Cookie preferences
This website uses cookies, which are necessary for the technical operation of the website and are always set. Other cookies, which increase the comfort when using this website, are used for direct advertising or to facilitate interaction with other websites and social networks, are only set with your consent.
Configuration
Technically required
These cookies are necessary for the basic functions of the shop.
"Allow all cookies" cookie
"Decline all cookies" cookie
CSRF token
Cookie preferences
Currency change
Customer-specific caching
Individual prices
PayPal payments
Selected shop
Session
Comfort functions
These cookies are used to make the shopping experience even more appealing, for example for the recognition of the visitor.
Note
Store Locator
Statistics & Tracking
Affiliate program
Google Analytics
Track device being used
The quality of the input signal is essential for a perfect sound experience and an optimal signal processing. However, especially in OEM integrations the signal is mostly already manipulated by the OEM head unit.
In these cases our Input Signal Analyzer (ISA) with its integrated InputEQ comes into play – It allows to analyze and compensate such a manipulation of the input signal before the signal is processed by the DSPs sound optimizing functions.
In addition the InputEQ provides amplitude-linear allpass filters to ensure an in-phase addition of the left and right channel which is especially important if subwoofers shall be added to installations where the OEM head unit is using allpass filters for their manipulations.
But why should I set an amplitude-linear allpass filter?
Allpass filters are often used in French and American vehicles instead of a time alignment to realize a wider stage image.
If the channels are summed up, typically the summation of the channels leads to a broadband cancellation in the lower frequency range and therefore a poor bass reproduction.
This issue can be solved by using an allpass filter as a correction in the InputEQ and can directly be verified through the ISA.
In these cases our Input Signal Analyzer (ISA) with its integrated InputEQ comes into play – It allows to analyze and compensate such a manipulation of the input signal before the signal is processed by the DSPs sound optimizing functions.
In addition the InputEQ provides amplitude-linear allpass filters to ensure an in-phase addition of the left and right channel which is especially important if subwoofers shall be added to installations where the OEM head unit is using allpass filters for their manipulations.
But why should I set an amplitude-linear allpass filter?
Allpass filters are often used in French and American vehicles instead of a time alignment to realize a wider stage image.
If the channels are summed up, typically the summation of the channels leads to a broadband cancellation in the lower frequency range and therefore a poor bass reproduction.
This issue can be solved by using an allpass filter as a correction in the InputEQ and can directly be verified through the ISA.
Tech Talk #3
Input Signal Analyzer
The ISA and InputEQ benefits at a glance:
Input Signal Analyzer:
- Tool for the frequency response measurement of an analog input signal.
- Adjustments of the InputEQ can be seen in the measurement with the ISA as well. This allows to instantly verify all InputEQ adjustments.
- Multiple input channels can be summed up before measurement to detect phase differences between each input signal.
- The summation can be adjusted in level and polarity for the optimum summing ratio in multi-channel active speaker systems. The result of the summation is directly visible in the ISA.
- The proportional summation of the measured signal can be transferred as "routing" directly into the IO channel routing to optimize the work-flow.
InputEQ:
- Used for the correction of the frequency response of input signals which have already been manipulated (generally in OEM head units). The goal is to linearize the frequency response before the signal is processed in the DSPs sound optimizing functions..
- Allows the use of amplitude-linear allpass filters to ensure an in-phase addition of the left and right channel for subwoofer integrations e.g. in special applications where Peugeot OEM head units are used.
Die Features des ISA und InputEQs auf einen Blick:
Products with Input Signal Analyzer
The Input Signal Analyzer is part of our new ACO technology and therefore included in all current Audiotec Fischer products with ACO platform.
Further information can be found here: ISA
