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Time and phase coherence – live, MQA, playback, overall

This is a very complex topic. It is not fully researched which and how the issues directly influence or correlate to the subjective perceived sound quality. However the overall time and phase coherence influences the […]

Wilhelm   Allgemein
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Faint sounds of distortion

Did you ever hear the noise produced by an audio amplifier under measurement, with resitors instead of loudspeakers connected? There is a lot of buzz, and sometimes hum. If components in an audio circuit produce […]

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Flaws in audio at listening position – stereo channel left and right level correlation

Theory explanation    Stereo, a method of sound reproduction We described stereo effects to some extend already in the criteria stereo capability and Frequency response channel correlation. Stereo is a method of sound reproduction that […]

Wilhelm   Allgemein
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Digital HiFi Adventures – and Questions

Between 1990 and 2005 I worked with digital controllers for custom made horn systems in critical sound reinforcement situations. The convenience to have a variety of filters, delay and equalizing selected via a nice graphical […]

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Flaws in audio at listening position – frequency response channel correlation

 Text to speech  –  TestHiFi blog: Flaws in audio at listening position – frequency response channel correlation Theory explanation    Frequency response channel correlation at listening position We described the frequency response amplitude level or […]

Wilhelm   Allgemein
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Flaws in audio at listening position – frequency response

 Text to speech  –  TestHiFi blog: Flaws in audio at listening position – frequency response Theory explanation    Frequency response amplitude drops or peaks at listening position Frequency response is used to describe the output […]

Wilhelm   Allgemein
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Listening Position Frequency Response

 Text to speech  –  Listening Position Frequency Response Does measuring amplitude versa frequency (frequency response) at the listening position make sense? I wrote about measuring at the listening position before, and covered room influence etc […]

David   Allgemein
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Flaws in audio systems – stereo capability

 Text to speech  –  TestHiFi blog: Flaws in audio systems – stereo capability Theory explanation    Systems with one channel only or summed up left and right channel. Such systems are incapable of providing stereo […]

Wilhelm   Allgemein
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Phase and Time 3

 Text to speech  –  TestHiFi blog: Phase and Time 3 Phase and Time – Time Domain Response, Step Response In my first blog „Phase and Time 1“ I focused on amplitude and phase shown as […]

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Flaws in audio systems – aurally weighted intermodulation disconsonance

 Text to speech  –  TestHiFi blog: Flaws in audio systems – aurally weighted intermodulation disconsonance Theory explanation    Frequencies with higher level of upper order harmonic distortion compared to level of lower order harmonic distortion […]

Wilhelm   Allgemein
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