23. December 2023
It is quite usual to assess and represent the impact of a room by only plotting its frequency response at listening position (or multiple positions) …. And most of the correction systems or DIY methods are only using this information to generate filters. This is a significant shortcut as any signal is only fully defined by the combination of its frequency (magnitude) and phase response. The same applies to the impulse response, the signal that characterize the room behavior. We can find an...
30. March 2023
The commonly agreed requirements for loudspeakers crossover filters are Flat magnitude of the combined output Sufficiently steep rolloff slopes between the output bands Acceptable polar response Acceptable phase response Increasing the rolloff slopes has a very positive impact on distortion and imaging: each driver operates in its own frequency range and the overlap region is reduced. There are many resonances from woofer or mid range drivers that could be avoided by using crossovers with...
19. June 2022
So far Room Shaper playground was the low and medium range. We have now managed to extent its operational range to higher frequencies. Even if the concept of reverberation time mainly applies to large rooms like concert halls, it can be extended to smaller rooms by looking at the energy decay time and how it evolves depending on frequency range. Large fluctuations of decay time in narrow frequency bands is a fingerprint of small room in the low end where resonances dominate. In the upper range,...
15. February 2022
Although not described in the original stereo proposals, the 60° playback angle has become the standard over years. Sound engineers are using this configuration during the different stages of recording & production process. You might not have this standard 60° configuration at home for different reasons: installation constraints, personal preference, use of acoustic crosstalk reduction (lower span angle improve effect robustness) Any deviation from the standard configuration has an impact...