Accor's sound is caused by vibration of the guardian, tongue, small brass. Inside the housing due to the play of wind-which require the strength of the players pumped-out.
Voice of Accor Acadian caused by the vibration of tiny brass valve inside the unit due to play through - out of the wind, which forces the player to use the pump - out.
The sound of the accordion is caused by the vibration of the brass valve small inside the machine due to play through - out of the wind, which requires the strength of players smoke. - out.