Target curve, timbre target, LF target

Following fields are needed for the calculation of your optimised target curve :

  • Field “Target curve” : “Auto music” is recommended for home HiFi and pro music studios. For calibration of theaters or mixing rooms, SMPTE targets maybe be used with a choice depending on room size. Other possibilities are AES and B&K bin some cases. The new “Dolby Atmos Music” target has been added to comply to Dolby Home Entertainment specifications.
  • “Timbre target” (only valid if “Auto music” is choosen) : the standard “Balanced” can be adjusted on user preferences to Bright (sharp, more high frequencies) or Warm (darker, more low frequencies). Difference to “Balanced” is a slope of approximatively +-0.3dB/oct (exact value depends on measurements,  distances and directivity) so nearly +2dB at 10kHz for “Sharp” and -2dB at 10kHz for “Warm”.
  • “LF target” (only valid if “Auto music” is choosen) : low frequency target is defined by cutoff frequency and level for L+R : hereunder  “409” gives a +9dB level and a 40Hz cut. Level at 40Hz cuttof freq is +9-3=+6dB. Level at 130Hz is half max level so +9/2=+4.5dB. As LF target for Auto Music is optimised for both speakers together (L+R), so to get a flat response for each separated channels, choose a value ending with 3 (ie 403 or 603), because L+R in low frequencies gives nearly +3 or 4 dB compared to response of L or R separated.

After the target curve is calculated, it is available in ‘My measurements’ as ‘target.drc’ so you may use this target for other purposes, ie with Sbragion’s DRC-FIR software.

Read more on this topic here.