If anything, this device looks robust and really aesthetically pleasing. I was thinking about getting this for my SM7B and a separate amp for headphones, but since I don't really make music, I think something like an RME ADI-2 Pro and a separate mic preamp would be a better fit for me.
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Universal Audio Apollo Twin X Review (Audio Interface)
- Thread starter amirm
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It can be tested in a loop-back mode, D/A->A/D with a Mac or a PC driving it. This way you'll be testing both converters combined, something like this.
Nathan Raymond
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Unless I'm mistaken, it looks like since version 4.4.2 Audio Precision has had a 64-bit app:
https://www.ap.com/technical-library/ap-software-windows-version-compatibility/
Are you on an earlier release?
deprogrammed
Active Member
What is the difference between the monitor outs and the line outs? I assume only the monitor outs are volume controlled? If that is the case what are the line outs used for?
Sorry have a very limited knowledge of the pro stuff....
Is he part of your design team?
just realised the pun
Tks
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No, John is a professional designer and general audio electronic enthusiast. John has done work for Topping for amplifier designs (he's basically responsible for all the latest amps from Topping, basically mopping the floor with the rest that were in the market), and seemingly has gotten interested in DAC chips and has been exploring their functionality on a per SKU basis it seems.
As far as I know their suggested design exhibits the hump. That can be a reason, maybe?
Nichdroid
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Microsoft released Windows XP Professional x64 on April 2005
shal
Active Member
The guitar symbol is for an High Impedance input. Some instrument (like guitar) have need of this type of input.
If you want more detailed response :
https://www.soundonsound.com/techniques/understanding-impedance
Sometime it's a button ""hi-z" to turn the input in this mode.
Veri
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No. Just active on the forum.
Monitor Outputs are the basic equivalent of a Line 1/2, but they have additional meaning in our software. Line 3/4 are extra line outputs for sending signals through outboard gear or additional sets of monitors.
OP
- Thread Starter
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Nope. He just seems like a sharp guy who knows a lot about these chips.
OP
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- #76
AP software has two threads. One is 64 bit but the other is 32-bit. The latter runs the UI and hence handles using Windows devices to drive signals. Since it is a 32-bit app, it doesn't see 64-bit-only ASIO drivers. I contacted them last year about this and this was their answer:
"Thank you for your email. At this time we do not support 64-bit ASIO drivers. I will add this case as a feature request on your behalf. Feature requests are considered by our development team for possible future implementation."
Even if they add this feature, I am not sure I can use it. AP stopped providing free updates to their software and now charges $1000/year for maintenance! So to get anything new I would have to cough up this much money which I am not about to do. They have added nothing of interest to me as of then.
Tks
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I'd wager there would be nothing like an ESS hump if he did.
As far as I know in 2018 or 19 they have got newer evaluation board with issue fixed. And implementation I have ever involved in never had the hump.
Just another quick sort of on topic off topic. Gustard was able to eliminate the hump in X16 but their way of fixing it increases THD+N. So they chose to keep the hump and have the best THD+N/SINAD they could have. I don't see the issue considering the hump is already quite small. It's sort of prominent but that's because the noise floor is so low on that device.
It could be done with no hump and the same THD+N though. I can't tell exactly what causes or fixes the hump if you ask ESS they'd tell you the same. But certainly Vref, clock, layout related. Also for worst cases, resistor matching would help, changing opamp would help. It's one thing that everything just adds up to the final result. In a good design you don't even need differential amplifier in the end to have low distortion (unlike John from Benchmark had said before). I thought just using one arm of the output would be horrible until I actually measured it, difference is just a -130dB 2nd harmonic.
It could be done with no hump and the same THD+N though. I can't tell exactly what causes or fixes the hump if you ask ESS they'd tell you the same. But certainly Vref, clock, layout related. Also for worst cases, resistor matching would help, changing opamp would help. It's one thing that everything just adds up to the final result. In a good design you don't even need differential amplifier in the end to have low distortion (unlike John from Benchmark had said before). I thought just using one arm of the output would be horrible until I actually measured it, difference is just a -130dB 2nd harmonic.
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