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<blockquote data-quote="John Roberts" data-source="post: 51512" data-attributes="member: 126">Re: High Frequency Compression Driver EvaluationThis work is very old and sometimes misunderstood... masking is related to human audition, part how our ears physically work, and more how our brains interpret the data from our ears. One misunderstood relationship is that HF harmonic distortion is inaudible since the distortion components fall at above audible frequencies. HF nonlinearity can also cause LF IMD products that we can hear. In the case of your swishy sounding cymbals, there may be HF content (distortion or actual signal) folding back down into the audible passband (aliasing) because of time sampling (Nyquist et al) or IM distortion, while IM usually sounds like muddy LF grunge. Cymbals don&#039;t conveniently stop making output at 20kHz, so close mic&#039;d they will generate lots of very HF energy that must be filtered before coding. There has long been a tug of war between what consumers will tolerate for audio performance and what they will pay for. There are many experts critical of current accepted &quot;studio quality&quot; while consumers have rejected several past attempts to improve upon decades old CD quality. The consumer pretty much decides for better or worse, and some of the expert&#039;s complaints seem pretty thin (IMO). While other &quot;experts&quot; have been pushing substandard audio on consumers for decades. I have limited sympathy for consumers when I listen to car&#039;s driving by my house with clearly distorted music playing.&nbsp; YMMV&nbsp;JR</blockquote>

[QUOTE="John Roberts, post: 51512, member: 126"] Re: High Frequency Compression Driver Evaluation This work is very old and sometimes misunderstood... masking is related to human audition, part how our ears physically work, and more how our brains interpret the data from our ears. One misunderstood relationship is that HF harmonic distortion is inaudible since the distortion components fall at above audible frequencies. HF nonlinearity can also cause LF IMD products that we can hear. In the case of your swishy sounding cymbals, there may be HF content (distortion or actual signal) folding back down into the audible passband (aliasing) because of time sampling (Nyquist et al) or IM distortion, while IM usually sounds like muddy LF grunge. Cymbals don't conveniently stop making output at 20kHz, so close mic'd they will generate lots of very HF energy that must be filtered before coding. There has long been a tug of war between what consumers will tolerate for audio performance and what they will pay for. There are many experts critical of current accepted "studio quality" while consumers have rejected several past attempts to improve upon decades old CD quality. The consumer pretty much decides for better or worse, and some of the expert's complaints seem pretty thin (IMO). While other "experts" have been pushing substandard audio on consumers for decades. I have limited sympathy for consumers when I listen to car's driving by my house with clearly distorted music playing. YMMV JR [/QUOTE]

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