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- May 24, 2016
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Hello fellow ASR enthusiasts,
Just over a year ago @dallasjustice was kind enough to announce my new DSP calibration service here on ASR. Since then, 125 individuals have used my service to calibrate their sound systems. Coming back to my audio roots after decades in the software industry was fun, and I learned a lot.
I also accumulated independent measurement data from different loudspeakers in different rooms from around the world. Interesting patterns began to emerge, not only from the measurement data, but from client preferences for corrected in-room frequency responses.
Data analysis of the acoustical measurements pointed to a mathematical formula for applying the optimum amount of digital room correction to achieve accurate sound. This is what made (and makes) my DSP calibration service unique.
If interested, I hope to publish the results of the anonymized data in the next edition of my DSP book. Meanwhile, look for an upcoming Master Class video on Digital Room Correction on my website homepage, which will teach you about the process.
The need for a Hang Loose type of convolver began when I was working as a recording/mixing engineer in the 80’s. The band, producer, and I would huddle in front of the mixing console and monitors while I manually switched in/out various “premastering” 2 channel eq before the mix heads off to the mastering lab. It was our final opportunity to determine which eq gave us the best sound quality. It would have been great to have had something that was automated.
Then, 10 years ago, while creating digital room correction filters as a hobbyist, I wanted a convolver that allowed easy level matching and real-time switching between filters so I could determine which one I liked best. I could not find one that would accomplish this however. Ten years later, my DSP calibration clients were asking, how do I tell which filter sounds better? How do I know if it sounds better with or without the filter? So, the impetus for developing Hang Loose Convolver (HLC) had finally begun.
The capability to level match digital correction filters to bypass level and switch seamlessly between filters in real-time has been designed into HLC. https://accuratesound.ca/hang-loose-convolver-hlc/
Key Features:
• Designed for loudspeakers and headphones
• Seamless real-time switching between filters
• Autogain level matching with manual gain adjustment
• Import Acourate, Audiolense, Focus Fidelity, and REW filters
• Supports stereo 32-bit float wav FIR filters in a zip file
• Automatic filter switching based on host sample rate
• 6 Filterbanks x presets = dozens of FIR filters
• System-wide and app specific convolution capabilities
• Zero latency, uniform partition convolution engine
• Standalone application mode and VST3/AU plugin mode
HLC Operations Guide (PDF).
Tested (so far) with:
Roon on Mac and Windows operating in standalone mode with loopback.
JRiver on Mac and Windows using VST3 plugin.
Audirvana on Mac and Windows using AU and VST3 plugins
Qobuz on Mac and Windows using standalone mode with loopback.
HQPlayer on Mac and Windows using standalone with loopback.
System Wide Audio on Mac and Windows using standalone mode with loopback.
Popular DAW’s like Ableton and Reaper on Mac and Windows using AU and VST3 plugins.
Pic of HLC running in standalone mode on a Mac M1:
I am happy to answer any questions you may have.
Happy listening!
Kind regards,
Mitch
Just over a year ago @dallasjustice was kind enough to announce my new DSP calibration service here on ASR. Since then, 125 individuals have used my service to calibrate their sound systems. Coming back to my audio roots after decades in the software industry was fun, and I learned a lot.
I also accumulated independent measurement data from different loudspeakers in different rooms from around the world. Interesting patterns began to emerge, not only from the measurement data, but from client preferences for corrected in-room frequency responses.
Data analysis of the acoustical measurements pointed to a mathematical formula for applying the optimum amount of digital room correction to achieve accurate sound. This is what made (and makes) my DSP calibration service unique.
If interested, I hope to publish the results of the anonymized data in the next edition of my DSP book. Meanwhile, look for an upcoming Master Class video on Digital Room Correction on my website homepage, which will teach you about the process.
The need for a Hang Loose type of convolver began when I was working as a recording/mixing engineer in the 80’s. The band, producer, and I would huddle in front of the mixing console and monitors while I manually switched in/out various “premastering” 2 channel eq before the mix heads off to the mastering lab. It was our final opportunity to determine which eq gave us the best sound quality. It would have been great to have had something that was automated.
Then, 10 years ago, while creating digital room correction filters as a hobbyist, I wanted a convolver that allowed easy level matching and real-time switching between filters so I could determine which one I liked best. I could not find one that would accomplish this however. Ten years later, my DSP calibration clients were asking, how do I tell which filter sounds better? How do I know if it sounds better with or without the filter? So, the impetus for developing Hang Loose Convolver (HLC) had finally begun.
The capability to level match digital correction filters to bypass level and switch seamlessly between filters in real-time has been designed into HLC. https://accuratesound.ca/hang-loose-convolver-hlc/
Key Features:
• Designed for loudspeakers and headphones
• Seamless real-time switching between filters
• Autogain level matching with manual gain adjustment
• Import Acourate, Audiolense, Focus Fidelity, and REW filters
• Supports stereo 32-bit float wav FIR filters in a zip file
• Automatic filter switching based on host sample rate
• 6 Filterbanks x presets = dozens of FIR filters
• System-wide and app specific convolution capabilities
• Zero latency, uniform partition convolution engine
• Standalone application mode and VST3/AU plugin mode
HLC Operations Guide (PDF).
Tested (so far) with:
Roon on Mac and Windows operating in standalone mode with loopback.
JRiver on Mac and Windows using VST3 plugin.
Audirvana on Mac and Windows using AU and VST3 plugins
Qobuz on Mac and Windows using standalone mode with loopback.
HQPlayer on Mac and Windows using standalone with loopback.
System Wide Audio on Mac and Windows using standalone mode with loopback.
Popular DAW’s like Ableton and Reaper on Mac and Windows using AU and VST3 plugins.
Pic of HLC running in standalone mode on a Mac M1:
I am happy to answer any questions you may have.
Happy listening!
Kind regards,
Mitch
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