example.json	
@@ -1,10 +1,6 @@
 {
     "version": "1.0.0",
     "metadata": {
-        "song title": "",
-        "artist": "",
-        "BPM": 1,
-        "offset": 0,
         "preview": {
             "position": 0,
             "duration": 0
diff --git a/tests/data/02 - polymorphic preview/fail/null is invalid.json b/tests/data/02 - polymorphic preview/fail/null is invalid.json
index ad26996..b2a08f2 100644
--- a/tests/data/02 - polymorphic preview/fail/null is invalid.json	
+++ b/tests/data/02 - polymorphic preview/fail/null is invalid.json	
@@ -1,10 +1,6 @@
 {
     "version": "1.0.0",
     "metadata": {
-        "song title": "",
-        "artist": "",
-        "BPM": 1,
-        "offset": 0,
         "preview": null
     },
     "data": {}
diff --git a/tests/data/02 - polymorphic preview/fail/number is invalid.json b/tests/data/02 - polymorphic preview/fail/number is invalid.json
index 5738dc0..3114267 100644
--- a/tests/data/02 - polymorphic preview/fail/number is invalid.json	
+++ b/tests/data/02 - polymorphic preview/fail/number is invalid.json	
@@ -1,10 +1,6 @@
 {
     "version": "1.0.0",
     "metadata": {
-        "song title": "",
-        "artist": "",
-        "BPM": 1,
-        "offset": 0,
         "preview": 3
     },
     "data": {}
diff --git a/tests/data/02 - polymorphic preview/pass/good object.json b/tests/data/02 - polymorphic preview/pass/good object.json
index 5a4d123..eec0224 100644
--- a/tests/data/02 - polymorphic preview/pass/good object.json	
+++ b/tests/data/02 - polymorphic preview/pass/good object.json	
@@ -1,10 +1,6 @@
 {
     "version": "1.0.0",
     "metadata": {
-        "title": "",
-        "artist": "",
-        "BPM": 1,
-        "offset": 0,
         "preview": {
             "start": 0,
             "duration": 1
diff --git a/tests/data/02 - polymorphic preview/pass/good string.json b/tests/data/02 - polymorphic preview/pass/good string.json
index a144613..092f87a 100644
--- a/tests/data/02 - polymorphic preview/pass/good string.json	
+++ b/tests/data/02 - polymorphic preview/pass/good string.json	
@@ -1,10 +1,6 @@
 {
     "version": "1.0.0",
     "metadata": {
-        "title": "",
-        "artist": "",
-        "BPM": 1,
-        "offset": 0,
         "preview": "blablabla"
     },
     "data": {}
diff --git a/tests/data/05 - fraction times/fail/2 ints is too short.json b/tests/data/05 - fraction times/fail/2 ints is too short.json
index cb78a92..184115c 100644
--- a/tests/data/05 - fraction times/fail/2 ints is too short.json	
+++ b/tests/data/05 - fraction times/fail/2 ints is too short.json	
@@ -1,11 +1,5 @@
 {
     "version": "1.0.0",
-    "metadata": {
-        "title": "",
-        "artist": "",
-        "BPM": 1,
-        "offset": 0
-    },
     "data": {
         "BSC": {
             "level": 0,
diff --git a/tests/data/05 - fraction times/fail/4 ints is too big.json b/tests/data/05 - fraction times/fail/4 ints is too big.json
index 2cf1ede..ab030a8 100644
--- a/tests/data/05 - fraction times/fail/4 ints is too big.json	
+++ b/tests/data/05 - fraction times/fail/4 ints is too big.json	
@@ -1,11 +1,5 @@
 {
     "version": "1.0.0",
-    "metadata": {
-        "title": "",
-        "artist": "",
-        "BPM": 1,
-        "offset": 0
-    },
     "data": {
         "BSC": {
             "level": 0,
diff --git a/tests/data/05 - fraction times/fail/long note duration cannot be zero.json b/tests/data/05 - fraction times/fail/long note duration cannot be zero.json
index d9dc815..2d45d6c 100644
--- a/tests/data/05 - fraction times/fail/long note duration cannot be zero.json	
+++ b/tests/data/05 - fraction times/fail/long note duration cannot be zero.json	
@@ -1,11 +1,5 @@
 {
     "version": "1.0.0",
-    "metadata": {
-        "title": "",
-        "artist": "",
-        "BPM": 1,
-        "offset": 0
-    },
     "data": {
         "BSC": {
             "level": 0,
diff --git a/tests/data/05 - fraction times/fail/only ints work.json b/tests/data/05 - fraction times/fail/only ints work.json
index 6104d8f..f81335f 100644
