![](https://s3images.coroflot.com/user_files/individual_files/613050_yzw0mfgxbuzv0om8s8axffhga.jpg)
Initial testing was performed against a clock generator sketch. The unit performed as expected using the described controls.
![](https://s3images.coroflot.com/user_files/individual_files/613050_l5ydzsndld4l02wuoyoo39sio.jpg)
To introduce Midi to CV and Arpeggiation to the system, more circuit complexity is required.
![](https://s3images.coroflot.com/user_files/individual_files/613050_uqyxotbmhxxc9wub5rsv6ikek.jpg)
Multiple DACs can be cascaded in parallel to generate identical CV outs. i.e., one for patching to an oscillator to control pitch, and a 2nd to patch into a filter or envelope for modulation control. Additionally, I intend to add an additional array of DACs for converting MIDI Channel Pressure CC to control voltage output.
![](https://s3images.coroflot.com/user_files/individual_files/613050_ydl7nd6vz7flkgxe5llxxstod.jpg)
Upon initial testing, the gate output meets expectation; however, the CV isn't working. Closer inspection reveals that the spark fun DAC boards have the SMT DAC soldered upside down, thus resulting in failed performance. I have ordered a batch of 5 more DAC breakout boards from Ebay. When they arrive, I'll integrate them into the design, and move forward.....
![](https://s3images.coroflot.com/user_files/individual_files/613050_zge_yuref2syluvjbgno0hon0.jpg)
![](https://s3images.coroflot.com/user_files/individual_files/613050_pay87wmz0qtmmg3i2odikkycl.jpg)
![](https://s3images.coroflot.com/user_files/individual_files/613050_tdqz9thwj4drljevieqongrgj.jpg)
![](https://s3images.coroflot.com/user_files/individual_files/613050_zmxyrzudwqs_wfxpl5jsndbse.jpg)
I have fashioned a proto board that I can solder DACs to. I may place this unit into a proper 5U module if performance turn out tight and tidy enough. The DACs are 12bit which produces a fairly smooth sinusoidal waveform. So CV control will be accurate enough for 1v/octave pitch control.
![](https://s3images.coroflot.com/user_files/individual_files/613050_g68i3hvas_oghc9ce54s_8w6n.jpg)
gLike