sumotoy
Well-known member
Here's my DAC, I'm using in studio always from about an year and of course uses a Teensy as well.
It uses an FPGA for clock syncro and D/A uses old Non over sampling D/A's (4 x channel) that can work at 192Khz thanhs to the hard work of FPGA (normally are stuck to 44.1-48Khz).
Teensy drive 2 digital receivers and (though 2 linear optocouplers) constantly monitor output and collect infos from FPGA,Receivers, drive Tube supply (when off for more than 5 min it just turn off supply), create the Tube Bias and some other stuff.
There's a couple of double triode Tubes to have more pump when I use DAC for drums.
I worked about 2 years on it to get the right sound, using many NOS dac since I prefere a lot over any oversampling modern stuff, so I tryed any type of configuration before this unit and at the end it's a part of my sound.
It uses only linear supply and very low noise regulators, it has a lot of trasformers because many sections are decoupled and all analog path has it's own separate ground, I have to avoid any possible noise or buzz since most of the time the output goes into a path were compressors will reveal everithing if present.
Now I'm building another one more compact to have same sound at home, of course simpler and will share to everyone.
Here's the front panel of the prototype, it's more a digital audio preamp with output for 3 spk and separate headphone, bla, bla.
Thanks Paul for Teensy, I cannot build this without it! Teensy Rock!
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