--- a/tests/data/05 - fraction times/fail/only ints work.json	
+++ b/tests/data/05 - fraction times/fail/only ints work.json	
@@ -1,11 +1,5 @@
 {
     "version": "1.0.0",
-    "metadata": {
-        "title": "",
-        "artist": "",
-        "BPM": 1,
-        "offset": 0
-    },
     "data": {
         "BSC": {
             "level": 0,
diff --git a/tests/data/05 - fraction times/pass/fraction are allowed for duration.json b/tests/data/05 - fraction times/pass/fraction are allowed for duration.json
index f85eebf..aef0152 100644
--- a/tests/data/05 - fraction times/pass/fraction are allowed for duration.json	
+++ b/tests/data/05 - fraction times/pass/fraction are allowed for duration.json	
@@ -1,11 +1,5 @@
 {
     "version": "1.0.0",
-    "metadata": {
-        "title": "",
-        "artist": "",
-        "BPM": 1,
-        "offset": 0
-    },
     "data": {
         "BSC": {
             "level": 0,
diff --git a/tests/data/05 - fraction times/pass/fractions are allowed for time.json b/tests/data/05 - fraction times/pass/fractions are allowed for time.json
index 841223d..effa2b4 100644
--- a/tests/data/05 - fraction times/pass/fractions are allowed for time.json	
+++ b/tests/data/05 - fraction times/pass/fractions are allowed for time.json	
@@ -1,11 +1,5 @@
 {
     "version": "1.0.0",
-    "metadata": {
-        "title": "",
-        "artist": "",
-        "BPM": 1,
-        "offset": 0
-    },
     "data": {
         "BSC": {
             "level": 0,
diff --git a/tests/data/05 - fraction times/pass/ticks still work for duration.json b/tests/data/05 - fraction times/pass/ticks still work for duration.json
index ff2495d..c5194ba 100644
--- a/tests/data/05 - fraction times/pass/ticks still work for duration.json	
+++ b/tests/data/05 - fraction times/pass/ticks still work for duration.json	
@@ -1,11 +1,5 @@
 {
     "version": "1.0.0",
-    "metadata": {
-        "title": "",
-        "artist": "",
-        "BPM": 1,
-        "offset": 0
-    },
     "data": {
         "BSC": {
             "level": 0,
diff --git a/tests/data/05 - fraction times/pass/ticks still work for time.json b/tests/data/05 - fraction times/pass/ticks still work for time.json
index 3660857..32b5ab4 100644
--- a/tests/data/05 - fraction times/pass/ticks still work for time.json	
+++ b/tests/data/05 - fraction times/pass/ticks still work for time.json	
@@ -1,11 +1,5 @@
 {
     "version": "1.0.0",
-    "metadata": {
-        "title": "",
-        "artist": "",
-        "BPM": 1,
-        "offset": 0
-    },
     "data": {
         "BSC": {
             "level": 0,
diff --git a/tests/data/06 - decimals as string/fail/negative BPM number.json b/tests/data/06 - decimals as string/fail/negative BPM number.json
index d144056..bb64bab 100644
--- a/tests/data/06 - decimals as string/fail/negative BPM number.json	
+++ b/tests/data/06 - decimals as string/fail/negative BPM number.json	
@@ -1,10 +1,12 @@
 {
     "version": "1.0.0",
-    "metadata": {
-        "title": "",
-        "artist": "",
-        "BPM": -1,
-        "offset": 0
+    "timing": {
+        "bpms": [
+            {
+                "beat": 0,
+                "bpm": -1
+            }
+        ]
     },
     "data": {}
 }
\ No newline at end of file
diff --git a/tests/data/06 - decimals as string/fail/negative BPM string.json b/tests/data/06 - decimals as string/fail/negative BPM string.json
new file mode 100644
index 0000000..732794a
--- /dev/null
+++ b/tests/data/06 - decimals as string/fail/negative BPM string.json	
@@ -0,0 +1,12 @@
+{
+    "version": "1.0.0",
+    "timing": {
+        "bpms": [
+            {
+                "beat": 0,
+                "bpm": "-1"
+            }
+        ]
+    },
+    "data": {}
+}
\ No newline at end of file
diff --git a/tests/data/06 - decimals as string/fail/preview object with decimal zero duration.json b/tests/data/06 - decimals as string/fail/preview object with decimal zero duration.json
index ea89e21..2507ff6 100644
--- a/tests/data/06 - decimals as string/fail/preview object with decimal zero duration.json	
