so he would pay for the broken machine ?
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Itās 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 itād probably take 20-30 minutes tops but itās also risky so a high bench fee seems fair.
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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
This again! Stop. Extra flattering eq for Digitakt. It doesnāt make it higher class! And itās mono.
You probably donāt know how to use OT correctly. It has been proven many times that OT is very flat, without noticeable loss.
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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.
Please read this :
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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 chipsā¦ might give it a try soonā¦so then audio out will be digital with no conversion lost at all.
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Iām interested in this mod (upgrading conversion at all I/Os or digital out).
Where can I find more info? Is there a clear BOM and guide somewhere? (Stream is not longer linked)
Iām surprised anyone would want to make the OT master clock for your entire audio setup. I was under the impression that the clock source was what determines ājitterā and that sort of thing and thatās why āgoodā audio interfaces cost so much?
Actually when things are self clocked usually there are 0 issues, the good clocks are not only great reference sources but also amazing at locking to external less accurate clocks without errors. I wouldnāt know how the OT fairs with this, but I can say Iāve used old yamaha receivers, minidisc players etc over spdif on high end interfaces and they all lock as slave to these older devices effortlessly. Alot of the āclockingā issues people experience are from user error and daisy chaining stuff.
Also, clock from a computer is generalyl the least stable. It improves a bit as computers get faster, but itās still baked in to the way USB works.
The Octatrackās clock is about as stable as possible with MIDI so it makes a pretty good master clock, but on top of that itās uniquely picky about external clock, and Iāve personally had issues even when the clock source was MORE stable than the OTās internal clock. Mostly with pcikup machines (the usual āoverdub abortedā error), but it also causes clicks with any looping audio that doesnāt use time stretch (Iāve had a few issues with timestretch on, too, but I usually keep it off so I donāt know how common those are).
Even when Iām not using the OT as the master clock for my setup I donāt sync it to external clock - in that case, Iāll send transport and tempo change messages from another sequencer to keep it in time with the master clock - itās a bit more cumbersome but works better.
This is still the best techincal explanation of the problem with USB, I think:
The Octatrack is a special case, though, because itās really just too sensitive to work well with external clock - it wants sample accurate timing and MIDI canāt do that.
do you still have the files? they are no longer online 
Heyā¦ sorry, I couldnāt find the samples on my disk. After three years, I can say modding the OT is not worth it. If you want pure digital outputs, I would suggest going another route, perhaps a Digitakt?