- old_accidental_idx_arr_ = accidental_idx_arr_;
- key_.clear ();
- Scalar prop = get_property ("keyoctaviation");
- if (prop.length_i () > 0)
- {
- key_.multi_octave_b_ = ! prop.to_bool ();
- }
-
- accidental_idx_arr_.clear ();
-
- if (r->ordinary_key_b_)
- {
- int p;
- if (r->pitch_arr_.size () < 1)
- {
- r->warning (_ ("No key name: assuming `C'"));
- p = 0;
- }
- else
- {
- p = r->pitch_arr_[0].semitone_pitch ();
- p += r->modality_i_;
- }
- /* Solve the equation 7*no_of_acc mod 12 = p, -6 <= no_of_acc <= 5 */
- int no_of_acc = (7*p) % 12;
- no_of_acc = (no_of_acc + 18) % 12 -6;
-
- /* Correct from flats to sharps or vice versa */
- if (no_of_acc * r->pitch_arr_[0].accidental_i_ < 0)
- no_of_acc += 12 * sign (r->pitch_arr_[0].accidental_i_);
-
- if (no_of_acc < 0)
- {
- int accidental = 6 ; // First accidental: bes
- for ( ; no_of_acc < 0 ; no_of_acc++ )
- {
- Musical_pitch m;
- m.accidental_i_ = -1;
- m.notename_i_ = accidental;
- if (key_.multi_octave_b_)
- key_.set (m);
- else
- key_.set (m.notename_i_, m.accidental_i_);
- accidental_idx_arr_.push (m);
-
- accidental = (accidental + 3) % 7 ;
- }
- }
- else
- {
- int accidental = 3 ; // First accidental: fis
- for ( ; no_of_acc > 0 ; no_of_acc-- )
- {
- Musical_pitch m;
- m.accidental_i_ = 1;
- m.notename_i_ = accidental;
- if (key_.multi_octave_b_)
- key_.set (m);
- else
- key_.set (m.notename_i_, m.accidental_i_);
- accidental_idx_arr_.push (m);
-
- accidental = (accidental + 4) % 7 ;
- }
- }
- }
- else // Special key