+++ b/tests/data/06 - decimals as string/fail/preview object with decimal zero duration.json	
@@ -1,10 +1,6 @@
 {
     "version": "1.0.0",
     "metadata": {
-        "title": "",
-        "artist": "",
-        "BPM": 1,
-        "offset": 0,
         "preview": {
             "start": "0",
             "duration": "0.000"
diff --git a/tests/data/06 - decimals as string/fail/preview object with negative duration copy.json b/tests/data/06 - decimals as string/fail/preview object with negative duration copy.json
index c614ddd..1f9f2c6 100644
--- a/tests/data/06 - decimals as string/fail/preview object with negative duration copy.json	
+++ b/tests/data/06 - decimals as string/fail/preview object with negative duration copy.json	
@@ -1,10 +1,6 @@
 {
     "version": "1.0.0",
     "metadata": {
-        "title": "",
-        "artist": "",
-        "BPM": 1,
-        "offset": 0,
         "preview": {
             "start": "0",
             "duration": "-10.000"
diff --git a/tests/data/06 - decimals as string/fail/preview object with zero duration copy.json b/tests/data/06 - decimals as string/fail/preview object with zero duration.json
similarity index 64%
rename from tests/data/06 - decimals as string/fail/preview object with zero duration copy.json
rename to tests/data/06 - decimals as string/fail/preview object with zero duration.json
index a602579..72a7498 100644
--- a/tests/data/06 - decimals as string/fail/preview object with zero duration copy.json	
+++ b/tests/data/06 - decimals as string/fail/preview object with zero duration.json	
@@ -1,10 +1,6 @@
 {
     "version": "1.0.0",
     "metadata": {
-        "title": "",
-        "artist": "",
-        "BPM": 1,
-        "offset": 0,
         "preview": {
             "start": "0",
             "duration": "0"
diff --git a/tests/data/06 - decimals as string/fail/zero BPM decimal string.json b/tests/data/06 - decimals as string/fail/zero BPM decimal string.json
index e5f351b..ad94a6f 100644
--- a/tests/data/06 - decimals as string/fail/zero BPM decimal string.json	
+++ b/tests/data/06 - decimals as string/fail/zero BPM decimal string.json	
@@ -1,10 +1,12 @@
 {
     "version": "1.0.0",
-    "metadata": {
-        "title": "",
-        "artist": "",
-        "BPM": "0.000",
-        "offset": 0
+    "timing": {
+        "bpms": [
+            {
+                "beat": "0.000",
+                "bpm": -1
+            }
+        ]
     },
     "data": {}
 }
\ No newline at end of file
diff --git a/tests/data/06 - decimals as string/fail/zero BPM number.json b/tests/data/06 - decimals as string/fail/zero BPM number.json
index 72a8914..4518abf 100644
--- a/tests/data/06 - decimals as string/fail/zero BPM number.json	
+++ b/tests/data/06 - decimals as string/fail/zero BPM number.json	
@@ -1,10 +1,12 @@
 {
     "version": "1.0.0",
-    "metadata": {
-        "title": "",
-        "artist": "",
-        "BPM": 0,
-        "offset": 0
+    "timing": {
+        "bpms": [
+            {
+                "beat": 0,
+                "bpm": 0
+            }
+        ]
     },
     "data": {}
 }
\ No newline at end of file
diff --git a/tests/data/06 - decimals as string/fail/zero BPM string.json b/tests/data/06 - decimals as string/fail/zero BPM string.json
index ae9f892..2936521 100644
--- a/tests/data/06 - decimals as string/fail/zero BPM string.json	
+++ b/tests/data/06 - decimals as string/fail/zero BPM string.json	
@@ -1,10 +1,12 @@
 {
     "version": "1.0.0",
-    "metadata": {
-        "title": "",
-        "artist": "",
-        "BPM": "0",
-        "offset": 0
+    "timing": {
+        "bpms": [
+            {
+                "beat": 0,
+                "bpm": "0"
+            }
+        ]
     },
     "data": {}
 }
\ No newline at end of file
diff --git a/tests/data/06 - decimals as string/pass/decimal string BPM 1.json b/tests/data/06 - decimals as string/pass/decimal string BPM 1.json
index aa7ca43..370d683 100644
--- a/tests/data/06 - decimals as string/pass/decimal string BPM 1.json	
