Triode wrote: > rpres - interested in your views of how accurate the spectrum analyser > is - on the 1980x1080 skin it doesn't look too accurate to me - I think > the gain is too high (some bars saturate, but also not sure how well it > matches the music) - have you done any tuning in this area - I think you > may have upped the frame rate. Wandboard can definitely handle this, > but do you have any recommendations?
Yeah there are a few that can be tweaked, it's all a trade-off though. Too high of gain and it clips, too low and the bars don't move much. You can reduce the overall gain by changing the bit shift "power_sum <<= 6" or you can enable the log function just above that. There is also frequency pre-emphasis "scale_db += 1.2" which changes the gain versus frequency, set this to zero for the best accuracy. There is also some stuff in there "X_SCALE_LOG" to create a non-linear frequency scale, so it gives more resolution to the lower frequencies. I played with the scaling somewhat and settled on a "reasonable" scale that seems to work well if the tracks have replaygain. A lot of pop tracks these days have a lot of gain, the so-called '\"loudness war\"' (http://en.wikipedia.org/wiki/Loudness_war), but replaygain helps here. A higher frame rate makes things smoother and more visually pleasing. I think most anything these days can do at least 30 FPS if not more. Myself I can see an improvement up to about 50 FPS. ------------------------------------------------------------------------ rpress's Profile: http://forums.slimdevices.com/member.php?userid=31544 View this thread: http://forums.slimdevices.com/showthread.php?t=98960 _______________________________________________ unix mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/unix
