This version finally introduces the possibility for arbitrary waveforms. Modelling routines: bipole and dipole: Arbitrary waveforms: Time-domain modelling can new be done for any arbitrary piecewise linear waveform, in addition to impulse (signal=0), step-on (signal=1), and step-off (signal=-1) responses. User-defined bandpass filters can now be applied to the frequency domain result through user-provided functions. Merged loop into bipole; there is no need for a special routine. Simply use bipole with msrc='b' and mrec=True for the same effect. New prints (if verbose): The source/receiver types are new printed. The signal/waveform is new printed. New function empymod.utils.check_waveform, to check the waveform. New deprecations (will be removed in v3): empymod.model.loop will be removed in v3. empymod.utils.check_bipole: New signature, it now returns also the src/rec field and type; old signature will be removed in v3. empymod.utils.check_time: New signature, it now also returns the signal; old signature will be removed in v3. empymod.utils.check_time_only: New signature, it now also returns the signal; old signature will be removed in v3. Bumped the minimum requirements to: Python 3.11 NumPy 2.0 SciPy, Numba, libdlf, scooby (without minimum version)