+++ b/tests/data/06 - decimals as string/pass/decimal string BPM 1.json	
@@ -1,10 +1,12 @@
 {
     "version": "1.0.0",
-    "metadata": {
-        "title": "",
-        "artist": "",
-        "BPM": "0.1",
-        "offset": 0
+    "timing": {
+        "bpms": [
+            {
+                "beat": 0,
+                "bpm": "0.1"
+            }
+        ]
     },
     "data": {}
 }
\ No newline at end of file
diff --git a/tests/data/06 - decimals as string/pass/decimal string BPM 2.json b/tests/data/06 - decimals as string/pass/decimal string BPM 2.json
index 4e3ae2d..4c818b4 100644
--- a/tests/data/06 - decimals as string/pass/decimal string BPM 2.json	
+++ b/tests/data/06 - decimals as string/pass/decimal string BPM 2.json	
@@ -1,10 +1,12 @@
 {
     "version": "1.0.0",
-    "metadata": {
-        "title": "",
-        "artist": "",
-        "BPM": "123.456",
-        "offset": 0
+    "timing": {
+        "bpms": [
+            {
+                "beat": 0,
+                "bpm": "123.456"
+            }
+        ]
     },
     "data": {}
 }
\ No newline at end of file
diff --git a/tests/data/06 - decimals as string/pass/decimal string offset 1.json b/tests/data/06 - decimals as string/pass/decimal string offset 1.json
index d95f800..53e7a9c 100644
--- a/tests/data/06 - decimals as string/pass/decimal string offset 1.json	
+++ b/tests/data/06 - decimals as string/pass/decimal string offset 1.json	
@@ -1,10 +1,13 @@
 {
     "version": "1.0.0",
-    "metadata": {
-        "title": "",
-        "artist": "",
-        "BPM": 123.456,
-        "offset": "-0.24"
+    "timing": {
+        "offset": "-0.24",
+        "bpms": [
+            {
+                "beat": 0,
+                "bpm": 123.456
+            }
+        ]
     },
     "data": {}
 }
\ No newline at end of file
diff --git a/tests/data/06 - decimals as string/pass/decimal string offset 2.json b/tests/data/06 - decimals as string/pass/decimal string offset 2.json
index e7c0798..7f81ec2 100644
--- a/tests/data/06 - decimals as string/pass/decimal string offset 2.json	
+++ b/tests/data/06 - decimals as string/pass/decimal string offset 2.json	
@@ -1,10 +1,13 @@
 {
     "version": "1.0.0",
-    "metadata": {
-        "title": "",
-        "artist": "",
-        "BPM": 123.456,
-        "offset": "12.34"
+    "timing": {
+        "offset": "12.34",
+        "bpms": [
+            {
+                "beat": 0,
+                "bpm": 123.456
+            }
+        ]
     },
     "data": {}
 }
\ No newline at end of file
diff --git a/tests/data/06 - decimals as string/pass/integer BPM.json b/tests/data/06 - decimals as string/pass/integer BPM.json
index f31d324..a782635 100644
--- a/tests/data/06 - decimals as string/pass/integer BPM.json	
+++ b/tests/data/06 - decimals as string/pass/integer BPM.json	
@@ -1,10 +1,12 @@
 {
     "version": "1.0.0",
-    "metadata": {
-        "title": "",
-        "artist": "",
-        "BPM": 125,
-        "offset": 0
+    "timing": {
+        "bpms": [
+            {
+                "beat": 0,
+                "bpm": 125
+            }
+        ]
     },
     "data": {}
 }
\ No newline at end of file
diff --git a/tests/data/06 - decimals as string/pass/integer string BPM.json b/tests/data/06 - decimals as string/pass/integer string BPM.json
index e0f8fb6..b0838e8 100644
--- a/tests/data/06 - decimals as string/pass/integer string BPM.json	
+++ b/tests/data/06 - decimals as string/pass/integer string BPM.json	
@@ -1,10 +1,12 @@
 {
     "version": "1.0.0",
-    "metadata": {
-        "title": "",
-        "artist": "",
-        "BPM": "123",
-        "offset": 0
+    "timing": {
+        "bpms": [
+            {
+                "beat": 0,
+                "bpm": "123"
+            }
+        ]
     },
     "data": {}
 }
\ No newline at end of file
diff --git a/tests/data/06 - decimals as string/pass/number BPM.json b/tests/data/06 - decimals as string/pass/number BPM.json
index 2293199..7dfdcfe 100644
--- a/tests/data/06 - decimals as string/pass/number BPM.json	
