Demian Martin schrieb:
I have tested a number of soundcards and while the EMU 2020 has issues
(serious jitter and noise from the USB interface) I can recommend the ESI
Juli@ as having flat response and good SNR up to 90 KHz. It's a PCI card, no
USB. I have measured the performance of FM MPX adapters and tested FM
Transmitter performance with one. You get 24 bit at 192 X 2 continuously as
long as you want. With some simple pre-filtering and gain you should be able
to get some 60 KHz signal at very low levels. With a deep FFT I get to -130
dBFS easily. With the demo board for the AKM AK5345a I am getting better
than -160dBFS. That has SPDIF out. Depending on the filter selection, most
chips have a flat option, there is no significant phase shift up to
frequencies close to the cutoff.
Interesting. From time to time I consider to make my own card.
Where can I find this demo card you mentioned?
I have tried and dumped a number of other sound cards that were dead ends.
The ESI Juli@ is usually around $120.
As far as I heard the ESI is a little better than the EMU0202.
- Henry
--
ehydra.dyndns.info
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