DIY audio upgrade to OT

[Sternenlicht]

@robjac

This wasn’t something he had ever done before; but he was well regarded among some modular heads here in my town.

so he would pay for the broken machine ?

[Supercolor_T-120]

@robjac

OPA1644

It’s one dual op-amp per pair of inputs and outputs, right? If so, OPA1644 prices on Mouser right now would make it about $15 for all four for a commercial operation buying quantity, or about $21 for someone who just bought enough to do the mod. For someone with good tools and rework skill it’d probably take 20-30 minutes tops but it’s also risky so a high bench fee seems fair.

[webber]

Yeah, the Digi sound is unfortunately a class higher than the octatrack. When I put the sound into octa it sounds like decreased mp3 quality

[sezare56]

@webber

Digi sound is unfortunately a class higher than the octatrack

This again! Stop. Extra flattering eq for Digitakt. It doesn’t make it higher class! And it’s mono.

@webber

into octa it sounds like decreased mp3 quality

You probably don’t know how to use OT correctly. It has been proven many times that OT is very flat, without noticeable loss.

[webber]

That was a simple A/B Test. Sound directly from OT and from sample editor in OSX. What could go wrong? My A/D/D/A ? Apogee Rosetta i think its quality is quite good.

[sezare56]

Please read this :

OT - sound quality

OT and I got friends. Nevertheless I need more time to evolve a fluid workflow, but I think some hard nuts are already cracked. Thanks guys for helping! What really keeps me thinking at the moment is - after watching Cuckoo´s video where he´s comparing the OT (…MK1) with the Digitakt ( https://www.youtube.com/watch?v=HmA2vSoYL94 ) - the overall worse sound quality of the OT: Even before this issue was quite obvious to me, but hearing the units side by side, you might get it - the OT it´s pr…

[maxmatteo]

so this mod seems to be around for a while, any new conclusions if its worth it?

hooking into the i2s signals from the dsp to the dac should be possible with pogo cables on the cirrus dac. from there ifeed them i2s signal into adat converter chips… might give it a try soon…so then audio out will be digital with no conversion lost at all.