+++ b/tests/data/06 - decimals as string/pass/number BPM.json	
@@ -1,10 +1,12 @@
 {
     "version": "1.0.0",
-    "metadata": {
-        "title": "",
-        "artist": "",
-        "BPM": 123.456,
-        "offset": 0
+    "timing": {
+        "bpms": [
+            {
+                "beat": 0,
+                "bpm": 123.456
+            }
+        ]
     },
     "data": {}
 }
\ No newline at end of file
diff --git a/tests/data/06 - decimals as string/pass/preview object.json b/tests/data/06 - decimals as string/pass/preview object.json
index 560b1f2..2efb95e 100644
--- a/tests/data/06 - decimals as string/pass/preview object.json	
+++ b/tests/data/06 - decimals as string/pass/preview object.json	
@@ -1,10 +1,6 @@
 {
     "version": "1.0.0",
     "metadata": {
-        "title": "",
-        "artist": "",
-        "BPM": 1,
-        "offset": 0,
         "preview": {
             "start": "8346.9346",
             "duration": "35.936"
diff --git a/tests/data/06 - decimals as string/fail/negative BPM string copy.json b/tests/data/07 - bpm changes/fail/timing info in metadata.json
similarity index 57%
rename from tests/data/06 - decimals as string/fail/negative BPM string copy.json
rename to tests/data/07 - bpm changes/fail/timing info in metadata.json
index ca92578..7af5144 100644
--- a/tests/data/06 - decimals as string/fail/negative BPM string copy.json	
+++ b/tests/data/07 - bpm changes/fail/timing info in metadata.json	
@@ -1,9 +1,7 @@
 {
     "version": "1.0.0",
     "metadata": {
-        "title": "",
-        "artist": "",
-        "BPM": "-1",
+        "BPM": 1,
         "offset": 0
     },
     "data": {}
diff --git a/tests/data/07 - bpm changes/pass/basic.json b/tests/data/07 - bpm changes/pass/basic.json
new file mode 100644
index 0000000..055e622
--- /dev/null
+++ b/tests/data/07 - bpm changes/pass/basic.json	
@@ -0,0 +1,9 @@
+{
+    "version": "1.0.0",
+    "timing": {
+        "offset": 0,
+        "resolution": 1,
+        "bpms": [{"beat": 0, "bpm": 1}]
+    },
+    "data": {}
+}
\ No newline at end of file
diff --git a/tests/data/07 - bpm changes/pass/per-chart partial.json b/tests/data/07 - bpm changes/pass/per-chart partial.json
new file mode 100644
index 0000000..0311d7c
--- /dev/null
+++ b/tests/data/07 - bpm changes/pass/per-chart partial.json	
@@ -0,0 +1,29 @@
+{
+    "version": "1.0.0",
+    "timing": {
+        "offset": 0,
+        "resolution": 1,
+        "bpms": [{"beat": 0, "bpm": 1}]
+    },
+    "data": {
+        "BSC": {
+            "timing": {
+                "bpms": [{"beat": 0, "bpm": 1}]
+            },
+            "notes": []
+        },
+        "ADV": {
+            "timing": {
+                "bpms": [{"beat": 0, "bpm": 2}]
+            },
+            "notes": []
+        },
+        "EXT": {
+            "timing": {
+                "resolution": 2,
+                "bpms": [{"beat": 0, "bpm": 3}]
+            },
+            "notes": []
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/data/07 - bpm changes/pass/per-chart.json b/tests/data/07 - bpm changes/pass/per-chart.json
new file mode 100644
index 0000000..82caaab
--- /dev/null
+++ b/tests/data/07 - bpm changes/pass/per-chart.json	
@@ -0,0 +1,34 @@
+{
+    "version": "1.0.0",
+    "timing": {
+        "offset": 0,
+        "resolution": 1,
+        "bpms": [{"beat": 0, "bpm": 1}]
+    },
+    "data": {
+        "BSC": {
+            "timing": {
+                "offset": 0,
+                "resolution": 1,
+                "bpms": [{"beat": 0, "bpm": 1}]
+            },
+            "notes": []
+        },
+        "ADV": {
+            "timing": {
+                "offset": 0,
+                "resolution": 1,
+                "bpms": [{"beat": 0, "bpm": 1}]
+            },
+            "notes": []
+        },
+        "EXT": {
+            "timing": {
+                "offset": 0,
+                "resolution": 1,
+                "bpms": [{"beat": 0, "bpm": 1}]
+            },
+            "notes": []
+        }
+    }
+}
\ No newline at end of file