Porque me profesor me semi abandono. Y claramente el oído es un elemento que me limitaba para seguir avanzando en harmonía. Tome gym era una solución barata, motivadora y divertida para mejorar mi oído. Y mejorar el oído hace que la música sea más fácil y en consecuncia divertida y enriquecedora

the way I see it, ear training of some sort should be an integral part of any working musician's routine, like with regular physical exercise one does not NEED to go to a gym in order to exercise it is just convenient and it has a social aspect to it, same here, one can get a great ear training just by playing by ear daily or transcribing in a way that would be equivalent to training in an old fashioned way of situps and pullups, ToneGym is like those machines in the regular gym they are convenient and have a degree of 'enjoyment' about them because they are gentle on the body... I still think though that the best ear training practise would be playing things by ear, transcribing and singing (equivalent to old school training and free weights)

La enseñanza de la teoría y el entrenamiento auditivo en un ambiente de clase no es fácil, especialmente cuando hay una gran disparidad de habilidades en el cuerpo estudiantil. Una herramienta como ToneGym puede permitir a los estudiantes avanzar a su propio ritmo, pero aún puede requerir otras fuentes para establecer algunos principios fundamentales.

For me, ToneGym is fun, challenging and raises my ear-training skills in weaker areas. It is an especially good thing to do when we are in extended (never-ending) COVID lockdowns!

@yooval mann very well stated.