Note that If the k-grid of the BSE simulation is a NxNx1 the exciton has an induced fictitious periodicity every Nx Nx1 Cell of the simulation.įor hBN-2D this is not a problem because the exciton is strongly localized but in other systems with more delocalized excitons to look at the real exciton size it is necessary to useįormat= "x" # Output format ĭirection= "12" # for 1d or for 2d for 3D To see the spatial character of the exciton YPP writes the exciton spatial distribution, in other words the probability to find the electron somewhere in the space when the hole is fixed in a give position.ĭifferent output formats can be selected and 1D,2D,3D plots done.Ĭreate the input and change the size of the cell where to see the exciton. The energies of the excitons and their Dipole Oscillator Strengths sorted by energy (Index). The new generated file o-2D_WR_WC.exc_qpt1_E_sorted ( o-2D_WR_WC.exc_qpt1_I_sorted ) reports We are sorting the excitons for the q-index = 1 (optical limit q=0). Sort the excitonic eigenvalues $ ypp -J 2D_WR_WC -e s 1 Ndb.BS_Q1_CPU_0 ndb.cutoff ndb.dip_iR_and_P_fragment_1 ndb.pp_fragment_1. Ndb.gops ndb.kindx ns.db1 ns.kb_pp_pwscf_fragment_1. If you have completed the tutorials of 2D hBN you should have all the databases required to do this tutorial in your YAMBO_TUTORIALS/hBN-2D/SAVE and 2D_WR_WC (databases generated with RIM and cutoff) directories You must have completed the How to treat low dimensional systems tutorial.7 Interpolate exciton dispersion (only in Yambo 5.x).6 Plot electron/hole average density (only in Yambo 5.x).5 Plot the exciton spatial distribution.4 Calculate the exciton oscillator strenght and amplitude.I have the tracker, too, but it’s a little fiddly sometimes to get connected… The webcam ALWAYS works and seems to require the least amount of hitting the calibrate button. If you haven’t tried the head tracker yet, I think the webcam is easiest to use and most reliable. A lot of headphone mixers tend to add too much and then it just sounds cloudy or muddy through a speaker. It reminds me to not “fill up all the space” and leave room in the music which is important. I find NX most useful during composition, especially, when using headphones. It reminds me of my Avantone Mixcubes.Īll in all this is my favorite of the bunch, but to your point I think it’s useful to test your mixes in the other “rooms” as well. Now CLA NX is, with Ocean Way being a close 2nd. Prior to CLA NX, Ocean Way was my favorite of the bunch. I have all the other NX plugins but I haven’t tried them to see if the head tracking improvement is specific to CLA NX or if it is improved globally. It just feels more like you’re in a room. While it might sound like it would be confusing on paper, in reality it’s not and you instinctively “understand” the changes without feeling like they’re wrong. For example, if you turn your head to look out the window, one ear gets a break. I hardly ever have to click “calibrate” anymore.Īre you using head tracking with NX? It’s not just a gimmick! It goes a LONG way to reducing ear fatigue because it’s varies up what goes to your ear. I’m a big fan of the NX series, but what’s blowing my mind about CLA NX is they seem to have fixed the “drift” issue. I will go back to the original NX, do some mixes and post my view on the comparisons. ![]() Now there is a new ‘CLA’ room iteration to consider - at the moment I am not going to get another version of NX but I did wonder, and hence this post, if any others might have some views on the subject. I have a feeling the original NX does a better job of the basic objective - achieving, on headphones, mixes that are ‘out of the box’ acceptable on speakers with minimal tweaking needed… even (am I really saying this!?) no tweaking at all. Good results also, but I am wondering now if the Nashville iteration is a touch ‘flattering’ and will go back to the original generic NX to make some comparison mixes. ![]() Since then I also got the ‘Nashville’ studio room version and have been giving that some solid use for a couple of months. I got very good results, a massive improvement on any previous headphone mixes (and I’m sure we all know just how bad those can be!) I was an early adopter of the first ‘generic’ NX plugin and use it with my Sennheiser HD600s, for which NX has a specific EQ curve.
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