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Bob Stern

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About Bob Stern

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  1. @bibo01 & @GMG: I expect Jussi can give you a more focussed answer if you state whether you used a USB mic. If so, the measurement definitely was made at 48 KHz.
  2. Instead of using HQP Client to switch HQP Desktop's input to streaming from BlackHole, you might try a shell script. I use the following AppleScript, which simply runs a shell script. (10.0.x.x is the IP address of the computer running HQP Desktop, or else localhost if Desktop and the AppleScript are running on the same Mac. Take care to append a space to the IP address.) use scripting additions set shellCmd to "/Applications/HQPlayer4Client.app/Contents/MacOS/hqp-control2 10.0.x.x " set shellCmd to shellCmd & "--set-transport 5 'audio:default/44100/2'"
  3. Anyone read Guillermo's album notes and brief bio? He's only 13! Mario, did he really write the notes without adult help? If so, his literary intelligence is just as high as his musical intelligence!
  4. Any DAC uses voltage regulators to reduce the input voltage to various voltages needed for different chips and sub-circuits. Increasing the external power supply voltage merely increases the voltage drop imposed by each of the voltage regulators, thereby greatly increasing heat dissipation in the DAC and reducing its life.
  5. @Miska: Does your recommendation against narrower bandwidth dips apply to the bass? What room correction software are you using?
  6. I'm not making a request; I'm merely offering a suggestion on how to make the REW graphs more useful to you. A graph in which there's lots of white space above and below the curves would be more useful if you zoom in so that the curve occupies most of the displayed Y-axis. Likewise, if you're examining the bass, you can see more detail by reducing the upper frequency limit on the X-axis. Also, when running the algorithm to determine bass EQ, the REW developer recommends setting smoothing to Variable instead of 1/12 octave. "Variable" applies almost no smoothing in the bass and i
  7. Hi @Jud! What Mario Bon meant by 1-to-1 relationship (also called 1-to-1 correspondence) is that for a given frequency magnitude response, there is exactly one minimum phase complex frequency response and exactly one linear phase complex frequency response that will produce that magnitude response. Also, I believe you should not assume that applying minimum phase EQ to correct bass resonances in your room will destroy the linear phase characteristics of your speakers. At 200 Hz the wavelength is 5 feet, so 1/4 wavelength at which reflections cancel the original signal
  8. REW graphs & axis: In REW, if you hover the mouse near the upper left corner of a graph, + and – buttons appear allowing you to expand/compress the scale. Above the upper right corner of the graph are 4 icons, one labelled Limits. Click that and then type your desired numerical upper and lower limits for the X and Y axes. Your graphs would be much more helpful if you expand the vertical axis to show the full range. In the horizontal axis, if you're focussing on the bass response, you should set the upper limit of the graph to the upper bass frequency of interes
  9. In my opinion, the audiophile "truism" that inserting a preamp between a source and a power amp adds some benefit is a myth intended to sell more equipment. If the output stage of the DAC were somehow inferior to the preamp, it would be no less inferior with the preamp inserted. At the other logical extreme, how about cascading several preamps to get even more of the alleged benefit?
  10. Definitely do not insert analog attenuators between the RME DAC and a power amp. The hardware auto reference level will automatically insert the optimum analog attenuation to maximize the digital bit depth, i.e., minimize the amount of digital attenuation.
  11. Conflating "recent" with UDM is misleading. Edge, UniFi and UDM are product ranges distinguished by intended user (pro, semi-pro & consumer, respectively), not by newness. The UniFi and Edge routers, switches and access points do not require a cloud account or remote access, as I stated above. (In fact, the Edge Routers had a significant firmware update 4 months ago and a dnsmasq security update 2 months ago. They did not impose a cloud account requirement, and they turn off by default phoning home with usage statistics.) The branding waters are muddied by UniF
  12. Like you, I've read reports of peculiarly heavy use of swap storage on a 8 GB M1 Mini when the programs running didn’t seem to be using anywhere near that much RAM. So 16 GB seems safest.
  13. In case anyone's wondering, Ubiquiti Edge and UniFi routers and access points do not require use of cloud servers or registration on Ubiquiti's website. Although Ubiquiti's marketing encourages you to buy a Cloud Key device to configure a UniFi network, they actually have a free UniFi desktop program that does the same thing without accessing Ubiquiti's servers. (Edge routers and switches don’t use a desktop program. Like most routers, their configuration GUI is built-in as an http server you access from a browser on the local network.) I'm not defending Ubiquiti by
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