10-Jan-2021, 20:36
@PeppaPig ,
What Sweet Room and similar systems like Dirac are designed to do is to compensate for the effects that the room has on the sound. At low frequencies those effects are due to room modes at frequencies related to the dimensions of the room. The effect of those modes on the frequency response you hear depends on where in the room you are, or where you place the mic to make your measurements. There will be some places in the room where you will get strong peaks at the modal frequency, other places where you will get a strong null, and other places where the effect is somewhere in between those 2 extremes. The corrections you make are based on the measurements at a particular point in the room and they aren't valid for other points in the room. You can't make a correction that will work for the whole room because if the same room mode causes a peak in one location and a null in another then you would need a cut in level to fix the peak and a boost in level to fix the null. Sweet Room will let you apply a cut or a boost but not both at a given frequency and it can'd do anything which will create a cut at one point in the room to fix a peak while also creating a boost in other parts of the room to fix a null. All you can do is to correct for the effects of the room at the point where you make your measurements.
When it comes to walking around the house, once you leave the room where the system is and walk into another room you've walked into a space with an entirely different set of acoustic issues because the dimensions of the new space are going to be different and also because the sound source, your speakers, are in a different position relative to the new room than they are in relation to the listening room.
You may not want to optimise for a fixed listening position but you really can only optimise for a fixed listening position. You can make the position you optimise for a little larger by making measurements over a slightly larger area, say within a 2 or 3 foot radius of a central point, but the result of that will be a little worse for the actual point of the listening position and a little better for the small surrounding area that you also measured. The bigger the area you try to fix, the more inaccurate the correction will become for the fixed listening position so the bigger the area you try to fix, the less effective the correction becomes for the fixed listening point and the less effective it becomes over most of the larger area.
There simply is no single correction profile that will work well everywhere if you want to have equally good results while you're walking around your house, or even around the room in which the speakers are located. You're trying to achieve something which is impossible.
What Sweet Room and similar systems like Dirac are designed to do is to compensate for the effects that the room has on the sound. At low frequencies those effects are due to room modes at frequencies related to the dimensions of the room. The effect of those modes on the frequency response you hear depends on where in the room you are, or where you place the mic to make your measurements. There will be some places in the room where you will get strong peaks at the modal frequency, other places where you will get a strong null, and other places where the effect is somewhere in between those 2 extremes. The corrections you make are based on the measurements at a particular point in the room and they aren't valid for other points in the room. You can't make a correction that will work for the whole room because if the same room mode causes a peak in one location and a null in another then you would need a cut in level to fix the peak and a boost in level to fix the null. Sweet Room will let you apply a cut or a boost but not both at a given frequency and it can'd do anything which will create a cut at one point in the room to fix a peak while also creating a boost in other parts of the room to fix a null. All you can do is to correct for the effects of the room at the point where you make your measurements.
When it comes to walking around the house, once you leave the room where the system is and walk into another room you've walked into a space with an entirely different set of acoustic issues because the dimensions of the new space are going to be different and also because the sound source, your speakers, are in a different position relative to the new room than they are in relation to the listening room.
You may not want to optimise for a fixed listening position but you really can only optimise for a fixed listening position. You can make the position you optimise for a little larger by making measurements over a slightly larger area, say within a 2 or 3 foot radius of a central point, but the result of that will be a little worse for the actual point of the listening position and a little better for the small surrounding area that you also measured. The bigger the area you try to fix, the more inaccurate the correction will become for the fixed listening position so the bigger the area you try to fix, the less effective the correction becomes for the fixed listening point and the less effective it becomes over most of the larger area.
There simply is no single correction profile that will work well everywhere if you want to have equally good results while you're walking around your house, or even around the room in which the speakers are located. You're trying to achieve something which is impossible.
Roon Nucleus+, Devilalet Expert 140 Pro CI, Focal Sopra 2, PS Audio P12, Keces P8 LPS, Uptone Audio EtherREGEN with optical fibre link to my router, Shunyata Alpha NR and Sigma NR power cables, Shunyata Sigma ethernet cables, Shunyata Alpha V2 speaker cables, Grand Prix Audio Monaco rack, RealTRAPS acoustic treatment.
Brisbane, Qld, Australia
