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mitchco

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About mitchco

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  1. @nocrapman desktop speakers that sit on the desk or desktop speakers that sit on stands behind the desk? Distance between the speakers and your ears sitting at the desk? Indeed this is a tough category as bass response is typically the big issue. 8" woofers will give you the bass, but need to be put on stands behind the desk and far enough back for the woofer and tweeter to properly integrate. Smaller speakers on the desk need to be either at ear height or sitting on the desk angled up towards your ears. But may lack bass response. Digital Room Correction (DRC) can make
  2. Love the Rythmik subs. I have a pair of F18's. Fantastic transient response. Mine are time aligned with the mains. Depending on size of your room, there are models that have more output like FV18 or FV25HP. One of the few sub manufacturers that publishes meaningful specifications, backed up by 3rd party independent measurements.
  3. You want to balance everything as best as possible towards whatever target curve you are interested in before AL. Otherwise, you will be getting too much filter attenuation. So wherever you can make gain adjustments, using line level attenuation, amp input level controls, or Lpad's on the high sensitivity speaker. If it is a compression driver, don't forget a protection cap in series.
  4. @Magic my suggestion to you would be to hire a pro installer that has some experience in this area. Your space requires a real sound design and therefore takes time and effort to come up with a design that meets your requirements and will sound good. For this kind of space it boils down to two types of speakers. One is a speaker with wide directivity to cover as wide an area as possible or narrow directivity speakers that can be focused at a particular location. These may be different for each of your three rooms. I provide this link as examples of both wide and narrow
  5. Hi @Iansr yes, you want to get the sub(s) level balanced with the rest of the mains to be relatively the same level to match your target curve before applying DSP. Same applies for the rest of an active system using digital XO with an amp per driver. In my triamp system, I try and balance all driver levels to more or less be representative of the target curve I am going to apply. Why? I don't want unnecessary attenuation in the correction filter because I did not have one (or more) of the drivers level matched. For example, if I had the subs turned up too loud, then in order to hit
  6. Very cool! I think you have the speaker locations already figured out :-)
  7. @jamesg11 and @ecwl I do both. For some folks, it is wherever they have plunked down their system, for others we can work out room modes and try and find an optimal placement that tries to avoid deep nulls or peaks. Tools like REW's Room Simulator or AMROC's Room Mode Calculator can assist. I like the latter calculator as a) one can hover the mouse cursor over a mode and it will output a tone at that frequency so you can hear it in your room (an ear enlightening experience) and b) one can get a great visualization of the room modes in the Room 3D View of the calculator as you hover
  8. Hi @bluesman for sure. I use a multichannel AD DA converter in my triamp setup using digital XO's. For MC setups, I recommend a multichannel interface, like from this fine list: https://yabb.jriver.com/interact/index.php/topic,126507.msg876687.html#msg876687 ASIO is recommended wherever possible. What @Iansr was looking for is a specific solution for his existing 2 channels DAC's... Some 2 channels interfaces can be synchronised together with a word clock. As mentioned, ASIO4ALL will do it in Ableton, but I believe this is specific to Ableton's software.
  9. Instructions for Combine multiple audio interfaces by creating an Aggregate Device on the Mac. This article on Ableton suggests that it can also be done with ASIO4ALL on the PC. I did not look closely and have not tried it myself: https://www.noterepeat.com/articles/how-to/101-ableton-live-using-multiple-interfaces
  10. [email protected] on "bracketing" in on what you prefer. Re: longer excess phase correction of at least 4 cycles in the low frequency makes the bass sound dramatically better and should really be the minimum setting. Excellent! You are training your ears and hearing it! Re: "I ended up selecting the filter setting that has the highest vertical spike in the step response" Well done! Re: I am really appreciating the full range frequency and phase correction for the system because there is something special about the additional phase coherence/high frequency p
  11. Hi @Trdat, sorry for the delay as I am not getting email notifications on new content... To answer your questions. These are more along the lines of speaker design than room correction... 1). re crossover point. Without seeing the sweeps of both the subs and Deltalites, it is almost impossible to recommend a crossover point. But, having said that if you have an f3 of 51 Hz then it would be around there. Just make sure the subs are actually "subs" and can make it down to or below 20 Hz. In addition, I would use a room mode calculator to identify your room modes and taki
  12. @asdf1000No, what I am saying is that PC's can easily process 65,536 (or even 131,072) FIR filter taps. Whereas most h/w solutions are limited to 8096 taps or less per channel (typically 1024 or 2048 FIR filter taps). In the case of Dirac, on the PC, we don't know how many filter taps are used as Dirac uses "mixed phase" filters which are a combination of IIR filters for low frequencies and FIR filters above a certain frequency. It is a black box and as mentioned in the article, you can read about Dirac's tech.
  13. Awesome!! Mathematically speaking, aside from one's preferred tonal response, there is an optimal or "ideal" convolution filter for each set of speakers and room combination. You can see an example of that it in the charts for the "ideal" response in this article: Let's have a look at the "ideal" step or timing response in particular: Preringing is mostly a benign artefact. You have to know what to listen for in order to hear it, even though there maybe some preringing showing in the chart, you may not hear it. How "vertical" the spike
  14. Chris, a nice technical upgrade with lower noise, lower distortion, more resolution and selectable sample rates, plus an ASIO driver for Windows! I think this would be a good upgrade for diyAudio folks designing/building loudspeakers, measuring distortion profiles, etc. But for measuring speakers for digital room correction purposes, unlikely to see any differences in the measurements as the UMIK-1 already has very good resolution. Hope you are enjoying the music!
  15. That target is from Bob Katz and James Johnston's research and listening tests. It is a (small) variation of the ITU-R BS.1116-3 standard. But falls within the range of operational room response curves.
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