Ciao a tutti.... scusatemi se ho bigiato per qualche giorno
- sta per uscire un nuovo upgrade frazionario intermedio 1.0.4 in attesa di quello relativo alle frequenze di campionamento,
Viene aggiunto un nuovo slider che permette il controllo del guadagno del DSP, la sua funzione e le modalità d'uso vengono spiegati nella versione revisionata del manuale (beta) che potete vedere qui:
Manual 1.0.4 beta
- nel fare le misurazioni con REW o altro e confrontarle bisogna tener conto che quello che viene visualizzato nella versione stereo è "average" cioè la media delle nove misurazioni.
Nella versione Full sono invece visionabili anche le nove singole curve.
E' anche importante tener presente che la misurazione in un singolo punto non da un rendiconto delle prestazioni all'ascolto perché come minimo usiamo due orecchie anche se non ci muovessimo di un millimetro...
questo è un post di jakob Agren della Dirac che spiega perchè:
"Mathematically it is possible to correct a room, perfectly, in a single point. For this case, only a single measurement in that single point is needed, and also any additional measurements will indeed not contribute at all, and if used, they will ruin the result in that one point.
However, it is important to note the conditions for this to be true. A single point indeed means just that, a single point, with point meaning a spot with no width nor height.
Now this is the theory, in practice we don't sit still, we move about, even if just small distances. Also we got two ears, located at different places, on average about 23 cm between them, so our ears are clearly in distinct positions. On top of this our speakers are placed in a room, introducing a multitude of reflexions. The reflected sound will arrive in different points in time, with different amplitude, to each ear, so at any moment in time the sound will not be the same in these two positions. In the attached image two different measurements are shown, with the distance between them being roughly 30cm
. Now, which one to chose if I can have only one?
Any solution trying to adress these issues is a compromise. Completely predicting the reflexion patterns is impossible with a small number of measurements, so an educated guess will have to do. The information used come from measurements in and around the measurement position. If you only have a single point you are effectively guessing what the result will be at your two ears. More often than not, your guess will be incorrect because the wave pattern, especially at mid and high frequencies, is fundamentally impossible to predict. When we take several measurements, our guesses about what's going on in between these positions, become better and better. As a rule of thumb, it becomes easier to predict the behavior in nearby positions the lower the frequency is, and vice versa. That's why a subwoofer correction can work OK in most cases even if just based on a single measurement, whereas a high-performance full-bandwidth optimization require more measurements in order to guarantee that we don't end up mistakenly making things worse at some frequencies. The real problem in room correction is to make the best possible estimate of what can be corrected and what can't. You need several measurements to do a good job at that.
More information about the Dirac Live Room Correction, and on why using mutliple points of measurements is actually a good idea can be found at: http://www.dirac.se/media/12044/on_room_correction.pdf"
Se a qualcuno interessa provare subito la nuova beta può mandarmi un MP