... maximum at 6 KHz.* Built-in 13Bit D/A converter, 12Bit PWM output with good sound quality* Optional PWM ... output connect to amplifier for high volume* Support wav audio format. (8Bit / 16Bit, mono, wav)* Sampling rate support 6KHz,8KHz,10KHz,12KHz, ... clock, learning machine, therapeutic apparatus,telecommunication, Reversing radar and all kinds of automatic control devices etc.Test board and progrmmer ...