The Dirac Live algorithm suggests a target response appropriate for your listening environment and speakers, which you can of course adjust to your taste using our simple graphical interface.ĭirac’s digital Room Correction software supports up to 24-bit resolution at 192 kHz sample rate. Therefore, a slight roll-off is often appropriate when listening at a distance. Dirac Live can’t remove late reflections, because they change too much between different positions. This filter structure also has great numerical properties, and thus doesn’t produce any digital noise.Ī flat frequency response does not necessarily sound neutral due to the ratio between direct and reverberant sound and the frequency-variable propagation loss. At Dirac we use a proprietary filter structure that achieves maximum performance at much less processor usage than regular FIR filters. IIR and FIR filters both have their pros and cons.Many room correction filters use FIR filters for ease of implementation and optimization.Traditional EQ uses IIR filters for lowest processor usage.By paying particular attention to the variations across different measurement positions – not just the average – we can make sure not to overcompensate. After having conducted time-domain correction, we then treat the spectral colorations in a room. By addressing time-domain problems as such, and not as minimum-phase spectral problems, frequency response correction becomes more effective. Why is it that the same frequency response can sound so different from room to room? The answer lies to a large extent in the time-domain aspects of the measured frequency response, as well as critical differences in the spatial (angular) domain. Typically, the power ratio between the direct wave and the tail (later-arriving echoes) is improved by 6 dB or more, representing a vastly improved overall sound. By focusing on consistent problems across the measurement positions and correcting only these anomalies, Dirac Live can achieve a faster decay time. Dirac Live is unique in that it actually corrects the impulse response throughout the listening area, not just at a single point. Dirac Live corrects these in the frequency domain to achieve just the right resolution.Ī loudspeaker’s impulse response affects clarity, detail and all spatial aspects of the sound. After addressing consistent time-domain behavior, there may still be some late reverberation in the room that causes subtle coloration. Dirac Live room correction automatically finds consistent problems in a frequency-dependent way and corrects for them. Generally, at higher frequencies there is less consistent time-domain behavior. In terms of the impulse response, this means optimization of the direct wave and very early reflections. Dirac Live is unique in that it improves the impulse response throughout the listening area, not just in a particular zone.ĭirac Live uses several measurement positions (typically 9) in the listening room, making it possible to accurately locate and correct acoustic problems.Room-acoustic responses are non-minimum-phase, which is why Dirac Live uses mixed-phase correction. At best, they can minimize problems caused by the application of a filter. Minimum-phase and linear-phase room correction filters can’t physically optimize the acoustic impulse response in a room.Using a look-ahead buffer enables impulse response correction.For instance, BMW, Bentley, and Rolls Royce use it to enhance the audio performance in their top-level audio systems Datasat and Theta Digital use it for their high- performance cinema and audio processors and the Dirac Live® Room Correction Suite empowers any consumer to easily calibrate their own systems without breaking the bank.
DIRAC LIVE LOW SIGNAL TO NOISE LEVEL PROFESSIONAL
After careful analysis, Dirac Live® corrects for both the timing and amplitude aspects of the colorations in sound to deliver a uniquely pristine listening experience.ĭirac Live® technology is useful for both home audio systems and professional audio applications.
Using a microphone to analyze the audio system and room, the software then uses this data to build an acoustic model of the listening environment and detects the deficiencies. How does Dirac Live® Room Correction work? The result is substantially improved musical staging, clarity, voice intelligibility, and a deeper and tighter bass. Dirac Live® is a state-of-the-art digital room correction technology that uses sophisticated analysis of the speakers as well as the listening room to optimize the speakers’ overall audio performance and to remove sound colorations introduced by the room.