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mitchco

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About mitchco

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  1. Hi, @mitchco
    a friend @DuckTollerwho probably already know introduced me to you. I would like your advice on the set up of my speakers. 

    Thanks in advance

  2. Hi @sig8I could not say. Perhaps reach out to the Audiolense product support forum: https://www.avnirvana.com/forums/audiolense-user-forum.89/
  3. Yes, mouse click on the big Filterbank buttons to switch filters. I could implement keyboard shortcuts, but I have not looked into it yet.
  4. On my website and in the operations guide describes, "Why Hang Loose Convolver." In the case of JRiver, the VST3 plugin is used for both Mac and Windows versions of JRiver. The setup and configuration is described in the operations guide.
  5. Hi @Confused Yes there are a number of industry specifications for what the operational room response should look like. Here are a couple: EBU Tech 3276, Listening conditions for the assessment of sound programme material: monophonic and two–channel stereophonic. ITU-R BS.1116-3, Methods for the subjective assessment of small impairments in audio systems Bruel and Kjaer, Relevant loudspeaker tests in studios in Hi-Fi dealers' demo rooms in the home etc. They are all fairly similar - flat response to 1 or 2 kHz and then a downward slope of varying degrees depending
  6. Hi @romaz and @Zaphod Beeblebrox My wife and I were mountain biking in Whistler last week when I wrote that and we just got back today as the massive heat is upon us. Roy, I recalled incorrectly. We tried a number of corrections and I forgot about the partial correction. I am not sure if this changed or not, but a good partial correction frequency would be between 300 and 400 Hz. I would also revisit the True Time Domain (TTD) correction as running it without and then with, you will see in the simulations that you can lower the low frequency group delay in your room wi
  7. Hi Roy, thanks for mentioning my name and service. It's too bad we never got to try a partial correction on your system. I am pretty sure this is the reason why you feel the the filters are not transparent. I have examined the filters extensively produced by Acourate, Audiolense and recently Focus Fidelity, and there are no technical issues with the filters produced. As a comment, I do notice low frequency preringing in the Audiolense frequency response chart you have posted. Can you post the step response chart so we can have a look. Or feel free to send me the measurement and I w
  8. Hi @BlimanThank you for purchasing my book. Attached are two procedures, one written by Uli and the example by Bob Katz. I have not had time to try these, but are on my way too long todo list. If you run into issues, Uli is helpful on his forum. I thought I would link Bernt's Audiolense forum as well since there has been a recent change of venue. Good luck! Time Alignment of Drivers by Sinewave Convolution.pdf time_alignment_by_sine_wave_convolution_-_example.pdf
  9. Hi @skatbelt Chris and a few others tried out the filters and I asked if anyone could hear a shift of the centre image when engaging the filter. The reports back are the that the centre image did not shift. So it would seem from a practical standpoint any driver matching differences are not audible. I listened to and measured fairly extensively while shifting the SR1a's in different positions on my head, including varying the angles. The SR1a is amazingly consistent through the range that fits comfortably. In Chris's article, I show a set of measurements where one was centered and
  10. Hi @Confused Agree with the preferred in room response. Consider a loudspeaker that measures flat in an anechoic chamber and then placed in a room. When measuring loudspeakers in typically reflective listening rooms the resulting steady-state room curves exhibit a smooth downward tilt. It is caused by the frequency dependent directivity of loudspeakers (i.e. cones and domes) - they are omnidirectional at low bass frequencies, becoming progressively more directional as frequency rises. More energy is radiated at low than at high frequencies. This is the cause of the downward tilt. W
  11. Hi Ted, when the source sample rate changes, the convolver would automatically load the filter with the matching sample rate. This is the traditional approach. But if using a resampler, than most folks will choose the highest sample rate filter and leave it at that.
  12. Hi @AudioDoctor please send an email to [email protected] and we can work out the logistics. Kind regards, Mitch
  13. Thanks Chris, that was a lot of fun! The website will take a bit of time to get setup. In the meantime, people can contact me at [email protected] and purchase the RAAL requisite convolution filters for US $250.00 via PayPal. Each filterset includes sample rates from 44.1 kHz to 384 kHz as stereo .wav files. As Chris described, there are 3 filtersets in this package. One neutral, one with bass extension and one with both bass and treble extension. Kind regards, Mitch
  14. Hi @cfisher, the website will take a bit of time to get setup. In the meantime, people can contact me at [email protected] and purchase the RAAL requisite convolution filters for US $250.00 via PayPal. Each filterset includes sample rates from 44.1 kHz to 384 kHz as stereo .wav files. As Chris described, there are 3 filtersets in this package. One neutral, one with bass extension and one with both bass and treble extension. Kind regards, Mitch
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