Adds on the track a sawtooth wave with an ADSR envelope:
Type | Intent | Optional | Attributes | Name | ||
---|---|---|---|---|---|---|
type(tape_recorder), | intent(inout) | :: | tape | |||
integer, | intent(in) | :: | track | |||
real(kind=wp), | intent(in) | :: | t1 | |||
real(kind=wp), | intent(in) | :: | t2 | |||
real(kind=wp), | intent(in) | :: | f | |||
real(kind=wp), | intent(in) | :: | Amp | |||
type(ADSR_envelope), | intent(in), | optional | :: | envelope |
subroutine add_sawtooth_wave(tape, track, t1, t2, f, Amp, envelope) type(tape_recorder), intent(inout) :: tape integer, intent(in) :: track real(wp), intent(in) :: t1, t2, f, Amp type(ADSR_envelope), optional, intent(in) :: envelope ! Period in seconds: real(wp) :: tau ! Time in seconds: real(wp) :: t real(wp) :: signal ! ADSR Envelope value: real(wp) :: env integer :: i env = 1._wp ! Default value if no envelope is passed tau = 1.0_wp / f do concurrent(i = nint(t1*RATE) : nint(t2*RATE)-1) t = (i - nint(t1*RATE)) * dt if (present(envelope)) env = envelope%get_level(t1+t, t1, t2) ! We substract 0.5 for the signal to be centered on 0: signal = 2 * (((t/tau) - floor(t/tau)) - 0.5_wp) * Amp * env tape%left(track, i) = tape%left(track, i) + signal tape%right(track, i) = tape%right(track, i) + signal end do end subroutine add_sawtooth_wave