Method for producing tonewood for producing musical instruments using indigenous wood species of common beech, spruce, maple, ash, Douglas fir, pine, western redcedar or common hornbeam, wherein in a first step, the cut-to-size workpieces, boards or slats are separately stored in a climate chamber and are air-conditioned at temperatures between 20°C and 30°C, preferably 25°C, and at a relative humidity of from 45% to 65%, preferably 50% to 60%, particularly preferably 55%, until a consistent moisture penetration at a wood moisture of from 8% to 22% is achieved, in a second step, the boards or slats that have been removed from the climate chamber are coated separately by suitable means in order to prevent or reduce the absorption of oxygen from the atmosphere, in a third step, the air is evacuated from the coating by suitable means and the coating is sealed in a gas-tight manner, in a fourth step, the boards or slats located in the sealed and evacuated coatings are thermally treated in a heat treatment chamber, wherein the workpieces go through the following phases: - in a first phase, a first, successive heating of the workpieces to be treated is carried out up to a temperature of 140°C ± 10K; - in a second phase, a first heat treatment is carried out at a constant treatment temperature of 140°C ± 10K over a period of from 2 to 6 hours; - in a third phase, a second, successive heating is carried out up to a treatment temperature of from 150°C to 160°C, preferably 152°C to 158°C; - in a fourth phase, a second heat treatment is carried out at a constant treatment temperature that was reached at the end of the third phase, over a period of up to 10 hours; - in a fifth phase, a first, successive cooling of the workpieces to be treated is carried out down to a treatment temperature of from 130°C to 150°C, preferably 140°C; - in a sixth phase, a first conditioning of the workpieces is carried out at a treatment temperature of from 130°C to 150°C, preferably 140°C; - in a seventh phase, a second successive cooling of the workpieces to be treated is carried out down to a temperature of from 20°C to 30°C, preferably 25°C; in a fifth step, the treated workpieces are removed, in the sealed, gas-tight coating thereof, from the heat treatment chamber after termination of the heat treatment, and the gas-tight, coated slats or boards are optionally exposed to a vacuum in order to evacuate the gases and odorants produced, and the treated workpieces are stored in the sealed state at temperatures in the range between 18°C and 30°C, particularly preferably 25°C, over a period of at least 24 hours. - in a first phase, a first, successive heating of the workpieces to be treated is carried out up to a temperature of 140°C ± 10K; - in a second phase, a first heat treatment is carried out at a constant treatment temperature of 140°C ± 10K over a period of from 2 to 6 hours; - in a third phase, a second, successive heating is carried out up to a treatment temperature of from 150°C to 160°C, preferably 152°C to 158°C; - in a fourth phase, a second heat treatment is carried out at a constant treatment temperature that was reached at the end of the third phase, over a period of up to 10 hours; - in a fifth phase, a first, successive cooling of the workpieces to be treated is carried out down to a treatment temperature of from 130°C to 150°C, preferably 140°C; - in a sixth phase, a first conditioning of the workpieces is carried out at a treatment temperature of from 130°C to 150°C, preferably 140°C; - in a seventh phase, a second successive cooling of the workpieces to be treated is carried out down to a temperature of from 20°C to 30°C, preferably 25°C;