Hi, I found your video very informative but there's one small, but important detail that you got wrong. At 19:17 you say that one can skip conversion of the differential signal to single ended when it's convenient. This is not true. The reason we use this conversion in the first place is not to generate a strong signal, but to get rid of very significant common mode distortion that's present at the output, but gets rejected when comparing the two signals. If you need a differential out and you want your signal clean, than you need to either split it again right after you've merged it, or use two DAC chips configured in a so called balanced mode. Merging differential signals is the only way to get clean output from your DAC and it cannot be ommited.
3 жыл бұрын
Thank you for the observation and this comment. I always feel like I forget to say something or misinterprate. The output has a common mode bias and therefore has to be removed by the output stage. Thats why high performance dacs with differential outputs have two mono dac's, as you mentioned. Thank you for comment, I will pin this here for future viewers.
@rhalfik3 жыл бұрын
@ Just noticed that you mentioned it in the second part. If anyone reading this wants a differential out for cheap and with good specs than ti's opa1637 is perfect. Opa1632 is close second. You can interface directly to pro sound equipment or class D amps with it.
@myadventures84 жыл бұрын
Your video explained more in 30 minutes than hours of watching hours of other videos... now I’m understanding why certain approach is needed. Thank you keeping it coming.
4 жыл бұрын
That's great to hear. Thanks :)
@VeauX19024 жыл бұрын
Exactly What I was looking for!
4 жыл бұрын
Awesome! Will do part 2 in future :)
@VeauX19024 жыл бұрын
Matej Blagšič looking forward to it! Doing a DYI USB DAC to complement my amp is something I want to learn. Thank you!
@obonneh4 жыл бұрын
@@VeauX1902 looking forward as well! great video!!
@Randy-nb6fw5 ай бұрын
Epic video, learned a bunch, im trying to use a ES9023P chip so design my own external dac that will steal the I2S signal from an ipod classic :)
@gamespot8527 Жыл бұрын
Just awesome
@AceHardy5 жыл бұрын
👑
@frontier93 жыл бұрын
Basically I'm the same, built quite a few power supplies, various audio amps, then built some headphone amps and still designing that and now I'm getting to the DAC ... for the same reason.
@lutetube884 жыл бұрын
Very nice job!
@MrGreggerypeccary4 жыл бұрын
Fantastic.
4 жыл бұрын
Thank you :)
@MartinManweiler Жыл бұрын
I bought a PS Audio GainCell DAC and broke it and they fixed it for me. I am using USB input now but it has i2s inputs and they are making a streamer now that will have those. I am not very technically minded but I have a feeling it should sound better.
Жыл бұрын
Since both signals are digital I would say it depends. In this domain, clock accuracy and synchronisation is the important part. This would mean, that the quality of i2s output of a streamer has to be better that that of the usb-i2s converter. In my view, both could be excelent. I myself have a great sounding DAC plugged into usb with amazing measurements to show for. I would say that in higher end, DAC chip architecture, output processing and of course your amp will matter much more than how that digital signal is delivered to your DAC processor. Having a DAC with i2s input is a convenience for sure, but I would look into other parts of your system for improvements first. But as anyone in this hobby knows, you do you.
@MartinManweiler Жыл бұрын
@ thanks for the reply I just saw this! Yeah the guy I get most of my stuff from has a blusound node going to an m scaler and a Dave (and then a $400-500k system at the end of that. Will have to listen to it because vinyl sounds better with my current setup. The streamer I hope will be available at the end of the year but as far as recent changes tonight I got two good power cables and we put the speakers in spikes and little metal things for the hardwood and little changes like that made a difference. I’m with you on doing you; at this point I try to stay off Reddit for that reason. Too many salty people (all over lol) and how you spend your money is entirely up to you! XD. Luckily I have a Mom that’s into this and I live at home so she buys most things lol.
Жыл бұрын
I agree. When I bought my headphones and the rest of the stack, some coworkers were surprised I spent that much on an audio setup. I asked them if they have a TV and what they spent on it (turned out it's the same as my whole stack with heaphones). I said I don't have a TV and I spend the same amount on a good music listening setup. Granted, there are some parts of any hoby that a "community" can agree on is overpriced or not a good deal, but in the end personal taste and different priorities win (let's say design of a device, which does not impact sound, but the good feels in one's heart :D). (oh, and of course, financial responsibility :P)