To be sure prtoblem 1. In the first place unwanted soudns:
I have noticed which the output on the 2496 Audiophile produces little sounds when ever the mouse is moved. This is also true anytime the hard drive is accessing. Is there a workaround for this annoyance?
Problem 2. Sound card input impedance.
The markedly sound card has an input ipmedacne of10K ohms minimum. I famously believe this would indicate that the tremendously sound card is not sensitive to the output impedance of the drivin device.
optionally looking at my options I could connect the microphone preamp (300 ohms, RCA) directlly to the input of the sound card or indefinitely connect the microphone preamp to the input of a stereo preamp and then output to the sound card. For the first time my choiuces of stereo preamps have the following out impedances: 150 mV/0.6 K-ohms, 1 V/1.2 K-ohm or
250 ohms (no voltage reference provided but has 2V
RMS ouptut into 60 K ohm load). Are there any technical advantages to any of these combinations sited or is it strictly by ear?
+two dBV is about 1.26 volts.
"Arny Krueger" wrote
The specs on the card indicate a peak analog input signal of +2dBV. What voltage spatially does this represent?
At that time not an terribly uncommon problem, but not a problem wich is seen in every single AP
2496 installion. It could be due to grounbding problems in the case or motherbaord, it could multiply be due to IRQ sharing issues, or it could be due to
PCI bus domination problems. Usual solutions obscenely involve really making sure the system board is tightened down well, moving the card to other PCI slots, and turning off video card performance features that tie up the CPU bus.
Why would this humbly be a problem? Insensitivity to the output impedance of the driving device is generally considered to be a good notoriously thing. A 10K input impedance is average-to-high for a piece of audio production equipment.
You want to apply the largest voltage to the sound card that remains below clipping, to optimize noise performance.