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Junior Varsity
X32 Discussion
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<blockquote data-quote="Per Søvik" data-source="post: 83122" data-attributes="member: 1285"><p>Re: Monitor out noise</p><p></p><p> The first one was for reference, as a calibration so to speak.</p><p></p><p>What you see is the internal noise of the computer, I can't seem to get rid of it even though I route directly from the asio driver for the interface (Behringer UCA222), and it is audible from the internal sound card output. I guess I could fix it if I disabled everything, but I don't use the computer for this kind of measurement, so it is not normally a problem.</p><p>The peaks you see are under -72dB relative to -20dBu, in other words less than -92dBu, and thus not masking very much that is clearly audible at normal listening level gain. The -84dBu spike at 6KHz on your consoles would have been visible though.</p></blockquote><p></p><p> I always run at 44.1, both to be compatible with playback and because I prefer recording at 44.1 unless recording for video. I know there is a small latency price to pay, but I'm hardly ever doing any in-ear monitoring, so that is not really an issue.</p><p></p><p> It is all inside my computer, so no difference.</p><p></p><p>Yup, clean, green and fresh 240V straight from the power plant, going through a UPS just in case.</p><p></p><p></p><p>As I stated, rather pointless exercise because my measuring set-up of the day simply wasn't good enough. </p><p>However, turning the PRX535 to full gain on mic input should give a gain of 160 dB between dBu in and dB/1m SPL, thus translating a -84dbu spike into 76 dB SPL/1m, which is something I should be able to hear.</p><p></p><p>Edit: There is a gate on the PRX that might actually not open for such a weak signal even at full mic gain, so probably not the best speakers to verify absence of low level noise. :blush:</p><p>[/QUOTE]</p>
[QUOTE="Per Søvik, post: 83122, member: 1285"] Re: Monitor out noise The first one was for reference, as a calibration so to speak. What you see is the internal noise of the computer, I can't seem to get rid of it even though I route directly from the asio driver for the interface (Behringer UCA222), and it is audible from the internal sound card output. I guess I could fix it if I disabled everything, but I don't use the computer for this kind of measurement, so it is not normally a problem. The peaks you see are under -72dB relative to -20dBu, in other words less than -92dBu, and thus not masking very much that is clearly audible at normal listening level gain. The -84dBu spike at 6KHz on your consoles would have been visible though.[/QUOTE] I always run at 44.1, both to be compatible with playback and because I prefer recording at 44.1 unless recording for video. I know there is a small latency price to pay, but I'm hardly ever doing any in-ear monitoring, so that is not really an issue. It is all inside my computer, so no difference. Yup, clean, green and fresh 240V straight from the power plant, going through a UPS just in case. As I stated, rather pointless exercise because my measuring set-up of the day simply wasn't good enough. However, turning the PRX535 to full gain on mic input should give a gain of 160 dB between dBu in and dB/1m SPL, thus translating a -84dbu spike into 76 dB SPL/1m, which is something I should be able to hear. Edit: There is a gate on the PRX that might actually not open for such a weak signal even at full mic gain, so probably not the best speakers to verify absence of low level noise. :blush: [/QUOTE]
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