Recent content by Mitchco

  1. Mitchco

    [ANNC] Accurate Sound Calibration Services

    Apologise if this is the wrong forum to post, mods please move if required. https://accuratesound.ca/ My company offers accurate sound calibration services using DSP software such as Acourate, Audiolense and Dirac 2.0. Hope you are all enjoying the music in 2020! Kind regards, Mitch
  2. Mitchco

    Intrigued by JBL M2 speaker system .... Opinions please ...

    @iansr - if you are using computer audio, then perhaps consider Acourate software DSP. Here I used it to develop a 3-way linear phase XO, linearized and time aligned the drivers...
  3. Mitchco

    [ANNC] eBook on Accurate Sound Reproduction Using DSP

    Book review on Sound On Sound: http://www.soundonsound.com/reviews/book-review-accurate-sound-reproduction-using-dsp Related article I wrote on Computer Audiophile: http://www.computeraudiophile.com/content/712-mitch-provides-unique-perspective-vancouver-audio-show/ Hope you like it...
  4. Mitchco

    [ANNC] eBook on Accurate Sound Reproduction Using DSP

    Frantz, thank you. Sounds like a good journey! No pics, prototype unit. But it started off as this: http://www.critesspeakers.com/cornscala-style-c.html I replaced both the tweeter horn and compression driver, that now sits on top of the cab. The new waveguide is almost as large as the 90 x...
  5. Mitchco

    [ANNC] eBook on Accurate Sound Reproduction Using DSP

    Michael thanks. I see there are a few reading comprehension issues. Thanks for adding the context. To be clear, the first paragraph of the book description is: This eBook provides the audio enthusiast with an easy-to-follow step-by-step guide for designing a custom digital filter that corrects...
  6. Mitchco

    [ANNC] eBook on Accurate Sound Reproduction Using DSP

    Hi Amir, I hope you don't mind me making an announcement. I wrote an easy-to-follow step-by-step guide for designing a custom digital filter that corrects the frequency and timing response of your loudspeakers in your listening environment so that the music arriving at your ears matches as...
  7. Mitchco

    Redefine your budget room EQ 'flat' target curve to Harman's pro curve

    Thanks for the kind words Audiophile Bill. We are already seeing the future of DSP in products like: http://kiiaudio.com/en/tech-acou.html and http://www.tonmeister.ca/wordpress/2015/10/06/beolab-90-behind-the-scenes/ where DSP is being used to control the directivity of the speaker. Probably...
  8. Mitchco

    Redefine your budget room EQ 'flat' target curve to Harman's pro curve

    Interesting topic. Just passing along some info and impressions as I spent over 30 years with room curves starting with RTA's, 31 band eq's then TEF, 10 years of which working professionally in a variety of recording studios/control rooms and the last 5 years with digital loudspeaker and room...
  9. Mitchco

    Jitter vs no-Jitter

    esldude - have you tried these? http://www.cranesong.com/jitter_1.html bib - I will give your files a try Cheers, Mitch
  10. Mitchco

    Speaker/Room calibration

    Hey Bruce, Nice frequency response! Would be interesting to see the ETC's and Waterfalls as well. Are you enjoying the sound? I wrote an article comparing my untreated room, with acoustics treatments, and with digital room correction. What is novel is that I also recorded the sound of...
  11. Mitchco

    Speaker/Room calibration

    Yes, looks good! You certainly are on the right path. Does your mic have a calibration file for 90 degrees? I wrote a speaker to room calibration walkthrough that may have a few tips and tricks that may be useful. http://www.computeraudiophile.com/blogs/Speaker-Room-Calibration-Walkthrough...
  12. Mitchco

    Speaker/Room calibration

    To follow up, here is the stereo spec for the equilateral triangle (See Annex 1): RECOMMENDATION ITU-R BS.775-1* MULTICHANNEL STEREOPHONIC SOUND SYSTEM WITH AND WITHOUT ACCOMPANYING PICTURE...
  13. Mitchco

    Speaker/Room calibration

    Re: equilateral triangle The studios I worked in have the control room monitors configured in an equilateral triangle. I posted a few pics of control rooms with room treatment a few posts back. If you look, you will see that they are set up as an equilateral triangle. If you search online...
  14. Mitchco

    Speaker/Room calibration

    Bruce, agree with your approach 100%. I did similar, sans the analog eq, and really worked out well for me. I highly recommend a digital laser measurer. I use this one: http://www.amazon.com/Bosch-DLR130K-Digital-Distance-Measurer/dp/B001U89QBU A 20 KHz wavelength is just over 1/2"...
  15. Mitchco

    WAV vs FLAC revisited

    Hi rbbert. I explained in the post that I was comparing in the analog domain and measuring at the analog line output of my Lynx L22 sound card. The 2nd recording/measuring laptop had a -86dB signal to noise ratio using the onboard sound chip (i.e. line amp and ADC). That's the limitation...

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