Hello! I wanna built a device that will receive midi from serial and USBmidi. The device will be used to trigger a Roland TR-808 Drum Machine. To trigger a voice on TR-808 you need to drive 2 different voltage signals: 1) Trigger signal ( Gate ) : this should be a +5v with 1ms width signal. The device i will use to do this is a daisy-chain of 2 74HC595 chips that will give me 16 digital outputs. 2) Velocity Signal ( CV ) : This should be a a signal with 1ms width and voltage beetwen +5v.....+15v. The signal defines how much hard you hit a drum instrument in real drums. In midi velocity is defined beetwen 0 min and 127 max value. So for 0 Velocity i need +5v ( below +5v there is no sound ) and for 127 Velocity i need +15v. The hardware i need to use to make this possible is only a DAC. ( no pwm and other low cost modules can used on this. ) The DAC i am planning to use is the AD 5360 from analog devices. It is a 16-channel,16-bit Voltage output DAC. http://www.analog.com/en/products/digital-to-analog-converters/da-converters/ad5360.html Each instrument accept those 2 signal simultaneously. Any help on progamming this?? I am good on schematics and hardware design but i am not good on programming so i need help!! Best Regards
