Treble and bass audio controls w/o phase shift?

In summary, audio equipment commonly uses RC networks for simple treble and bass controls. These networks have a phase shift of a radian per neper, which is equivalent to 6.6 degrees per dB of boost or attenuation. However, there are analog treble and bass control circuits that have no phase shift. Additionally, active filters can be used to selectively pass desired frequencies. However, even with active crossovers, there is still some phase shift present. The only way to achieve a "phaseless" boost at certain frequencies would be through digital processing, but this can also introduce phase shifts if not designed properly. Despite the belief that "all digital is bad," some audiophiles may still be interested in a product that
  • #1
Bob S
4,662
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Simple treble and bass controls in audio equipment use RC networks that have a phase shift equal to a radian per neper, or about 6.6 degrees per dB of boost or attenuation. Are there analog treble or bass control circuits that have no phase shift?
 
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  • #2
Could you use active filters to pass the frequencies you want? Maybe use a high pass filter to attenuate the low frequencies and a low pass to attenuate the high frequencies.
 
  • #3
Active crossovers still give some phase shift. The only "phaseless" boost at certain frequencies would have to be done digitally, but there are phase shifts involved there if not designed properly. Unless applying a DSP from a digital source to the next component, a DAC/DSP/ADC seems to be overkill for bass and treble only.

Still, some audiophiles might buy it, in spite of the fact that "all digital is bad", selling something that can dynamically cancel out the natural phase shift caused by woofer woofer movement ("Doppler effect") could be a big hit.

Just a matter of adding in your bass and treble controls while you are at it. :P
 

1. What is the purpose of treble and bass audio controls?

The purpose of treble and bass audio controls is to adjust the levels of high and low frequencies in audio signals. This allows listeners to customize the sound to their preferences and improve the overall quality of the audio.

2. How do treble and bass audio controls work?

Treble and bass audio controls typically use filters to adjust the levels of high and low frequencies. These filters can either boost or cut certain frequencies, depending on the user's settings.

3. What is phase shift and why is it important to have audio controls without it?

Phase shift is a delay in the timing of audio signals. It can cause distortion and affect the balance of sound. Having audio controls without phase shift ensures that the sound remains clear and balanced, without any unwanted delays or distortions.

4. Can treble and bass audio controls damage my speakers?

No, treble and bass audio controls do not have the ability to damage speakers. However, if the controls are set at extreme levels, it could potentially cause distortion or overload the speakers. It is important to use the controls in moderation and not at maximum levels.

5. How do I know which settings to use for treble and bass audio controls?

The settings for treble and bass audio controls are subjective and depend on personal preference. It is recommended to start at a neutral setting and make small adjustments until the desired sound is achieved. It is also helpful to test different types of music to find the best settings for each genre.

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