melrōse musical expression player

package core import ( "strconv" "strings" ) // tabs('e3 a2 a5 d5 a5 a2 e3') type BassTablature struct { TabNotes []TabNote } func (t BassTablature) Storex() string { b := new(strings.Builder) b.WriteString("tabs('") for i, each := range t.TabNotes { if i > 0 { b.WriteRune(' ') } each.WriteWith(b) } b.WriteString("')") return b.String() } func (t BassTablature) S() Sequence { notes := []Note{} for _, each := range t.TabNotes { notes = append(notes, each.ToNote()) } return BuildSequence(notes) } // https://www.studybass.com/lessons/reading-music/how-to-read-bass-tab/ type TabNote struct { Name string // E,A,D,G Fret int // [0..24] Dotted bool // if true then fraction is increased by half Velocity int // 1..127 fraction float32 // {0.0625,0.125,0.25,0.5,1} } func (t TabNote) ToNote() Note { n := MakeNote(t.Name, 2, t.fraction, 0, t.Dotted, t.Velocity) if t.Name == "D" || t.Name == "G" { n = n.Octaved(1) } return n.Pitched(t.Fret) } func (t TabNote) IsRest() bool { return t.Name == "=" } func (t TabNote) String() string { b := new(strings.Builder) t.WriteWith(b) return b.String() } func (t TabNote) WriteWith(b *strings.Builder) { if t.fraction != 0.25 { b.WriteString(FractionToString(t.fraction)) } if t.Dotted { b.WriteRune('.') } b.WriteString(t.Name) if !t.IsRest() { b.WriteString(strconv.Itoa(t.Fret)) } if t.Velocity != Normal { b.WriteString(VelocityToDynamic(t.Velocity)) } } func ParseTabNote(input string) (TabNote, error) { return newFormatParser(input).parseTabNote() } func ParseBassTablature(s string) (BassTablature, error) { entries := strings.Split(s, " ") notes := []TabNote{} for _, each := range entries { n, err := ParseTabNote(each) if err != nil { return BassTablature{}, err } notes = append(notes, n) } return BassTablature{notes}, nil }